Quick gearing question

[TRanger03]

Once I put on my 3in BL and get prerunner fenders, I plan on running 35x12.5x15s on 15x10 wheels. Should I go with 4.10 or 4.56 gears? And how bad is all of this going to affect my speedometer and gas?

 

[Hahnsb2]

4.88.

 

[Sasquatch_Ryda]

Yup, 4.88's.

 

[strvger]

there is a speedometer calculator in the tech library here. otherwise, i would expect your mileage to drop some with those big, fat tires. they add considerable weight, rolling resistance, and wind drag. good news is 4.88's should keep your engine fairly happy in it's hp/torque range, especially when cruising on the highway... imho.