TireSizesFinder

265/45R19 vs 265/35R21

265/35R21 is 0.09 in (2.2 mm) shorter than 265/45R19, a −0.31% diameter difference. With the speedometer set for 265/45R19, an indicated 60 mph is 59.8 mph on 265/35R21.

Is this a safe swap?

Diameter difference −0.31%: under 1%

By overall diameter alone, 265/35R21 is a near match for 265/45R19; 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: 265/45R19 (28.39 in) vs 265/35R21 (28.30 in)265/45R1928.39 in × 10.43 in265/35R2128.30 in × 10.43 in
Side profile and tread width, drawn to the same scale.
265/45R19 vs 265/35R21 differences
Measurement265/45R19265/35R21Difference% diff
Overall diameter28.39 in (721.1 mm)28.30 in (718.9 mm)−0.09 in (−2.2 mm)−0.31%
Sidewall height4.69 in (119.3 mm)3.65 in (92.8 mm)−1.04 in (−26.5 mm)−22.22%
Section width10.43 in (265.0 mm)10.43 in (265.0 mm)0.00 in (0.0 mm)0.00%
Circumference89.19 in (2,265.4 mm)88.92 in (2,258.5 mm)−0.27 in (−6.9 mm)−0.31%
Revolutions per mile710713+2+0.31%
True speed with the speedometer calibrated for 265/45R19
IndicatedActual on 265/45R19Actual on 265/35R21Difference
30 mph30.0 mph29.9 mph−0.1 mph
60 mph60.0 mph59.8 mph−0.2 mph
75 mph75.0 mph74.8 mph−0.2 mph

Ride-height change: 265/35R21 lowers the vehicle by 0.04 in (1.1 mm) at the axle (half the −2.2 mm diameter difference).

265/35R21 is 0.09 in shorter than 265/45R19 and the same width, a 0.31% difference in overall diameter.

With the speedometer calibrated for 265/45R19, an indicated 60 mph is actually 59.8 mph on 265/35R21, and revolutions per mile change from 710 to 713.

265/35R21 mounts on a 21-inch wheel, a plus-2 fitment from the 19-inch wheel of 265/45R19.

Size pages

Other comparisons with 265/45R19

Other comparisons with 265/35R21

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