255/70R18 vs 255/75R17
255/75R17 is 0.0% taller (+0.00 in) and the same width than 255/70R18.
255/75R17 and 255/70R18 are the same overall diameter, so the speedometer stays accurate.
Real speed on 255/75R17.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 255/75R17 tires
Opens the store’s own searchPrices and stock change often, so check a few stores. We don’t earn anything from these links.
255/70R18 or 255/75R17?
Can I use 255/75R17 instead of 255/70R18?
255/75R17 and 255/70R18 are the same overall diameter, so the speedometer stays accurate. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.
Will my speedometer be off?
At an indicated 60 mph on 255/75R17 you are really doing 60.0 mph if the speedometer was set up for 255/70R18. Going the other way, 255/70R18 would make it read 60.0 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.00 in (+0 mm) under the axle.