Tire Size Comparison
Compare two tire sizes in 3D. See how diameter, width, speedometer accuracy, and ground clearance change — with smart alternative recommendations from our OEM database.
Find Your Vehicle
(optional — enables OEM size recommendations)Quick comparisons
Currently on your vehicle
Considering switching to
Tire Size Visualizer
Front / Tread View
Side / Face View
Good match
Different rim size — you'll need new wheels.
Speedometer Impact
98.0 km/h
shown on speedo at actual 100 km/h
Speed reference table
Actual
50
Speedo shows
49.0
Actual
80
Speedo shows
78.4
Actual
100
Speedo shows
98.0
Actual
120
Speedo shows
117.6
Your speedometer will read 2.0 km/h higher than your actual speed.
Detailed Comparison
| Measurement | 225/65R17 | 235/60R18 | Difference |
|---|---|---|---|
| Overall Diameter | 724.3 mm | 739.2 mm | +14.9 mm |
| Section Width | 225 mm | 235 mm | +10.0 mm |
| Sidewall Height | 146.3 mm | 141.0 mm | -5.3 mm |
| Circumference | 2275 mm | 2322 mm | +2.1% |
| Revolutions / km | 439.5 | 430.6 | -8.9 |
| Rim Diameter | 17″ | 18″ | +1″ |
| Ground Clearance | — | — | +7.5 mm |
| Speedometer Error | 100.0 km/h | 98.0 km/h | -2.0% |
What Changes?
Firmer ride
Less sidewall means sharper handling but stiffer ride
More grip
Wider contact patch improves traction
More ground clearance
+7 mm
New wheels needed
Different rim diameter — you'll need new rims
Found your size?
Browse tires in your new size and compare prices at local Calgary shops.