1. Optimizing a Lifted 4x4 Truck Drivetrain
Off-road enthusiastBackground
An owner is upgrading their truck from stock 265/70R17 tires to larger 285/70R17 tires and wants to see how it affects their 4.10 differential gearing.
Problem
The larger tires will lower the effective gear ratio, potentially causing sluggish acceleration and speedometer inaccuracy.
How to use
Enter '285/70R17' as the tire size, '4.1' as the final drive, and the transmission ratios. Add '265/70R17' in the original tire field to compare the differences.
Tire Size: 285/70R17, Final Drive: 4.1, Gears: 3.6,2.1,1.4,1,0.8,R3.8, Original Tire: 265/70R17, Units: metricOutcome
The calculator shows the tire diameter increases to 32.8 inches, displays the exact speed matrix for each gear, and calculates the speedometer error at 100 km/h.