TireSizesFinder

215/85R16 vs 235/85R16

235/85R16 is 1.34 in (34.0 mm) taller than 215/85R16, a +4.40% diameter difference. With the speedometer set for 215/85R16, an indicated 60 mph is 62.6 mph on 235/85R16.

Is this a safe swap?

Diameter difference +4.40%: outside the ±3% guideline

By overall diameter alone, 235/85R16 falls outside the ±3% range commonly used as a guideline when replacing 215/85R16; speedometer and ride-height changes are larger. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 215/85R16 (30.39 in) vs 235/85R16 (31.73 in)215/85R1630.39 in × 8.46 in235/85R1631.73 in × 9.25 in
Side profile and tread width, drawn to the same scale.
215/85R16 vs 235/85R16 differences
Measurement215/85R16235/85R16Difference% diff
Overall diameter30.39 in (771.9 mm)31.73 in (805.9 mm)+1.34 in (+34.0 mm)+4.40%
Sidewall height7.19 in (182.8 mm)7.86 in (199.8 mm)+0.67 in (+17.0 mm)+9.30%
Section width8.46 in (215.0 mm)9.25 in (235.0 mm)+0.79 in (+20.0 mm)+9.30%
Circumference95.47 in (2,425.0 mm)99.68 in (2,531.8 mm)+4.21 in (+106.8 mm)+4.40%
Revolutions per mile664636−28−4.22%
True speed with the speedometer calibrated for 215/85R16
IndicatedActual on 215/85R16Actual on 235/85R16Difference
30 mph30.0 mph31.3 mph+1.3 mph
60 mph60.0 mph62.6 mph+2.6 mph
75 mph75.0 mph78.3 mph+3.3 mph

Ride-height change: 235/85R16 raises the vehicle by 0.67 in (17.0 mm) at the axle (half the +34.0 mm diameter difference).

235/85R16 is 1.34 in taller than 215/85R16 and 20 mm wider, a 4.40% difference in overall diameter.

With the speedometer calibrated for 215/85R16, an indicated 60 mph is actually 62.6 mph on 235/85R16, and revolutions per mile change from 664 to 636.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 215/85R16

Other comparisons with 235/85R16

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