Gear Ratio Speed Calculator

Bikers sometimes choose their sprocket sizes by calculating the gear ratios in "gear inches. Thanks in advance for any help your guys can provide. The gear ratio calculator uses 2 combinations of gears to output an overall drive ratio. The gear ratio is controlled by the number of teeth even if the diameters are a bit off. The high-ratio “L2″gearcase ( 2008-2010 ) displays the line at the 9:00 position signifying that it is a 1. 19mph* I want more top speed instead. I am sending it a frequency from 0 to 60HZ. The 4x4 and Gear Calculator will help you find any one of the below values. 81:1, just type in 0. To calculate gear ratios and the effect they have on torque, you need the size of each gear and the torque acting on the first gear, which mechanics call the “driver. The default transmission ratio is for the 200-4r in OD. Please enter Spur, Pinion and Internal gear ratio. Rear End Axle Ratio (ie 3. For example if your sitting at a stop the gear ratio is infinite because speed is zero. WOW, you guys have some insane fast pocket bikes. Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission, interior codes, and paint codes. im running 4. This calculator will provide the speed of the vehicle based on the transmission gear ratio, the engine RPM, the tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. The total is the gear ratio for that gear setting. Thanks in advance for any help your guys can provide. Gear-Speed Calculator for Dodge 2500/3500 with Cummins Turbo Diesel Axle Ratio 3. Bicycle Gear Calculator - calculate cadence / speed / power for different sprocket / gear sizes - hub gears. If you would like to find a value other than speed, fill in information for all the boxes and clear the value in box you would like an answer for. Using the correct auto ratios with 3. In this video we will be going over how to calculate the number of revolutions the wheels will turn for a given engine RPM, what the torque multiplication will be. i=n1/n2=D2/D1 ,i=n1/n2=z2/z1. Transmitted power output 10 kW, electric motor speed 1450 /min, required output speed 30 /min. S o = output speed (rad/s, rpm) S i = input speed (rad/s, rpm) Example - Gear Output Speed. (Chain Length and Gearing Calculator). Gear Ratios. Table below: Shows table of all possible chainring/sprocket combinations with gear ratio. Pinion tooth count = 120 teeth/10 = 12 teeth. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. The results will then be: Automatic transmission in Drive; Automatic transmission in Overdrive. Pressing the "Reset" button loads the default values into the form. Explain the behavior of a two-gear gear train. The super low first and overdrive 5th gear make this one of the few transmissions that has the best of both worlds. With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio. Note that not all sprocket sizes are available for all chain types. CRF's Only Gear - RPM - Speed Calculator Please read disclaimer. Shift RPM Multiplier: Multiply your desired shift point RPM by the multiplier to find the engine RPM after the shift. 00 Profile 70. Drive Gear Teeth - The Number of teeth for the transmission; Rear End - Rear Gear Ratio (3. Obviously, there are other tire/wheel sizes here that I haven't listed however the sizes listed give you. Input conditions. Have a question for those who understand all this gear ratio stuff. If you would like to find a value other than speed, fill in information for all the boxes and clear the valu in box you would like an answer for. In order to get the best ratio for your Wrangler you will want to play with this until you get the desired RPMs. Understanding your vehicle’s gear ratio is a powerful tool when making changes at the track or around the. it was a disappointment until i changed my gears to a 3. 965 was used to account for the reduced tire diameter caused by numerous factors (see below). Instructions: Use this calculator to estimate various aspects of your performance. The defaults show suggested values. 2 which equals 1, so there is no change. How to Spec any truck with an Eaton Transmission; Select Desired RPM, Select Tire size and finally choose transmission gear ratio, 0. RPM's per volt Enter the LiPo cells in series Enter the amount of teeth for the pinion gear and spur gear Enter the amount of teeth for the pinion hear and spur gear of the differential Enter the diameter of the tires in mm. 73 seems most popular. choose a 15/16/17/18 to give the desired gear that matches with your chainring. 5 and later) For earlier models replace 5th gear with. The total is the gear ratio for that gear setting. Obtaining good top speed, while retaining sufficient torque to get your cart moving quickly is a delicate balance. Using the Gear Ratio Calculator, we specified a 26. Bicycle Gear Calculator - calculate cadence / speed / power for different sprocket / gear sizes - derailleur gears. See effect on RPM in Gear/Sprocket matrix when changing sprockets. Shipp Belting offers solutions for every conveyor system. The first set is the main gear set which is generally starting at the motor or nitro engine. Our speedometer calibration calculator will get you the answer you are looking for. Easily Calculate the Correct Size of Sprockets and Chain Length. This calculator does not take into consideration any drive train loss, road. e) The bus gear ratio 4. Now we’ll factor in gear ratio. WOW, you guys have some insane fast pocket bikes. Note that neither of these are equal to the gear ratio for the entire train, 4. Enter the tire size diameter and the target vehicle speed in MPH. Click here to download. Go Kart Gear Ratio Calculator for Jackshaft Setup. net) Battery information : Collapse: My presets. Go with the 3. How you can see in the following image:. GM/CHEVROLET FINAL DRIVE RATIOS It is the gear under your seat that counts. When ever you change tire size from the original size to another there will be a direct effect on power and drivability. It will help you to find the best gear ratios for your racing car and to understand when it is the best time to change a gear. Choosing the right differential gear ratio will help regain lost power and torque. Includes derailleur gears and internal gear hubs. i represents transmission ratio or gear ratio n1 represents the speed of drive gear n2 represents the speed of driven gear D2 represents the diameter of driven gear D1 represents the diameter of driving gear Z2 rep. About this Engine RPM / Tire Size chart: The following chart of Tire sizes and axle gear ratios are meant to give a general idea of the relationship between the differential gear ratio and the tire size and. By improving the surface area, the synchro slows the gear faster making for smoother shifts. Gear Ratio Speed Calculator By AssassinRacing. Calculators. June 15th, 2019 (Tiburon, CA) Memo Gidley and his crew of 7 had a great fifth place finish in last weekend’s OYRA Farallones Race. Gear Ratio Calculator. The product lines includes motor frame sizes ranging from 12mm to 95mm, gear ratios ranging from 10:1 to 3000:1, and up to 200kgf. Enter the values below to calculate your gear ratio. To calculate gear ratios and the effect they have on torque, you need the size of each gear and the torque acting on the first gear, which mechanics call the “driver. Top gear is selected to get a maximum speed and is limited by the engine power, speed and the fuel economy. Remember there are variations in tyre sizes and wear will also affect actual readings so this is a guide only. Enter the values on the left and press Compute, the gear calculator will take care of the rest. • You can calculate the gear ratio by using the number of teeth of the "driving gear" (a. Here is a cgi I wrote to do gear ratio calculations. com Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches. Graphical gear calculator for bicycle gearing systems. 88 ring and pinion). Calculate your differential gear ratio from RPM, tire size and desired MPH Ring Gear/Pinion Gear Teeth to Gear Ratio Enter the # of Pinion Gear teeth and the # of Ring Gear teeth to find the correct Rearend Gear Ratio for your Rig!. Calculator for the right gear ratio on the speedometer. To calculate the gear ratio, divide the number of teeth in front chainring by the number of teeth in a rear sprocket:. The aspect ratio is the height from the edge of the rim to the edge of tire that touches the pavement. 2000 to 2007) I used to use a calculator to toy with the idea of changing the differential ratio for different circuits and to see how much top end speed a few hundred extra revs would buy me. Scroll through the list of popular transmissions to find yours. S o = S i / r (2) where. Honda Transmission Gear Ratio Calculator. 6 for trans. Top gear is selected to get a maximum speed and is limited by the engine power, speed and the fuel economy. rpm / speed / gear ratio calculator. You’ll learn how to calculate the change in engine rpm at any given speed after you’ve changed rear-axle ratio, tire diameter, or transmission ratio. The gear ratio calculator uses 2 combinations of gears to output an overall drive ratio. SINGLE SPEED GEAR RATIO? rocklobster. 19mph* * I used the default settings of 20in tires and rpm of 8250. Note that in this car both 4 th and 5 th ratios are less than 1:1 – so both 4 th and 5 th are what is called ‘overdrive’ ratios. To the best of our knowledge it provides a good quality of accuracy but we do advise that you should always double check your results to avoid any problems. But it is still VERY interesting. Gear Ratio Calculator. In general, you can calculate rotational speed using the following gear ratio equation: S 1 • T 1 = S 2 • T 2, where S 1 is the speed of the driver wheel and T 1 is the number of teeth on that wheel. : calculators useful for electric vehicle conversions. 50 in my 65 falcon and that is as low as i would want on the freeway using a 235-60-15 tire with a c-4 trans. RPM Calculator. This tool calculates your in-gear speeds based on your tyre size, gear ratios and final drive ratio. How do we calculate the ratio of a gearbox with two 10 teeth “planets” that are spinning at the same speed in t. 55 axle ratio(4. Basically, the ratio is determined by the number of teeth on each gear wheel. One of the most common pieces of Mustang advice is to sway the gear ratio (axle ratio) in the differential. How to choose the correct gear ratio for the rearend in your race car and match the final drive ratio to a racetrack and track conditions - Circle Track Magazine our speed will be mostly. For example, you may wish to know what effect that 4. The charts below list the top speed in each gear factoring in final drive and tire diameter. The 4x4 and Gear Calculator will help you find any one of the below values. How to Spec any truck with an Eaton Transmission; Select Desired RPM, Select Tire size and finally choose transmission gear ratio, 0. Then again, if you change the gear ratio from 1000/40 to 800/40, the gearbox needs another 20 percent extra torque in addition to the former 20 percent. The Pinion gearbox calculator helps you to choose the ideal gearbox tuning. at 65 i run close to 2800-3000 rpm. To calculate the car’s gear ratio, you need to be familiar with the type of drivetrain it has. Facebook; Twitter; Instagram © 2019, All Rights Reserved. These are the ratios of each gear in a 5-speed manual gearbox. Accounts for sprocket sizes, engine RPM, and tire diameter. Be sure to take a look at the Prop Slip page for an explanation of how to find your prop slip. You can enter your own sprocket and tyre sizes to check the effect on gearing. ⚙ Calculate Chain and Sprocket Sizes, Lengths, Ratios, RPM and Chain Speeds. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 29 gear has a lower ratio than a 4. Enter the tire size diameter and the target vehicle speed in MPH. 35 gear set. Beyond the big ring: Understanding gear ratios and why they matter either value can be used to easily calculate the expected speed for any given cadence: While these larger steps promise. How to Spec any truck with an Eaton Transmission; Select Desired RPM, Select Tire size and finally choose transmission gear ratio, 0. Get the Final Ratio on multi sprocket setup used in jackshafts on go karts and mini bikes. Gear Ratio Calculator. Enter R&P Ratio, Tire Height, Speed (mph), and Transmission Ratio, then click Solve to calculate RPM. Team: 4- 6 per team Supplies: Assortment of Vex Parts: 2. 2nd Gear: 3rd Gear: 4th Gear: 5th Gear. Bike Calculator. Gear Ratio Calculator. Gear Ratio = 60:1 (Rotary velocity is also reduced by 60:1) Quite simply, this means a worm gear reduces the speed of the spur gear by sixty times. 965 was used to account for the reduced tire diameter caused by numerous factors (see below). Standard Drill Sizes. 10, ) Speedometer Scalars (We do not recommend that you manually adjust these values) VSS Pulses/Mile: This value is used to calculate the speed value for the engine routines and gauge cluster. (Values show are typical examples. (Note: the symbol * indicates. Using the form below, you can obtain a good indication of the relationship between pedal effort, cadence and bicycle speed in different gears. Manco Go Kart Sprockets, Carter Sprockets, American Sportworks Sprockets and many more. Deebeaux's VW TDI 02M/02J/02Q Gearspeed Comparator This should give you a decent idea of the speed of your vehicle at the given RPM in various transmissions. Determine Speed: Use this calculator when you know your gearing and want to find your Speed at a given RPM. • You can calculate the gear ratio by using the number of teeth of the “driving gear" (a. 56 to 1 = 45. Determine RPM: Use this calculator when you know your gearing and want to find your RPM at a given speed. See effect on (Top-)speed in Gear/RPM matrix. Solve for your Crawl Ratio. Our Gear Ratio Calculator allows you to determine what your Top Speed will be given the maximum safe RPM of your motor, the number of teeth on the front and rear sprockets (aka the sprocket and chainring) and the diameter of your rear wheel (enter in Inches). Ok, since I was unable to find the site with the gear/speed calculator that was posted in another site a while back, I have decided I would make one myself using Excel 2003. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. You can alter the axle gear ratio, transmission gear ratio, tire height or profile, torque converter efficiency, and see the impact in real-time. Manual transmissions are characterized by gear ratios that are selectable by locking selected gear pairs to the output shaft inside the transmission. This calculator that lets you select sprocket and tire dimensions to see the effect they will have on top speed and RPM in each gear. 283 -> super T10 -> 2. e) The bus gear ratio 4. ) Unfortunately designed for Microsoft Internet Explorer. Mine are 38000 or 40000 lb. Lower ratios are generally desirable when going off-road. Go with the 3. Simple explanation of gears, gear trains, and gear ratio calculations. Gear inches is used mostly for comparing one drive train ratio to another and has little physical basis on a bicycle with derailleur gears. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. In order to get the best ratio for your Wrangler you will want to play with this until you get the desired RPMs. I think that would make a decent 75mph truck. com's automath you agree to use this service for your own personal use. Gear Ratio Calculator for Vehicle with Jackshaft. Calculators. Ring-and-pinion selection made easy! Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Just type in your info (example: 5000 RPM), press calculate, and you'll get the right ratio without the guesswork. Remember that this is where the belt climbs to about 7/8 of an inch from the rim of the primary. DODGE/DODGE RAM FINAL DRIVE RATIOS Find your transmission and rear gear multiplier below. might get down the strip little quicker and more consistant with. Enter your gear ratio information, or use mine as the default. Below is an example for calculating top speed that can be used for all gears. R/C Vehicle Speed Calculator. However, this calculator can give a rough guide to minimum chain length in this situation - for Derailleurs, enter the largest sprocket on each end, ie. Manual bike data input also possible. If you're curious how changing ratios will affect your gearing, this tool will remove the guesswork. 31 - by Fredrik Melin ([email protected] To use the Gear/MPH. Selecting Pulleys for a Powerdyne / Cool Charger / B&M / Ford Motorsports / Dinan. Driveshaft Speed Calculator; MPH - Gear Ratio Calculator; Gear Ratio Difference Calculator; Gear/Tire Calculator; Gear Ratio Needed Calculator; RPM Drop From Shift Calc; RPM/MPH From Gear Ratio Calculator; Speedo Gear Calculator; Tire Height Calculator; Converter Slip Calculator; Brake Master Cyl Calculator ; Head - Exhaust Calculators; Air. 10, ) Speedometer Scalars (We do not recommend that you manually adjust these values) VSS Pulses/Mile: This value is used to calculate the speed value for the engine routines and gauge cluster. Skid Patches. 1 kgcm 2, and a load inertia, J L, of 20 kgcm 2, the required gear ratio is:. Ratio: MPH 1st Gear: The estimated speed you will be traveling based on the parameters you established and the transmission you selected. Make the necessary changes to your speedo by replacing your Jeep Speedometer Gear. Finally, even an 'optimal gear ratio' might well not suit a particular driving style, which is very dependent on the individual person. MrMel - HS Calculator - V3. Crawl Speed at Given RPM in Feet Per Minute Road Speed at Given RPM in Miles Per Hour Road RPMs at Given Speed There are options to factor in crawlers, axle gears, and tire size. 2000 to 2007) I used to use a calculator to toy with the idea of changing the differential ratio for different circuits and to see how much top end speed a few hundred extra revs would buy me. Taking the first answer of 109. Scroll through the list of popular transmissions to find yours. In this chapter we will present a complete design of a one-speed gearbox driven by a belt transmission and driving a chain transmission. I have seen one that a member here has posted for rpms and speeds for ratios, but what i'm looking for is a calculator that will tell you the needed teeth on each gear is to achieve. 6800 rpm) to determine your propeller RPM (i. It has the same funcitonality as the form you see below except that it runs on your desktop with no internet connection needed. The gear set in the top illustration indicates gear reduction. Click on Calculate. Just enter the data in the white boxes below, then click the "Calculate" Button. This calculator is fairly new and still in testing, graphing times may be up to 8 seconds. It then tells you the rpm in each gear along with the rpm drop on gear changes. rpm, tire size, speed, differential ratio battery pack capacity. Applicable Calculator Formulae PI = 3. output is faster (less torque) or has more torque (slower). You can play around with it by changing the tires, the transmission top-gear ratio, and the r. Introduction. Drag Max RPM slider to adjust the range of the RPM and MPH Gauges. TRSL-XXX: Lbs. 30 gears in their axle is because the transmission ratios are insanely tall. Engine RPM divided by total gear ratio, multiplied by the tire diameter and converted for units of measurement, gives vehicle's speed of travel. Remember there are variations in tyre sizes and wear will also affect actual readings so this is a guide only. 08 revolutions for every one revolution of the axle. Determine RPM: Use this calculator when you know your gearing and want to find your RPM at a given speed. Gear ratio and RPM Calculator: Instructions: Use this calculator to estimate various aspects of your performance. Special Note#1There was a 5 speed 720 truck('79-'85)transmission that will bolt into an L-6 car, that also has "lower" gearing. revised 8-26-24. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual measured values below. See effect on needed sprocket distance, chain lenght and # links. 88 ring and pinion). Enter either the linear speed (speed in a straight line) or the angular speed (rate of rotation) in the appropriate blue box, then enter the radius of rotation. You can either enter the values manually or use the presets on the right. This calculator that lets you select sprocket and tire dimensions to see the effect they will have on top speed and RPM in each gear. net) Battery information : Collapse: My presets. This page is a Differential Gear Ratio Chart for comparing tire size to axle gear ratio and the combined effect on power and fuel economy. The speed in MPH is miles per hour. This leads to different gear ratios and output rotation directions. For example, if the desired inertia ratio, J ratio, is 5:1, with a motor inertia, J M, of 0. Ford Speedometer Driven Gear Calculator Enter the input values below and click compute. There are a million ways to got with trannies and diffs. If you're curious how changing ratios will affect your gearing, this tool will remove the guesswork. Instructions: Use this calculator to estimate various aspects of your performance. To end this long rant, don't listen to the people telling you to use your stock gear ratio to determine a new gear ratio for a larger tire. GM/CHEVROLET FINAL DRIVE RATIOS It is the gear under your seat that counts. Well, since we have main shaft and power system shaft speeds and we know that the speed ratio is the same as the gear ratio, let’s calculate the gearing numbers and pinions we need if we want all three helis to run a 120-tooth main gear. These resistance factors could make the top speed slower than the calculation. 12 X 38" = 4. Ratio of the highest gear of your setup. Now thats not a heck of a difference but I switched to Avid 7 tooth 3" pitch drivers last winter and they are 6. Enter Diff + Gear Ratios and tire diameter, then drag RPM slider to calculate speed from RPM. This calculator will provide the speed of the vehicle based on the transmission gear ratio, the engine RPM, the tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. Low gear ratio equals power, high gear ratio means speed. Manco Go Kart Sprockets, Carter Sprockets, American Sportworks Sprockets and many more. Engine Alternatives. Use this form to calculate your top-speed Engine RPM Top-rated RPM for your engine Teeth on Axle Number of teeth on axle drive sprocket Teeth on Clutch Number of teeth on clutch sprocket Diameter of Rear Wheel Height of rear wheel in inches Top Speed miles per hour Calculate. Simple explanation of gears, gear trains, and gear ratio calculations. Click "Calculate Differential Gear Ratio". Gear calculator solving for velocity or speed MPH given tire radius, revolutions per minute RPM, and gear ratio. Sprocket Calculator, Calculate the Number of Teeth of a Drive Sprocket to Achieve a Certain RPM Output. Theoretical Top Speed Calculator. Gear ratios vary between manufacturers, between the engine models of each manufacturer and between High Thrust and regular gear ratios. CRF's Only Gear - RPM - Speed Calculator Please read disclaimer. The entire spectrum of a Pinion transmission can be shifted to fast or slow with the secondary ratio to the rear wheel. The next gear ratio is an internal transmission ratio or most commonly a. Street tires are rated using three numbers for example 225/70R15 or 255/70/15. It's very easy. (Note: The calculator converts under the assumption that one unit of the gearbox is fixed (sun, planet carrier and annulus gear), therefore does not rotate). Using the correct auto ratios with 3. Solve for your Crawl Ratio. WOW, you guys have some insane fast pocket bikes. When most people talk about a marine gear ratio, they mean the reduction ratio of the motor that expresses the number of times the motor turns--the number of revolutions--to turn the propeller once. So, if you plan to run the machine 50 RPM insteda of 40, it will probably mean that you need 20 percent more torque into the machine. Rear End Axle Ratio (ie 3. What is a gear calculator ? The gear calculator is a comprehensive software which, after inputting various parameters related to gear calculations, computes on-line automatically gear sizes, strengths, working forces, tooth forms, backlash conversions, etc. Emergency Service. If you don't know what ratio to use, try our Free Speed calculator. Try this handy custom calculator. The Drive Ratio and Speed sections may also be used for gears, though obviously the other sections will be meaningless since gears must be on defined centres to mesh properly. K A is a coeficient used in the formula that calculates air resistance: Source Bicycling Science:. When most people talk about a marine gear ratio, they mean the reduction ratio of the motor that expresses the number of times the motor turns--the number of revolutions--to turn the propeller once. To use our Hurricane Gear Calculator, fill in the fields below with appropriate information. Use the Aspect Ratio calculator below if you do not know your tire height. Speed depends on all these things. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. The first set is the main gear set which is generally starting at the motor or nitro engine. Click on Calculate. for the lowest gear. 56) The below table can be used to get a rough idea on gear ratios. Enter the RPM, Tire Height in inches, The Rearend Gear Ratio, The Transmission Top Gear Ratio, and The MPH, Then Press 'Enter' Key Conv Slip% = [((RPM * Tire Height) / (Rearend Ratio * Trans Ratio * MPH * 336)) -1] * 100 RPM Tire Height Rearend Ratio Trans Ratio MPH. So, if you plan to run the machine 50 RPM insteda of 40, it will probably mean that you need 20 percent more torque into the machine. 10% of your potential fuel mileage. If you know the speed ration and the speed input, you can calculate the speed output using the formula output speed = input speed ÷ speed ratio. However, there were two other sets of different gear ratios available, depending on the truck model:. Lenco offers an extensive variety of transmissions. This Final Drive number is also your torque multiplier when in that gear. Gear Ratio Speed Calculator By David Nguyen Calculate theoretical speed for a car in each of its gear ratios. 38) Using the first link, my top speed in 5th would be = 73. Click on Calculate for results. This calculator determines the top speed of the vehicle with no margin for mechanical, rolling, or wind resistance. Theoretical Top Speed Calculator. Rear End Axle Ratio (ie 3. Primary Gear Reduction Ratio: 1st Gear Ratio: 2nd Gear Ratio: 3rd Gear Ratio: 4th Gear Ratio: 5th Gear Ratio: 6th Gear Ratio: Front Sprocket Tooth Count: Rear Sprocket Tooth Count: Rear Tire Diameter: (inches) [can also use calculator below] Engine RPM Low: Engine RPM Max:. How you can see in the following image:. Bikers sometimes choose their sprocket sizes by calculating the gear ratios in "gear inches. This calculator is fairly new and still in testing, graphing times may be up to 8 seconds. You can lift a heavy object easier with a longer lever. 19mph* * I used the default settings of 20in tires and rpm of 8250. Forget the slow web calculators with limited features. To use our Hurricane Gear Calculator, fill in the fields below with appropriate information. T56 Gear Ratios. Gear ratio = 20,000RPM/2,000RPM = 10:1. ” This is done by dividing the number of teeth on the chainring (drive gear) by the number of teeth on the rear sprocket and multiplying by the wheel diameter. Includes transmission gear ratio, weights, length & PTO speed. The fact that one gear is spinning twice as fast as the other results from the ratio between the gears, or the gear ratio (Check out our gear ratio chart for more info). Gear Ratio Calculator. Calculators. This calculator outputs the how fast a car can go in each gear as calculated by the gear ratios, engine redline and tire size. But once the car is moving, the torque required reduces and therefore, the gearing can be used to increase the speed. 2nd and 3rd gear ratios decrease slightly. This calculator will help you find your Tire Diameter, Transmission Ratio, T-Case Ratio, Engine RPM, Gear Ratio, and MPH. Many factors have been taken into consideration to make this calculator as accurate as possible, but certain variables like vehicle weight, battery quality, drivetrain drag, etc can have an effect on the actual speed. The next gear ratio is an internal transmission ratio or most commonly a. Normally, if the vehicle speed is higher than the other under compared gear ratio, then it means it has less torque, which usually means weaker acceleration, although higher vehicle speed, but will achieve the particular top speed much longer time than required compared to the other gears. Another possible use is comparing how different tire sizes would effect engine RPM at a given speed.