185/55R16 vs 195/55R16Tire Size Comparison

Safe

The 1.8% diameter difference is within the accepted 3% tolerance.

185/55R16610mm dia195/55R16621mm dia+5.5mm

Comparison Details

Overall Diameter609.9 vs 620.9 mm (+11.0 mm)
Diameter Difference+1.80%
Section Width185 vs 195 mm (+10 mm)
Sidewall Height101.8 vs 107.3 mm (+5.5 mm)
Circumference1916.1 vs 1950.6 mm
Clearance Change+5.5 mm
Speedometer Error+1.80%
Revs/Mile840 vs 825

Speedometer Correction

When switching from 185/55R16 to 195/55R16, your speedometer will differ from actual speed.

SpeedometerActual SpeedDifference
30 km/h30.5 km/h+0.5 km/h
40 km/h40.7 km/h+0.7 km/h
50 km/h50.9 km/h+0.9 km/h
60 km/h61.1 km/h+1.1 km/h
70 km/h71.3 km/h+1.3 km/h
80 km/h81.4 km/h+1.4 km/h
90 km/h91.6 km/h+1.6 km/h
100 km/h101.8 km/h+1.8 km/h
110 km/h112.0 km/h+2.0 km/h
120 km/h122.2 km/h+2.2 km/h
130 km/h132.3 km/h+2.3 km/h

Individual Tire Size Details

185/55R16
Full specifications, compatible vehicles, and alternatives
195/55R16
Full specifications, compatible vehicles, and alternatives

Practical Guidance

Switching from 185/55R16 to 195/55R16 is within the industry-accepted 3% diameter tolerance. Your speedometer, ABS, and traction control should function normally. Both sizes fit the same 16-inch rim, so no wheel change is needed.

The 3% diameter tolerance is a widely accepted industry guideline referenced by the ETRTO and most vehicle manufacturers. When in doubt, consult your vehicle's owner's manual or a qualified tire professional. For U.S. tire safety standards and recalls, see the NHTSA Tire Safety page.

Frequently Asked Questions

Safe. The overall diameter differs by 1.80%, width changes by 10mm.

Speedometer error will be 1.80%. At an indicated 100 km/h, actual speed is about 101.8 km/h.

Ground clearance changes by +5.5mm per side.