LT235/85R16 Tire Size
LT235/85R16 diameter, sidewall, revolutions per mile, and plus-sizing options.
The LT235/85R16 tire size breaks down as: 235 mm section width, 85% aspect ratio, and a 16-inch rim. Below are its real, calculated dimensions.
LT235/85R16 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 31.7 in (806 mm) |
| Sidewall height | 7.9 in (200 mm) |
| Circumference | 99.7 in (2532 mm) |
| Revolutions per mile | 636 |
Typical Fitment
LT235/85R16 is most often found on three-quarter-ton pickups. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to LT235/85R16, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 245/80R16 | 31.43 in | -0.9% |
| 245/75R17 | 31.47 in | -0.8% |
| 255/70R18 | 32.06 in | +1.0% |
Speedometer Note
If you fit a 245/80R16 instead of LT235/85R16, the diameter changes by -0.9%. A taller tire makes your speedometer read low — at a true 60 mph it would show roughly 61 mph. A shorter tire has the opposite effect, so the gauge reads high.
Use the tire calculator to compare LT235/85R16 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does LT235/85R16 mean?
LT235/85R16 means a 235 mm wide tire with a 85% sidewall aspect ratio mounted on a 16-inch rim. The aspect ratio is the sidewall height as a percentage of the width.
Can I plus-size from LT235/85R16?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from LT235/85R16 are 245/80R16, 245/75R17, 255/70R18.
Will LT235/85R16 affect my speedometer?
Only if it differs in diameter from your original size. A taller tire reads low; a shorter tire reads high. Compare the two sizes with the calculator to find the percentage.