TireSizesFinder

205/65R16 vs 245/50R17

245/50R17 is 0.15 in (3.9 mm) taller than 205/65R16, a +0.58% diameter difference. With the speedometer set for 205/65R16, an indicated 60 mph is 60.3 mph on 245/50R17.

Is this a safe swap?

Diameter difference +0.58%: under 1%

By overall diameter alone, 245/50R17 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 245/50R17 (26.65 in)205/65R1626.49 in × 8.07 in245/50R1726.65 in × 9.65 in
Side profile and tread width, drawn to the same scale.
205/65R16 vs 245/50R17 differences
Measurement205/65R16245/50R17Difference% diff
Overall diameter26.49 in (672.9 mm)26.65 in (676.8 mm)+0.15 in (+3.9 mm)+0.58%
Sidewall height5.25 in (133.3 mm)4.82 in (122.5 mm)−0.42 in (−10.7 mm)−8.07%
Section width8.07 in (205.0 mm)9.65 in (245.0 mm)+1.57 in (+40.0 mm)+19.51%
Circumference83.23 in (2,114.0 mm)83.71 in (2,126.2 mm)+0.48 in (+12.3 mm)+0.58%
Revolutions per mile761757−4−0.58%
True speed with the speedometer calibrated for 205/65R16
IndicatedActual on 205/65R16Actual on 245/50R17Difference
30 mph30.0 mph30.2 mph+0.2 mph
60 mph60.0 mph60.3 mph+0.3 mph
75 mph75.0 mph75.4 mph+0.4 mph

Ride-height change: 245/50R17 raises the vehicle by 0.08 in (1.9 mm) at the axle (half the +3.9 mm diameter difference).

245/50R17 is 0.15 in taller than 205/65R16 and 40 mm wider, a 0.58% difference in overall diameter.

With the speedometer calibrated for 205/65R16, an indicated 60 mph is actually 60.3 mph on 245/50R17, and revolutions per mile change from 761 to 757.

245/50R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 205/65R16.

Size pages

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