A 265/30R19 tire is 25.3″ tall and 10.4″ wide, and fits a 19″ wheel. In inches it is written 25.3×10.4R19.
Heights published by Michelin and Toyo for all 7 tires in this size. Their published revolutions per mile work out to 24.5–25.0″ under load (below).
Real 265/30R19 tires measure 25.30–25.79″, against 25.26″ from the size code. Every one runs taller than the size code.
Published revs per mile (806–822) mean the tire rolls like a 24.5–25.0″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Michelin Pilot Alpin 5, XL) is 6.1 lb lighter per corner than the heaviest (Toyo Proxes Sport A/S, XL).
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Michelin Pilot Alpin 5Winter | XL · 93W | 25.31 | 22.1 | 9.5 | 1,433 | 822 | Spec page |
| Michelin Pilot Sport Cup 2 ConnectPerformance | XL · 93(Y) | 25.30 | 22.8 | 7.2 | 1,433 | 822 | Spec page |
| Michelin Pilot Sport Cup 2 ConnectPerformance | XL · 93(Y) | 25.30 | 23.4 | 7.2 | 1,433 | 822 | Spec page |
| Michelin Pilot Sport 4 SPerformance | XL · 93(Y) | 25.30 | 24.5 | 9.5 | 1,433 | 822 | Spec page |
| Michelin Pilot Sport 4 SPerformance | XL · 93(Y) | 25.30 | 25.1 | 9.0 | 1,433 | 822 | Spec page |
| Toyo Proxes R888RPerformance | XL · 93Y | 25.31 | 27.1 | 6.3 | 1,433 | 821 | Spec page |
| Toyo Proxes Sport A/SPerformance | XL · 93Y | 25.79 | 28.2 | 9.6 | 1,433 | 806 | Spec page |
Close. The size code works out to 25.26″, and the 7 tires here publish 25.30–25.79″, so people call it a 25.
Differences in overall diameter, calculated from each size code.
A percentage, not a measurement: the sidewall is 30% as tall as the tire is wide, which is 79.5 mm or 3.13 inches.
Radial construction.
Mounts on a 19-inch wheel. Approved wheel widths run 9.0″ to 10.0″.
Each tire carries up to 1,433 lb (650 kg) at its maximum pressure.
Rated for up to 186 mph sustained.
Printed after the size.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 25.26 | 642 mm |
| Section width | 10.43 | 265 mm |
| Sidewall height | 3.13 | 79.5 mm |
| Circumference | 79.4 | 2,016 mm |
| Revolutions per mile (calculated, unloaded) | 798.4 | 496 per km |
| Revolutions per mile (published by manufacturers) | 806–822 | 501–511 per km |
| Approved wheel width | 9.0–10.0 | 229–254 mm |
25.26 inches tall, 10.43 inches wide, on a 19-inch wheel. Written in inches, that is roughly 25.3×10.4R19.
Between 22.1 lb and 28.2 lb for the 7 tires listed here. The lightest is the Michelin Pilot Alpin 5 (XL); the heaviest is the Toyo Proxes Sport A/S (XL).
Manufacturers approve 9.0–10.0″ wide wheels for this size.
Published figures run 806–822 revolutions per mile. The calculated figure is 798.4, but manufacturers measure the tire under load, where it rolls on a smaller radius.
0.06 inches taller on paper (25.26″ vs 25.20″), which raises the axle about 0.03″. Your speedometer will read about 0.2% slow.