# How to Calculate the Gear Ratio for a Tire?

The easiest way to calculate the gear ratio for a tire is with a calculator. You can find an on-line calculator at:
Reference:
Ask.com Answer for: how to calculate the gear ratio for a tire
How to Calculate the Gear Ratio for a Tire
You can calculate the gear ratio for a tire manually or by utilizing an online calculator. Gear ratio is related to the size of the tire and the RPM output of the engine. When you decrease the size or diameter of the tires on your vehicle, the engine... More »
Difficulty: Moderately Easy
Source: www.ehow.com
Q&A Related to "How to Calculate the Gear Ratio for a Tire"
 1. Count the number of pinion gear teeth and ring gear teeth when installing a new gear set in your vehicle. The pinion is connected to the vehicle's driveshaft and turns the ring http://www.ehow.com/how_5965910_calculate-gear-rat...
 When learning how to calculate gear ratios you can either use or tech ratio calculator online or use the gear ratio formula. This formula is Gear Ratio = RPM X Tire Diameter (inches http://answers.ask.com/Reference/Other/how_to_calc...
 Number of teeth on driven gear divided by teeth on driven gear. Example: 40 teeth on a ring gear and 10 teeth on a pinion will be a 4.00:1 ratio. http://wiki.answers.com/Q/What_is_the_formula_to_c...
 The following is how I would work it out. I have used SI units as I live in Europe - the principle is the same for those using other units of measurement. I'm not claiming any degree http://www.quora.com/Cycling/Whats-the-formula-to-...
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