195/50R16 vs 215/40R17

215/40R17 is 0.09 in (2.4 mm) taller than 195/50R16, a +0.40% diameter difference. With the speedometer set for 195/50R16, an indicated 60 mph is 60.2 mph on 215/40R17.

Is this a safe swap?

Diameter difference +0.40%: under 1%

By overall diameter alone, 215/40R17 is a near match for 195/50R16; 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.

195/50R16 vs 215/40R17 differences
Measurement	195/50R16	215/40R17	Difference	% diff
Overall diameter	23.68 in (601.4 mm)	23.77 in (603.8 mm)	+0.09 in (+2.4 mm)	+0.40%
Sidewall height	3.84 in (97.5 mm)	3.39 in (86.0 mm)	−0.45 in (−11.5 mm)	−11.79%
Section width	7.68 in (195.0 mm)	8.46 in (215.0 mm)	+0.79 in (+20.0 mm)	+10.26%
Circumference	74.38 in (1,889.4 mm)	74.68 in (1,896.9 mm)	+0.30 in (+7.5 mm)	+0.40%
Revolutions per mile	852	848	−3	−0.40%

True speed with the speedometer calibrated for 195/50R16
Indicated	Actual on 195/50R16	Actual on 215/40R17	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.2 mph	+0.2 mph
75 mph	75.0 mph	75.3 mph	+0.3 mph

Ride-height change: 215/40R17 raises the vehicle by 0.05 in (1.2 mm) at the axle (half the +2.4 mm diameter difference).

215/40R17 is 0.09 in taller than 195/50R16 and 20 mm wider, a 0.40% difference in overall diameter.

With the speedometer calibrated for 195/50R16, an indicated 60 mph is actually 60.2 mph on 215/40R17, and revolutions per mile change from 852 to 848.

215/40R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 195/50R16.

Size pages

Other comparisons with 195/50R16

Other comparisons with 215/40R17

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