Tire size in inches and millimeters
235/75R16 tire size in inches
A 235/75R16 tire is 29.88 inches tall (758.9 mm) and 9.25 inches wide (235 mm), with a 6.94-inch sidewall (176.3 mm). In inch notation that is about 29.9x9.3R16, close to a 30-inch tire (nominal).
Its circumference is 93.86 inches (2,384.2 mm), or about 675 revolutions per mile.
Nominal 235/75R16 dimensions
- Overall diameter
- 29.88 in758.9 mm
- Section width
- 9.25 in235 mm
- Sidewall height
- 6.94 in176.3 mm
- Circumference
- 93.86 in2,384.2 mm
- Rim diameter
- 16 in
- Revolutions per mile
- 675nominal, from geometric circumference
- Inch notation
- 29.9x9.3R16approximate
Where 235/75R16 fits
- Inch class: 29.88 in is 0.12 in short of a true 30 inches, inside the 30-inch class (29.50 to 30.49 in).
- Profile: the 16-inch rim plus two 6.94 in sidewalls make up the overall diameter, and the sidewalls are 46% of it. At 75 series that is a very tall profile: the two sidewalls are close to half of the overall diameter.
- Same 16-inch rim: the next taller catalog size is 255/70R16 (30.06 in, +0.59%) and the next shorter is 245/70R16 (29.50 in, -1.25%).
- Same 235 mm width: the closest in diameter are 235/70R16 (28.95 in, -3.10%), 235/65R17 (29.03 in, -2.85%), 235/60R18 (29.10 in, -2.60%), 235/80R16 (30.80 in, +3.10%). At the same width, a different profile or rim changes sidewall height and overall diameter, not section width.
Reading the marking: 235 is the section width in millimeters, 75 is the sidewall height as a percentage of that width, and R16 means radial construction for a 16-inch rim. Percentages are measured from 235/75R16.
Similar sizes on other rim diameters
Within 3% of 235/75R16's overall diameter, nearest first. The speed column is the actual speed when a speedometer calibrated for 235/75R16 reads 60 mph.
| Size | Overall diameter | Diameter change | At 60 mph indicated | Compare |
|---|---|---|---|---|
| 275/60R17 | 29.99 in | +0.38% | 60.23 mph | No comparison page |
| 255/65R17 | 30.05 in | +0.58% | 60.35 mph | No comparison page |
| 275/35R22 | 29.58 in | -1.00% | 59.40 mph | No comparison page |
| 245/65R17 | 29.54 in | -1.13% | 59.32 mph | No comparison page |
| 265/35R22 | 29.30 in | -1.92% | 58.85 mph | No comparison page |
| 245/70R17 | 30.50 in | +2.10% | 61.26 mph | No comparison page |
For a size without a comparison page, open 235/75R16 in the calculator and enter that size as the proposed tire.
Important: These results compare nominal dimensions. They do not confirm vehicle fitment. Actual clearance varies by tire model, approved rim width, wheel construction, suspension, alignment, body tolerances, steering angle, load, and brake geometry. Verify load and speed ratings and physically test-fit the complete setup before driving.
Physical checks before changing size
- Approved rim-width range for the exact tire model
- Load index and speed rating equal to or greater than vehicle requirements
- Brake-caliper, hub, and wheel-fastener compatibility
- Fender, liner, suspension, and full-lock steering clearance
- Clearance at full compression and under expected load
- Alignment, tire pressure, and manufacturer guidance
- Professional inspection when variance or clearance is uncertain
Compare another setup
See diameter, speedometer, ride-height, and wheel-position changes.
The calculator opens with 235/75R16 as the current tire and 225/75R16, the published comparison closest in overall diameter, as the proposed tire. Change either size; wheel details stay unknown until you supply them.
Compare 235/75R16 with 225/75R16 in the calculatorPublished comparisons for 235/75R16
All keep the 16-inch rim. Diameter changes are measured from 235/75R16.
Same 16-inch rim
- 235/75R16 vs 225/75R16 -1.98% diameter
Size source and limits
Listed as a recorded tire size (source: NHTSA consumer-complaint records through May 2021, checked August 19, 2026; see methodology). A recorded size is not a safety, popularity, availability, or fitment rating.
Read the formulas and source policy. Read the editorial and corrections policy.