Tires Size 275/45R21
Dimensions, specs, and every size 275/45R21 tire currently in stock
30.74"
781 mm · calculated
275 mm
10.83 inches
4.87"
123.8 mm · 45% profile
21"
533.4 mm
Showing 11 to 20 of 37 products
275/45R21 Specifications
Read directly from the size code. Load index, speed rating, and rim width range vary by model.
| Specification | Imperial | Metric |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Aspect ratio | 45% | — |
| Sidewall height | 4.87 in | 123.8 mm |
| Overall diameter (calculated) | 30.74 in | 781 mm |
| Wheel / rim diameter | 21 in | 533.4 mm |
| Construction | Radial | — |
What does 275/45R21 mean?
Reading the code on your sidewall
275 mm
The distance from sidewall to sidewall across the tire's widest point.
45% profile
The sidewall stands 45% of the section width, which is 123.8 mm on this size.
Radial
The body plies run across the tire at right angles to the direction of travel.
21 in
Fits a wheel measuring 21 inches across.
275/45R21 Questions & Answers
Dimensions and fitment guidelines for size 275/45R21
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