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Same 20 in wheel · side by side

275/60R20 vs 285/55R20

First size

mm, 115–395
% of width
inches

Second size

mm, 115–395
% of width
inches

Comparing 275/60R20 · 285/55R20. Change any field and both follow.

Difference in overall diameter

−1.97%

285/55R20 is 0.65 in shorter than 275/60R20 (−1.97%) and 0.39 in wider; at an indicated 60 mph you are doing 58.8 mph.

275/60R20 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 275/60R20 at 32.99 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 0.65 in.0.65 inDETAIL — ENLARGED275/60R20 · 32.99 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

275/60R20 and 285/55R20, one measurement per row; the difference is 285/55R20 minus 275/60R20
Measure­ment 275/60R20 285/55R20 Differ­ence
Overall diameter32.99 in32.34 in−0.65 in · −1.97%
Section width10.83 in11.22 in+0.39 in
Sidewall height6.50 in6.17 in−0.32 in
Circumference103.65 in101.61 in−2.04 in
Revolutions per mile611.3623.6+12.3

Other pairs with one of these two in them

Each size on its own