tireheight.com295/40R21 in inches
A 295/40R21 tire is 30.3″ tall and 11.6″ wide, and fits a 21″ wheel. In inches it is written 30.3×11.6R21.
How tall 295/40R21 tires really are
Heights published by Michelin and Toyo for all 10 tires in this size. Their published revolutions per mile work out to 29.4″ under load (below).
Real 295/40R21 tires measure 30.28–30.30″, against 30.29″ from the size code. They run both taller and shorter than the size code.
Published revs per mile (686–687) mean the tire rolls like a 29.4″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Michelin Pilot Sport EV, XL) is 7.5 lb lighter per corner than the heaviest (Toyo OPEN COUNTRY Q/T, XL).
10 tires in 295/40R21
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Michelin Pilot Sport EVPerformance | XL · 111Y | 30.30 | 30.5 | 8.5 | 2,403 | 687 | Spec page |
| Michelin Pilot Sport All-Season 4Performance | XL · 111Y | 30.30 | 34.1 | 10.0 | 2,403 | 687 | Spec page |
| Michelin Pilot Sport All-Season 4Performance | XL · 111V | 30.30 | 35.9 | 9.0 | 2,403 | 687 | Spec page |
| Michelin Primacy Tour A/STouring | XL · 111V | 30.30 | 35.9 | 8.5 | 2,403 | 687 | Spec page |
| Michelin Pilot Sport 4 SUVPerformance | XL · 111Y | 30.30 | 36.0 | 9.5 | 2,403 | 687 | Spec page |
| Michelin Primacy Tour A/STouring | XL · 111V | 30.30 | 36.1 | 8.5 | 2,403 | 687 | Spec page |
| Michelin X-Ice SnowWinter | XL · 111H | 30.28 | 36.6 | 10.5 | 2,403 | 687 | Spec page |
| Toyo Celsius SportPerformance | XL · 111Y | 30.28 | 37.2 | 9.7 | 2,403 | 686 | Spec page |
| Toyo Proxes Sport 2Performance | XL · 111Y | 30.30 | 37.4 | 9.2 | 2,403 | 686 | Spec page |
| Toyo OPEN COUNTRY Q/TAll-season | XL · 111Y | 30.28 | 38.0 | 10.1 | 2,403 | 686 | Spec page |
Is 295/40R21 a 30-inch tire?
Yes. The size code works out to 30.29″, and the 10 tires here publish 30.28–30.30″, so people call it a 30.
All 30-inch tire sizes, on every wheel size.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
How to read 295/40R21
A percentage, not a measurement: the sidewall is 40% as tall as the tire is wide, which is 118.0 mm or 4.65 inches.
Radial construction.
Mounts on a 21-inch wheel. Approved wheel widths run 10.0″ to 11.5″.
Each tire carries up to 2,403 lb (1,090 kg) at its maximum pressure.
Rated for up to 186 mph sustained.
Printed after the size.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 30.29 | 769 mm |
| Section width | 11.61 | 295 mm |
| Sidewall height | 4.65 | 118.0 mm |
| Circumference | 95.2 | 2,417 mm |
| Revolutions per mile (calculated, unloaded) | 665.8 | 414 per km |
| Revolutions per mile (published by manufacturers) | 686–687 | 426–427 per km |
| Approved wheel width | 10.0–11.5 | 254–292 mm |
Speedometer error after switching to 295/40R21
Questions about 295/40R21
What is 295/40R21 in inches?
30.29 inches tall, 11.61 inches wide, on a 21-inch wheel. Written in inches, that is roughly 30.3×11.6R21.
How much does a 295/40R21 tire weigh?
Between 30.5 lb and 38.0 lb for the 10 tires listed here. The lightest is the Michelin Pilot Sport EV (XL); the heaviest is the Toyo OPEN COUNTRY Q/T (XL).
What wheel width do I need for 295/40R21?
Manufacturers approve 10.0–11.5″ wide wheels for this size.
How many revolutions per mile does a 295/40R21 make?
Published figures run 686–687 revolutions per mile. The calculated figure is 665.8, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 295/40R21 than 235/50R21?
0.04 inches taller on paper (30.29″ vs 30.25″), which raises the axle about 0.02″. Your speedometer will read about 0.1% slow.