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Gear Design Equations and Formulas Calculator
Automobile Car Truck
Solving For Gear Ratio
Inputs:
Conversions:
| tire radius | = | 0 | = | 0 | inch | |
| rotation veloctiy | = | 0 | = | 0 | revolution/minute | |
| speed | = | 0 | = | 0 | mile/hour |
Solution:
| gear ratio | = | HAS NOT BEEN CALCULATED |
Other Units:
Change Equation
Select an equation to solve for a different unknown
Select an equation to solve for a different unknown
 |
speed |
 |
rotation velocity |
 |
gear ratio |
 |
tire size - radius |
 |
effective gear ratio |
 |
tire size - diameter |
 |
crawl ratio |
Where
| speed | = | MPH - miles per hour |
| tire radius, tire diameter, rim diameter | = | inches |
| gear ratio | = | if ring and pinion ratio is 4.10:1 use 4.10 |
| rotation velocity | = | RPM - revolutions per minute |
| effective gear ratio | = | determine new gear ratio after a tire size change |
| crawl ratio | = | four wheel drive rear axle differential, transfer |
| section width | = | millimeters |
| aspect ratio | = | unitless |
References - Books:
See 3 and 4 on reference page
AJ Design - Online Science Mathematics Engineering Software Programs | 2 | 3 | 4 | 5
by Jimmy Raymond
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