The 275/55R20 is a common tire size for SUVs and crossovers such as Toyota RAV4, Honda CR-V, and Ford Explorer.
With a 151.3 mm sidewall (55% aspect ratio), this tire offers a balanced blend of ride comfort and handling precision — versatile for both city driving and spirited cornering.
Compared to the baseline 265/50R20, this tire's overall diameter differs by +4.9% — a speedometer calibrated for 265/50R20 would read 95.4 km/h at an actual 100 km/h.
OE on the Toyota Tundra (2015+ X-Series 20" wheels uniformly use this size), Ford F-150 Lariat and GMC Sierra 1500 Denali model years from 2007+. Load index 113H-113T in P-metric; 117T in LT load range E. Premium-truck staple — both highway and A-T patterns broadly stocked.
Large-rim luxury-SUV sizes prioritize acoustic refinement and curb-weight load capacity over off-road versatility. Self-sealing and runflat constructions are common OE on these fitments; replacing a runflat with a conventional tire requires confirming the TPMS module and spare-tire provisioning since most platforms ship without a spare. Air-suspension calibration is also tied to rolling diameter — staying within ±1% of OE is recommended on Range Rover and BMW X5/X7 platforms.
| Tire Code | 275/55R20 |
| Section Width | 275 mm |
| Aspect Ratio | 55% |
| Rim Diameter | 20" |
| Sidewall Height | 151.3 mm |
| Overall Diameter | 810.5 mm / 31.91" |
| Circumference | 2546.3 mm / 100.25" |
| Revolutions per km | 392.7 |
| Revolutions per mile | 632.0 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 275/45R20 | 755.5 | -55.0 | -6.8% | 107.3 |
| 235/55R20 | 766.5 | -44.0 | -5.4% | 105.7 |
| 275/55R20 (current) | 810.5 | — | — | 100.0 |