33x12.50R17 vs 295/70R17

295/70R17 is 0.26 in (6.6 mm) taller than 33x12.50R17, a +0.79% diameter difference. With the speedometer set for 33x12.50R17, an indicated 60 mph is 60.5 mph on 295/70R17.

Is this a safe swap?

Diameter difference +0.79%: under 1%

By overall diameter alone, 295/70R17 is a near match for 33x12.50R17; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

33x12.50R17 vs 295/70R17 differences
Measurement	33x12.50R17	295/70R17	Difference	% diff
Overall diameter	33.00 in (838.2 mm)	33.26 in (844.8 mm)	+0.26 in (+6.6 mm)	+0.79%
Sidewall height	8.00 in (203.2 mm)	8.13 in (206.5 mm)	+0.13 in (+3.3 mm)	+1.62%
Section width	12.50 in (317.5 mm)	11.61 in (295.0 mm)	−0.89 in (−22.5 mm)	−7.09%
Circumference	103.67 in (2,633.3 mm)	104.49 in (2,654.0 mm)	+0.82 in (+20.7 mm)	+0.79%
Revolutions per mile	611	606	−5	−0.78%

True speed with the speedometer calibrated for 33x12.50R17
Indicated	Actual on 33x12.50R17	Actual on 295/70R17	Difference
30 mph	30.0 mph	30.2 mph	+0.2 mph
60 mph	60.0 mph	60.5 mph	+0.5 mph
75 mph	75.0 mph	75.6 mph	+0.6 mph

Ride-height change: 295/70R17 raises the vehicle by 0.13 in (3.3 mm) at the axle (half the +6.6 mm diameter difference).

295/70R17 is 0.26 in taller than 33x12.50R17 and 23 mm narrower, a 0.79% difference in overall diameter.

With the speedometer calibrated for 33x12.50R17, an indicated 60 mph is actually 60.5 mph on 295/70R17, and revolutions per mile change from 611 to 606.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 33x12.50R17

Other comparisons with 295/70R17

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.