225/50R17 vs 225/55R17Tire Size Comparison

Use Caution

The 3.4% diameter difference exceeds 3% and may affect speedometer accuracy.

225/50R17657mm dia225/55R17679mm dia+11.3mm

Comparison Details

Overall Diameter656.8 vs 679.3 mm (+22.5 mm)
Diameter Difference+3.43%
Section Width225 vs 225 mm (0 mm)
Sidewall Height112.5 vs 123.8 mm (+11.3 mm)
Circumference2063.4 vs 2134.1 mm
Clearance Change+11.3 mm
Speedometer Error+3.43%
Revs/Mile780 vs 754

Speedometer Correction

When switching from 225/50R17 to 225/55R17, your speedometer will differ from actual speed.

SpeedometerActual SpeedDifference
30 km/h31.0 km/h+1.0 km/h
40 km/h41.4 km/h+1.4 km/h
50 km/h51.7 km/h+1.7 km/h
60 km/h62.1 km/h+2.1 km/h
70 km/h72.4 km/h+2.4 km/h
80 km/h82.7 km/h+2.7 km/h
90 km/h93.1 km/h+3.1 km/h
100 km/h103.4 km/h+3.4 km/h
110 km/h113.8 km/h+3.8 km/h
120 km/h124.1 km/h+4.1 km/h
130 km/h134.5 km/h+4.5 km/h

Vehicles Using These Sizes

Vehicles with 225/50R17

Vehicles with 225/55R17

Individual Tire Size Details

Practical Guidance

The 3.4% diameter difference between 225/50R17 and 225/55R17 exceeds the standard 3% tolerance. While physically possible, this change will cause noticeable speedometer error and may affect ABS and traction control calibration. Consult a tire professional before making this switch.

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

Use Caution. The overall diameter differs by 3.43%, width changes by 0mm.

Speedometer error will be 3.43%. At an indicated 100 km/h, actual speed is about 103.4 km/h.

Ground clearance changes by +11.3mm per side.