switch from 265 to 285 tires
Hi, I have a 2006 chevy Silverado 2500 4x4 (stock height) that currently has 265/75/16 tires (stock is 245/75/16). I am thinking of going with 285/75/16 tires. I am wondering if they will fit the stoc...
Forum Discussion
ScottG wrote:
I made that exact change and it screwed up my gearing bad.
I was thinking about this too! If one has 4.10s, you go from a 245 size as noted to a 265, you've effectively lowered the ratio to a 3.95. A 285 to a 3.73. If starting at a 3.73...> 3.55 @ 3.42 effective ratio. A gear change @ 1500 per pumpkin if an 8 lug gets pretty pricy.
My 88 with a th400 3.73 gears was noticeably worst. My 96 6.5rd with 4.10s and 5 sp manual imho made it a bit better...still noticed some initial loss of power on take off. A bit better rpm on freeway.
Marty
