Tire RulerWhat changes when you switch to 265/65R17
- Height: +0.06″ (+0.2%), so ground clearance stays practically the same.
- Width: +0.79″ (20 mm). Check inner clearance to the suspension and frame, and the fender liner at full lock.
- Sidewall: +0.03″. A taller sidewall rides a bit softer and protects the wheel off-road.
- Revolutions per mile: 661 → 660. Your gears act about 0.2% taller; at 65 mph in a 0.69 top gear with 3.73s, that’s 1,843 → 1,840 RPM.
Sizes are theoretical, from the sidewall code. The same size can differ by a few tenths of an inch between brands and tread patterns; check the maker’s spec sheet for the exact model.
Other comparisons
Frequently asked questions
How much bigger is 265/65R17 than 245/70R17?
265/65R17 is 0.06 inches (0.2%) taller and 0.79 inches wider: 30.6" × 10.4" versus 30.5" × 9.6".
Will 265/65R17 change my speedometer?
Yes, by 0.2%. Going from 245/70R17 to 265/65R17, an indicated 60 mph is about 60.1 mph.
Can I replace 245/70R17 with 265/65R17?
Often, yes: the height difference is within the ±3% most tire shops accept. Both fit a 17" wheel; confirm the rim width, load index and clearance for your vehicle.
Do I need to regear going from 245/70R17 to 265/65R17?
Usually not for a 0.2% change. With 3.73 gears, the 265/65R17 acts like 3.72.