225/60R17 vs 305/35R19

305/35R19 is 0.22 in (5.7 mm) shorter than 225/60R17, a −0.81% diameter difference. With the speedometer set for 225/60R17, an indicated 60 mph is 59.5 mph on 305/35R19.

Is this a safe swap?

Diameter difference −0.81%: under 1%

By overall diameter alone, 305/35R19 is a near match for 225/60R17; 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.

225/60R17 vs 305/35R19 differences
Measurement	225/60R17	305/35R19	Difference	% diff
Overall diameter	27.63 in (701.8 mm)	27.41 in (696.1 mm)	−0.22 in (−5.7 mm)	−0.81%
Sidewall height	5.31 in (135.0 mm)	4.20 in (106.8 mm)	−1.11 in (−28.2 mm)	−20.93%
Section width	8.86 in (225.0 mm)	12.01 in (305.0 mm)	+3.15 in (+80.0 mm)	+35.56%
Circumference	86.80 in (2,204.8 mm)	86.10 in (2,186.9 mm)	−0.71 in (−17.9 mm)	−0.81%
Revolutions per mile	730	736	+6	+0.82%

True speed with the speedometer calibrated for 225/60R17
Indicated	Actual on 225/60R17	Actual on 305/35R19	Difference
30 mph	30.0 mph	29.8 mph	−0.2 mph
60 mph	60.0 mph	59.5 mph	−0.5 mph
75 mph	75.0 mph	74.4 mph	−0.6 mph

Ride-height change: 305/35R19 lowers the vehicle by 0.11 in (2.9 mm) at the axle (half the −5.7 mm diameter difference).

305/35R19 is 0.22 in shorter than 225/60R17 and 80 mm wider, a 0.81% difference in overall diameter.

With the speedometer calibrated for 225/60R17, an indicated 60 mph is actually 59.5 mph on 305/35R19, and revolutions per mile change from 730 to 736.

305/35R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 225/60R17.

Size pages

Other comparisons with 225/60R17

Other comparisons with 305/35R19

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