Tire RulerWhat changes when you switch to 265/60R18
- Height: +0.94″ (+3.2%), so ground clearance at the axle goes up 0.47″.
- Width: +0.79″ (20 mm). Check inner clearance to the suspension and frame, and the fender liner at full lock.
- Sidewall: +0.47″. A taller sidewall rides a bit softer and protects the wheel off-road.
- Revolutions per mile: 682 → 661. Your gears act about 3.2% taller; at 65 mph in a 0.69 top gear with 3.73s, that’s 1,901 → 1,842 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.
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Frequently asked questions
How much bigger is 265/60R18 than 245/60R18?
265/60R18 is 0.94 inches (3.2%) taller and 0.79 inches wider: 30.5" × 10.4" versus 29.6" × 9.6".
Will 265/60R18 change my speedometer?
Yes, by 3.2%. Going from 245/60R18 to 265/60R18, an indicated 60 mph is about 61.9 mph.
Can I replace 245/60R18 with 265/60R18?
Possibly, but the height difference is over 3%, so check clearance and plan to recalibrate the speedometer. Both fit an 18" wheel; confirm the rim width, load index and clearance for your vehicle.
Do I need to regear going from 245/60R18 to 265/60R18?
Usually not for a 3.2% change. With 3.73 gears, the 265/60R18 acts like 3.61.