275/35R21 tire size
A 275/35R21 tire is 28.58 inches (725.9 mm) tall, 10.83 in (275 mm) wide and fits a 21-inch wheel. In inch notation it is roughly a 28.6x10.8R21 — a "29-inch" tire.
| Overall diameter | 28.58 in | 725.9 mm |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Sidewall height | 3.79 in | 96.3 mm |
| Circumference | 89.78 in | 2,280 mm |
| Revolutions | 705.7 per mile | 438.5 per km |
| Rim diameter | 21 in | 533.4 mm |
Compare 275/35R21 with another size
Alternative sizes on the same 21-inch wheel
Sizes in use within ±3 % of the overall diameter of 275/35R21:
Plus and minus sizes for 275/35R21
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 245/50R19 | Minus 2 (19 in) | 28.65 in | +0.23% |
| 275/45R19 | Minus 2 (19 in) | 28.74 in | +0.58% |
| 265/45R19 | Minus 2 (19 in) | 28.39 in | −0.66% |
| 295/40R19 | Minus 2 (19 in) | 28.29 in | −1.01% |
| 275/40R20 | Minus 1 (20 in) | 28.66 in | +0.29% |
| 245/45R20 | Minus 1 (20 in) | 28.68 in | +0.36% |
| 315/35R20 | Minus 1 (20 in) | 28.68 in | +0.36% |
| 305/35R20 | Minus 1 (20 in) | 28.41 in | −0.61% |
| 285/30R22 | Plus 1 (22 in) | 28.73 in | +0.54% |
| 295/30R22 | Plus 1 (22 in) | 28.97 in | +1.36% |
| 255/35R22 | Plus 1 (22 in) | 29.03 in | +1.57% |
| 305/30R22 | Plus 1 (22 in) | 29.20 in | +2.19% |
Vehicles approved with 275/35R21 tires
Models whose Swiss type approval lists 275/35R21 as a standard or optional size (2,321 approvals in total). Always check your own vehicle's placard or papers.
- BMW X3
- BMW X4
- Audi A8
- Porsche Panamera
- Audi RS6
- Audi RS7
- Bentley Conti
- Ferrari 12Cilindri
- Aston Martin DB12
- Audi S8
- Bentley Flying
- Aston Martin Vantage
- Bentley Continental
- Aston Martin Vanquish
- Lexus LC500
- Tesla Model Y
- Lexus LC500H
- Bentley Cont
- Hyundai Ioniq 5
- Genesis GV60
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.
Nearby 21-inch sizes
- 255/35R21 (−1.9%)
- 255/40R21 (+1.6%)
- 255/45R21 (+5.1%)
- 265/30R21 (−4.6%)
- 265/35R21 (−1.0%)
- 265/40R21 (+2.7%)
- 265/45R21 (+6.3%)
- 275/30R21 (−3.8%)
- 275/40R21 (+3.8%)
- 275/45R21 (+7.6%)
- 285/30R21 (−3.0%)
- 285/35R21 (+1.0%)
- 285/40R21 (+4.9%)
- 285/45R21 (+8.8%)
- 295/25R21 (−6.2%)
- 295/30R21 (−2.1%)
- 295/35R21 (+1.9%)
- 295/40R21 (+6.0%)
Reading the 275/35R21 size
- 275 — section width in millimetres (10.83 in).
- 35 — aspect ratio: the sidewall is 35 % of the width, 96.3 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 21 — fits a 21-inch diameter wheel.
The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.