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Same 20 in wheel · side by side

275/55R20 vs 285/55R20

First size

mm, 115–395
% of width
inches

Second size

mm, 115–395
% of width
inches

Comparing 275/55R20 · 285/55R20. Change any field and both follow.

Difference in overall diameter

+1.36%

285/55R20 is 0.43 in taller than 275/55R20 (+1.36%) and 0.39 in wider; at an indicated 60 mph you are doing 60.8 mph.

275/55R20 and 285/55R20 laid over each other at one scale, with the gap enlargedTwo circles drawn at one scale and sharing a center: the solid ring is 275/55R20 at 31.91 in overall, the dashed ring is 285/55R20 at 32.34 in. A detail view beside them shows the same two edges enlarged, with the gap between them dimensioned at 0.43 in.0.43 inDETAIL — ENLARGED275/55R20 · 31.91 in285/55R20 · 32.34 in
Both overall diameters at one scale, sharing a center. The detail beside them enlarges the one place they differ, and its dimension is the difference the table below states.

The difference, one row at a time

275/55R20 and 285/55R20, one measurement per row; the difference is 285/55R20 minus 275/55R20
Measure­ment 275/55R20 285/55R20 Differ­ence
Overall diameter31.91 in32.34 in+0.43 in · +1.36%
Section width10.83 in11.22 in+0.39 in
Sidewall height5.95 in6.17 in+0.22 in
Circumference100.25 in101.61 in+1.36 in
Revolutions per mile632.0623.6−8.5

Other pairs with one of these two in them

Each size on its own