Originally Posted by Sahara33
Hello all, kinda new to this and would like your help. I have a 2011 Sahara Unlimited automatic. I went from 255/70/18 to 275/65/18. I do pull a waverunner trailer and on the beach. I do feel it as a little slugglish with the wider tires on. What is the factory ratio and what should i re gear to? Thoughts? Thanks much!
You shouldn't regear. At +/– $1500 for a regear, it's not worth it for the tire change you're making.
The "sluggishness" you feel is in your imagination, IMO.
Your 255's are 32.06" in diameter; the 275's are 32.07" The difference in your revs per mile is –0.39. Your speedometer change will be +.04.
The only way it could be more negligible is if you changed your old 275's to new ones of the exact same brand.
By the way...the difference in section width of your new tire is 0.79. It's like the difference in circumference between two hairs from the same head.
Don't waste the $$ on a gear change.