Tire size in inches and millimeters

235/65R16 tire size in inches

A 235/65R16 tire is 28.03 inches tall (711.9 mm) and 9.25 inches wide (235 mm), with a 6.01-inch sidewall (152.8 mm). In inch notation that is about 28.0x9.3R16, close to a 28-inch tire (nominal).

Its circumference is 88.05 inches (2,236.5 mm), or about 720 revolutions per mile.

Nominal 235/65R16 dimensions

Overall diameter
28.03 in711.9 mm
Section width
9.25 in235 mm
Sidewall height
6.01 in152.8 mm
Circumference
88.05 in2,236.5 mm
Rim diameter
16 in
Revolutions per mile
720nominal, from geometric circumference
Inch notation
28.0x9.3R16approximate

Where 235/65R16 fits

  • Inch class: 28.03 in is within 0.1 in of a true 28 inches, so the 28-inch label is close to exact.
  • Profile: the 16-inch rim plus two 6.01 in sidewalls make up the overall diameter, and the sidewalls are 43% of it. At 65 series that is a tall profile: the extra sidewall absorbs more of each bump and flexes more in corners.
  • Same 16-inch rim: the next taller catalog size is 225/70R16 (28.40 in, +1.33%) and the next shorter is 215/70R16 (27.85 in, -0.63%).
  • Same 235 mm width: the closest in diameter are 235/55R17 (27.18 in, -3.03%), 235/50R18 (27.25 in, -2.77%), 235/70R15 (27.95 in, -0.27%), 235/75R15 (28.88 in, +3.03%). 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, 65 is the sidewall height as a percentage of that width, and R16 means radial construction for a 16-inch rim. Percentages are measured from 235/65R16.

Similar sizes on other rim diameters

Within 3% of 235/65R16's overall diameter, nearest first. The speed column is the actual speed when a speedometer calibrated for 235/65R16 reads 60 mph.

Catalog tire sizes on other rim diameters with an overall diameter close to 235/65R16
SizeOverall diameterDiameter changeAt 60 mph indicatedCompare
215/65R1728.00 in-0.08%59.95 mphNo comparison page
235/70R1527.95 in-0.27%59.84 mphNo comparison page
225/75R1528.29 in+0.93%60.56 mphComparison page for 235/65R16 vs 225/75R15
265/35R2128.30 in+0.98%60.59 mphNo comparison page
265/40R2028.35 in+1.14%60.68 mphNo comparison page
215/75R1527.70 in-1.18%59.29 mphNo comparison page

For a size without a comparison page, open 235/65R16 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 235/65R16 as the current tire and 225/75R15, the published comparison closest in overall diameter, as the proposed tire. Change either size; wheel details stay unknown until you supply them.

Compare 235/65R16 with 225/75R15 in the calculator

Compare 235/65R16 with any size

None keeps the 16-inch rim; each one changes wheel diameter. Diameter changes are measured from 235/65R16.

Smaller wheels

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.