Most P38 tyre upgrades aim for 31", 32" or 33" tyres. This calculator shows the real diameter in both millimetres and inches.
P38 Tyre Size Calculator
Compare two tyre sizes (e.g. 255/85R16 vs 265/75R16) and see diameter, clearance and speedo error.
Baseline (OEM / current)
Common OEM: 255/65R16 (varies by market)
New size (candidate)
Popular upgrades: 265/75R16, 255/85R16, 235/85R16
Speedo example
Assumes your speedo is accurate on Tyre A.
Quick picks:
P38 notes
- Actual tyre diameter varies by brand, load, and pressure. Treat results as estimates.
- Large diameter increases gearing: slightly lower RPM on the highway, but slower acceleration.
- Rubbing depends on your setup (EAS height, bump stops, wheel offset, tyre width, and lift).
No comments:
Post a Comment