What is the diameter difference between 295/30R22 and 295/35R22?

295/30R22 has an overall diameter of 28.97 inches (736 mm). 295/35R22 is 30.13 inches (765 mm). That's a 1.16 inch (30 mm) difference — 295/35R22 is taller.

Will 295/35R22 cause speedometer error on a car fitted with 295/30R22?

Swapping 295/30R22 for 295/35R22 produces a speedometer error of about 4%. Your speedometer will read lower than your actual speed — a 60 mph indicated reading is really 62.4 mph. Anything under 3% is usually acceptable without recalibration.

How many revolutions per mile does each size do?

295/30R22 turns 696 revs per mile. 295/35R22 turns 669 revs per mile. Taller tyres turn fewer times per mile, which lowers effective final-drive ratio.

What's the sidewall height difference?

295/30R22 has a sidewall of 89 mm (3.48 in). 295/35R22 sidewall is 103 mm (4.06 in). Lower-profile sidewalls give sharper steering response but less bump compliance.

Is 295/35R22 a safe plus-size upgrade from 295/30R22?

A plus-size upgrade is considered safe when overall diameter stays within ±3% — here the difference is 4%. This swap is outside the typical ±3% safe range and may require speedometer recalibration or affect ABS / traction control behaviour.

Tire size comparison

295/30R22 vs 295/35R22

Overall diameter, sidewall, revs per mile, and speedometer error — 295/35R22 is the taller tire, with a 4% speedo delta when swapping.

295/30R22

28.97in

736 mm overall diameter

295/35R22

30.13in

765 mm overall diameter

Diameter Δ

1.16 in

Speedo error

295/30R22 revs/mi

696

295/35R22 revs/mi

669

Outside the typical ±3% safe plus-size band — you may want speedometer recalibration, and this change can affect ABS or traction control behaviour.

Full spec

Side by side

Metric	295/30R22	295/35R22
Section width	295 mm	295 mm
Aspect ratio	30	35
Wheel diameter	22″	22″
Sidewall height	89 mm	103 mm
Overall diameter	28.97 in (736 mm)	30.13 in (765 mm)
Circumference	91.01 in	94.66 in
Revolutions / mile	696	669

Other comparisons for these sizes

295/35R21 vs 295/30R22 285/30R22 vs 295/30R22 285/35R22 vs 295/35R22 285/35R22 vs 295/30R22 295/30R22 vs 305/30R22 295/30R22 vs 315/30R22 295/35R22 vs 305/30R22

FAQ

Frequently asked

What is the diameter difference between 295/30R22 and 295/35R22?: 295/30R22 has an overall diameter of 28.97 inches (736 mm). 295/35R22 is 30.13 inches (765 mm). That's a 1.16 inch (30 mm) difference — 295/35R22 is taller.
Will 295/35R22 cause speedometer error on a car fitted with 295/30R22?: Swapping 295/30R22 for 295/35R22 produces a speedometer error of about 4%. Your speedometer will read lower than your actual speed — a 60 mph indicated reading is really 62.4 mph. Anything under 3% is usually acceptable without recalibration.
How many revolutions per mile does each size do?: 295/30R22 turns 696 revs per mile. 295/35R22 turns 669 revs per mile. Taller tyres turn fewer times per mile, which lowers effective final-drive ratio.
What's the sidewall height difference?: 295/30R22 has a sidewall of 89 mm (3.48 in). 295/35R22 sidewall is 103 mm (4.06 in). Lower-profile sidewalls give sharper steering response but less bump compliance.
Is 295/35R22 a safe plus-size upgrade from 295/30R22?: A plus-size upgrade is considered safe when overall diameter stays within ±3% — here the difference is 4%. This swap is outside the typical ±3% safe range and may require speedometer recalibration or affect ABS / traction control behaviour.