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155/65R13 vs 165/65R13

Side-by-side comparison of overall diameter, sidewall height, speedometer error, and ride-height change.

BorderlineCheck wheel-arch clearance and reset TPMS before fitting.

To scale

ground13.0 mm155/65R13531.7 mm165/65R13544.7 mm

155/65R13

Section width
155 mm
Aspect ratio
65%
Rim diameter
13"
Sidewall
100.8 mm
Overall diameter
531.7 mm
Circumference
1670 mm
Revs / mile
963
Revs / km
599

165/65R13

Section width
165 mm
Aspect ratio
65%
Rim diameter
13"
Sidewall
107.3 mm
Overall diameter
544.7 mm
Circumference
1711 mm
Revs / mile
940
Revs / km
584

Difference

Overall diameter
+13.0 mm (+2.44%)
Sidewall height
+6.5 mm
Tread width
+10 mm
Ride height (axle)
+6.5 mm
Speedometer error
+2.44%
At indicated 60 mph
actual 61.5 mph
At indicated 100 km/h
actual 102.4 km/h

Will 165/65R13 fit instead of 155/65R13?

The overall diameter changes by 2.44%. Most manufacturers consider a swap acceptable when the difference stays under 3% — beyond that, you may see speedometer error, ABS/TPMS warnings, or wheel-well clearance problems. This page only covers the math; your vehicle's wheel arches, suspension geometry, and load rating still matter.

What the numbers mean