205/65R16 vs 215/55R16
New overall diameter
25.31″
was 26.49″
True speed at an indicated 60
57.3 mph
your speedo reads high
Revolutions per mile
797
was 761, +36
| Measurement | 205/65R16 | 215/55R16 | Change |
|---|---|---|---|
| Overall diameter | 26.49″ | 25.31″ | −1.18″ (−4.5%) |
| Sidewall height | 5.25″ (133.3 mm) | 4.66″ (118.3 mm) | −15.0 mm |
| Tread width | 205 mm | 215 mm | +10 mm |
| Circumference | 83.23″ | 79.52″ | −3.71″ |
| Revs per mile | 761 | 797 | +36 |
| Speedometer error | baseline | −4.5% | reads high |
Diameter overlay
205/65R16 215/55R16
Speedometer check
With 215/55R16 fitted, when the speedometer shows the indicated speed, your actual speed is:
25 mph shown
23.9 mph actual
35 mph shown
33.4 mph actual
45 mph shown
43.0 mph actual
55 mph shown
52.5 mph actual
65 mph shown
62.1 mph actual
75 mph shown
71.7 mph actual
Common questions
- Will 215/55R16 fit instead of 205/65R16?
- Overall diameter changes 4.5%; section width changes 10 mm. Diameter comparison alone cannot confirm fitment. Verify the vehicle maker's approved rim width, tire load and speed ratings, and clearance at full steering lock and suspension compression. Confirm any possible ABS, traction-control, speedometer, and drivetrain effects with the vehicle maker or a qualified tire professional. Overall diameter goes from 26.49″ to 25.31″, a change of −4.5%. The rule of thumb most shops use: under 3% is fine, 3 to 5% needs a clearance check, over 5% needs recalibration.
- How far off will my speedometer read on 215/55R16?
- At an indicated 60 mph you are really doing about 57.3 mph, a −4.5% error. The speedometer reads high, so you are going slower than it shows.
- What is the difference in revolutions per mile between 205/65R16 and 215/55R16?
- 205/65R16 turns about 761 times per mile and 215/55R16 turns about 797, a difference of +36. Your speedometer and odometer both count rotations, so this number is what throws them off.