275/60R20 vs 275/65R20
275/65R20 is 3.3% taller (+1.08 in) and the same width than 275/60R20.
275/65R20 is 3.3% taller than 275/60R20. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.
Real speed on 275/65R20.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 275/65R20 tires
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275/60R20 or 275/65R20?
Can I use 275/65R20 instead of 275/60R20?
275/65R20 is 3.3% taller than 275/60R20. 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 275/65R20 you are really doing 62.0 mph if the speedometer was set up for 275/60R20. Going the other way, 275/60R20 would make it read 58.1 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.54 in (+14 mm) under the axle.