TireSizesFinder

205/65R16 vs 235/50R17

235/50R17 is 0.24 in (6.1 mm) shorter than 205/65R16, a −0.91% diameter difference. With the speedometer set for 205/65R16, an indicated 60 mph is 59.5 mph on 235/50R17.

Is this a safe swap?

Diameter difference −0.91%: under 1%

By overall diameter alone, 235/50R17 is a near match for 205/65R16; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 205/65R16 (26.49 in) vs 235/50R17 (26.25 in)205/65R1626.49 in × 8.07 in235/50R1726.25 in × 9.25 in
Side profile and tread width, drawn to the same scale.
205/65R16 vs 235/50R17 differences
Measurement205/65R16235/50R17Difference% diff
Overall diameter26.49 in (672.9 mm)26.25 in (666.8 mm)−0.24 in (−6.1 mm)−0.91%
Sidewall height5.25 in (133.3 mm)4.63 in (117.5 mm)−0.62 in (−15.7 mm)−11.82%
Section width8.07 in (205.0 mm)9.25 in (235.0 mm)+1.18 in (+30.0 mm)+14.63%
Circumference83.23 in (2,114.0 mm)82.47 in (2,094.8 mm)−0.75 in (−19.2 mm)−0.91%
Revolutions per mile761768+7+0.91%
True speed with the speedometer calibrated for 205/65R16
IndicatedActual on 205/65R16Actual on 235/50R17Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.5 mph−0.5 mph
75 mph75.0 mph74.3 mph−0.7 mph

Ride-height change: 235/50R17 lowers the vehicle by 0.12 in (3.1 mm) at the axle (half the −6.1 mm diameter difference).

235/50R17 is 0.24 in shorter than 205/65R16 and 30 mm wider, a 0.91% difference in overall diameter.

With the speedometer calibrated for 205/65R16, an indicated 60 mph is actually 59.5 mph on 235/50R17, and revolutions per mile change from 761 to 768.

235/50R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 205/65R16.

Size pages

Other comparisons with 205/65R16

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Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.