235/70R17 vs 265/65R17
265/65R17 is 2.0% taller (+0.61 in) and 1.18 in wider than 235/70R17.
265/65R17 is 2.0% taller than 235/70R17. That is inside the ±3% most shops treat as a straight swap.
Real speed on 265/65R17.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 265/65R17 tires
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235/70R17 or 265/65R17?
Can I use 265/65R17 instead of 235/70R17?
265/65R17 is 2.0% taller than 235/70R17. That is inside the ±3% most shops treat as a straight swap. 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 265/65R17 you are really doing 61.2 mph if the speedometer was set up for 235/70R17. Going the other way, 235/70R17 would make it read 58.8 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.31 in (+8 mm) under the axle.