tire size

Bullet Proof · April 19, 2004

I have an 01 2500 HD, I have stick rims. I am wondering what is the biggest size tire I can put on this truck w/o having to worry about buying a programmer to adjust the speedo and everything else. Not looking to cut anything and don't want them to rub.

I am also looking at the BF goodrich AT and the Bridgestone duelers....any suggestions?

Buddaorf · April 19, 2004

Shooter posted this in another thread. Really good info.

Stock tires are 245 and will fit up to a 265 without a lift, as for times please see below for what he wrote.

TIRE #1 - 265/75R16

TIRE #2 - 245/75R16

Section Width: 10.43 in 265 mm

Section Width: 9.64 in 245 mm

Rim Diameter: 16 in 406.4 mm

RimDiameter: 16 in 406.4 mm

Rim Width Range: 7 - 8 in

Rim Width Range: 6.5 - 7.5 in

Overall Diameter: 31.64 in 803.65 mm

Overall Diameter: 30.46 in 773.68 mm

Sidewall Height: 7.82 in 198.62 mm

Sidewall Height: 7.23 in 183.64 mm

Radius: 15.82 in 401.82 mm

Radius: 15.23 in 386.84 mm

Circumference: 99.39 in 2524.5 mm

Circumference: 95.69 in 2430.5 mm

Revs per Mile: 657.3

Revs per Mile: 682.8

Speedometer1: 60 mph 100 km/h

Speedometer2: 62.3 mph 103. km/h

Speedometer Difference: 3.879% too fast Diameter Difference: 3.73%

Currently I run BFG AT 265 75 16 without any rubbing on a 2002 GMC 2500HD. I had sears try 285 and had minor rubbing, to reduce on wear I stuck with the 265s.

Chevyfreek · April 19, 2004

If you don't want to sdjust the computer for the new tires I would not go bigger than a 265. They will fit fine on the factory rims and no lift. Your speedo will be off a little though. Probably a 2-3 mph! I put 265's on my truck, but I also upgraded my Westers tune for the new tire size, adjusting the shift point and all that as well...