Skip to main content
Tire Size Comparison

265/40R22 vs 295/35R21

Switching from 265/40R22 to 295/35R21 changes overall diameter by -4.01% (30.35 in → 29.13 in).

-4.01%Borderline — noticeable speedometer/odometer error

Speedometer error

With a speedometer calibrated to 265/40R22, fitting 295/35R21 makes it read as follows:

Speedo showsTrue speedSpeedo showsTrue speed
40 km/h38.4 km/h25 mph24 mph
60 km/h57.6 km/h37 mph36 mph
80 km/h76.8 km/h50 mph48 mph
100 km/h96.0 km/h62 mph60 mph
120 km/h115.2 km/h75 mph72 mph

Full comparison

265/40R22
Overall diameter770.8 mm · 30.35 in
Section width265 mm · 10.43 in
Sidewall height106.0 mm · 4.17 in
Circumference2421.5 mm · 95.3 in
Revolutions per mile665
Revolutions per km413
295/35R21
Overall diameter739.9 mm · 29.13 in
Section width295 mm · 11.61 in
Sidewall height103.3 mm · 4.06 in
Circumference2324.5 mm · 91.5 in
Revolutions per mile692
Revolutions per km430
Original tire
New tire
-4.01%Borderline — noticeable speedometer/odometer error
30.329.1
Original
Overall diameter770.8 mm · 30.35 in
Sidewall height106 mm
Circumference2,421.5 mm
Revolutions / mile664.6
New
Overall diameter739.9 mm · 29.13 in
Sidewall height103.3 mm
Circumference2,324.5 mm
Revolutions / mile692.4
Speedometer & odometer error

The new tire changes overall diameter by -4.01%. With a speedometer calibrated to the original tire, that same percentage is how far the speedometer and odometer read off — a taller tire means your true speed is higher than indicated and the odometer under-counts distance.

Speedo showsTrue speedSpeedo showsTrue speed
40 km/h38.4 km/h25 mph24 mph
60 km/h57.6 km/h37 mph36 mph
80 km/h76.8 km/h50 mph48 mph
100 km/h96 km/h62 mph60 mph
120 km/h115.2 km/h75 mph72 mph

See individual specs: 265/40R22 · 295/35R21. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.