Tire RulerWhat changes when you switch to 245/75R16
- Height: +0.59″ (+2.0%), so ground clearance at the axle goes up 0.30″.
- Width: +0.39″ (10 mm). Check inner clearance to the suspension and frame, and the fender liner at full lock.
- Sidewall: +0.30″. A taller sidewall rides a bit softer and protects the wheel off-road.
- Revolutions per mile: 675 → 662. Your gears act about 2.0% taller; at 65 mph in a 0.69 top gear with 3.73s, that’s 1,882 → 1,846 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 245/75R16 than 235/75R16?
245/75R16 is 0.59 inches (2.0%) taller and 0.39 inches wider: 30.5" × 9.6" versus 29.9" × 9.3".
Will 245/75R16 change my speedometer?
Yes, by 2.0%. Going from 235/75R16 to 245/75R16, an indicated 60 mph is about 61.2 mph.
Can I replace 235/75R16 with 245/75R16?
Often, yes: the height difference is within the ±3% most tire shops accept. Both fit a 16" wheel; confirm the rim width, load index and clearance for your vehicle.
Do I need to regear going from 235/75R16 to 245/75R16?
Usually not for a 2.0% change. With 3.73 gears, the 245/75R16 acts like 3.66.