Changing Tires

determine

I have a 96 F-250 PSD auto with a 3.55 rear end and BFG 285/75/16D's. I tow 10-12K on the bumper and hardly know it's there. You better check closely to see if you can get a 295 on the rear without them rubbing each other. Keep in mind that each time the tire flexes, the sidewalls move toward each other.

I believe his truck is SRW.

: > I have a 2004 F350 crew cab 4WD Powerstroke. It comes with 3.73 : > differentials. It also came with stock (wimpy looking) 265/75R16 : tires : > (Pirelli Scorpian STRA). Actually the tires seem pretty nice, but are : > obviously road tires and just "look" small on the truck. I am looking : at : > going to 295/75R16 - either the load range D BFG All Terrains which : have the : > same load capacity as the 265 load range E or to the Bridgestone : Revo's : > (cause they are great tires). : >

: > My question is this: Changing the tire diameter effectively changes : my : > differential ratios from 3.73 to 3.55 Does anyone know how to : determine : > how much this is going to change my towing capacity? Is there some : formula : > out there or such? I don't want to go through the trouble and expence : of : > change the differential ratios. : >

: > Thanks for your ideas. : >

: > Don : >

: >

: : I have a 96 F-250 PSD auto with a 3.55 rear end and BFG 285/75/16D's. I : tow 10-12K on the bumper and hardly know it's there. You better check : closely to see if you can get a 295 on the rear without them rubbing : each other. Keep in mind that each time the tire flexes, the sidewalls : move toward each other. : :

This is just a layman's casual response. You are losing about 4.5% in torque. So, if you are pulling maximum loads, you will feel the difference. Otherwise, probably not a big deal.

Never Forget

Just wanted to say thanks for all the information and suggestions. Mellowed had a great point, I'm only loosing 4.6%! Plus the new effective 3.55 ratio should boost my fuel milage when running unloaded. Thanks again.

Don

Uhhh...

a simple goole search returned what you are looking for:

DUAL DESIGNS, INC.

Russ