305/70R16 vs 295/70R17

295/70R17 is 0.45 in (11.4 mm) taller than 305/70R16, a +1.37% diameter difference. With the speedometer set for 305/70R16, an indicated 60 mph is 60.8 mph on 295/70R17.

Is this a safe swap?

Diameter difference +1.37%: within the ±3% guideline

By overall diameter alone, 295/70R17 falls inside the ±3% range commonly used as a guideline when replacing 305/70R16. 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.

305/70R16 vs 295/70R17 differences
Measurement	305/70R16	295/70R17	Difference	% diff
Overall diameter	32.81 in (833.4 mm)	33.26 in (844.8 mm)	+0.45 in (+11.4 mm)	+1.37%
Sidewall height	8.41 in (213.5 mm)	8.13 in (206.5 mm)	−0.28 in (−7.0 mm)	−3.28%
Section width	12.01 in (305.0 mm)	11.61 in (295.0 mm)	−0.39 in (−10.0 mm)	−3.28%
Circumference	103.08 in (2,618.2 mm)	104.49 in (2,654.0 mm)	+1.41 in (+35.8 mm)	+1.37%
Revolutions per mile	615	606	−8	−1.35%

True speed with the speedometer calibrated for 305/70R16
Indicated	Actual on 305/70R16	Actual on 295/70R17	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.8 mph	+0.8 mph
75 mph	75.0 mph	76.0 mph	+1.0 mph

Ride-height change: 295/70R17 raises the vehicle by 0.22 in (5.7 mm) at the axle (half the +11.4 mm diameter difference).

295/70R17 is 0.45 in taller than 305/70R16 and 10 mm narrower, a 1.37% difference in overall diameter.

With the speedometer calibrated for 305/70R16, an indicated 60 mph is actually 60.8 mph on 295/70R17, and revolutions per mile change from 615 to 606.

295/70R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 305/70R16.

Size pages

Other comparisons with 305/70R16

Other comparisons with 295/70R17

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