235/65R17 vs 235/70R17
235/70R17 is 3.2% taller (+0.93 in) and the same width than 235/65R17.
235/70R17 is 3.2% taller than 235/65R17. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.
Real speed on 235/70R17.
Change in height under the axle.
On the same wheel, split inboard and outboard.
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235/65R17 or 235/70R17?
Can I use 235/70R17 instead of 235/65R17?
235/70R17 is 3.2% taller than 235/65R17. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock. 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 235/70R17 you are really doing 61.9 mph if the speedometer was set up for 235/65R17. Going the other way, 235/65R17 would make it read 58.1 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.46 in (+12 mm) under the axle.