235/65R17 vs 225/65R17Tire Size Comparison

Safe

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

235/65R17737mm dia225/65R17724mm dia-6.5mm

Comparison Details

Overall Diameter737.3 vs 724.3 mm (-13.0 mm)
Diameter Difference-1.76%
Section Width235 vs 225 mm (-10 mm)
Sidewall Height152.8 vs 146.3 mm (-6.5 mm)
Circumference2316.3 vs 2275.5 mm
Clearance Change-6.5 mm
Speedometer Error-1.76%
Revs/Mile695 vs 707

Speedometer Correction

When switching from 235/65R17 to 225/65R17, your speedometer will differ from actual speed.

SpeedometerActual SpeedDifference
30 km/h29.5 km/h-0.5 km/h
40 km/h39.3 km/h-0.7 km/h
50 km/h49.1 km/h-0.9 km/h
60 km/h58.9 km/h-1.1 km/h
70 km/h68.8 km/h-1.2 km/h
80 km/h78.6 km/h-1.4 km/h
90 km/h88.4 km/h-1.6 km/h
100 km/h98.2 km/h-1.8 km/h
110 km/h108.1 km/h-1.9 km/h
120 km/h117.9 km/h-2.1 km/h
130 km/h127.7 km/h-2.3 km/h

Vehicles Using These Sizes

Vehicles with 235/65R17

Vehicles with 225/65R17

Individual Tire Size Details

Practical Guidance

Switching from 235/65R17 to 225/65R17 is within the industry-accepted 3% diameter tolerance. Your speedometer, ABS, and traction control should function normally. Both sizes fit the same 17-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 -1.76%, width changes by -10mm.

Speedometer error will be -1.76%. At an indicated 100 km/h, actual speed is about 98.2 km/h.

Ground clearance changes by -6.5mm per side.