205/70R15 vs 215/65R16Tire Size Comparison

Safe

The 2.7% diameter difference is within the accepted 3% tolerance.

205/70R15668mm dia215/65R16686mm dia+8.9mm

Comparison Details

Overall Diameter668.0 vs 685.9 mm (+17.9 mm)
Diameter Difference+2.68%
Section Width205 vs 215 mm (+10 mm)
Sidewall Height143.5 vs 139.8 mm (-3.7 mm)
Circumference2098.6 vs 2154.8 mm
Clearance Change+8.9 mm
Speedometer Error+2.68%
Revs/Mile767 vs 747

Speedometer Correction

When switching from 205/70R15 to 215/65R16, your speedometer will differ from actual speed.

SpeedometerActual SpeedDifference
30 km/h30.8 km/h+0.8 km/h
40 km/h41.1 km/h+1.1 km/h
50 km/h51.3 km/h+1.3 km/h
60 km/h61.6 km/h+1.6 km/h
70 km/h71.9 km/h+1.9 km/h
80 km/h82.1 km/h+2.1 km/h
90 km/h92.4 km/h+2.4 km/h
100 km/h102.7 km/h+2.7 km/h
110 km/h112.9 km/h+2.9 km/h
120 km/h123.2 km/h+3.2 km/h
130 km/h133.5 km/h+3.5 km/h

Individual Tire Size Details

Practical Guidance

Switching from 205/70R15 to 215/65R16 is within the industry-accepted 3% diameter tolerance. Your speedometer, ABS, and traction control should function normally. Note: these sizes require different rim diameters (15" vs 16"), so you will need different wheels.

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 2.68%, width changes by 10mm.

Speedometer error will be 2.68%. At an indicated 100 km/h, actual speed is about 102.7 km/h.

Ground clearance changes by +8.9mm per side.