Tires Size 255/70R18
Dimensions, specs, and every size 255/70R18 tire currently in stock
32.06"
814 mm · calculated
255 mm
10.04 inches
7.03"
178.5 mm · 70% profile
18"
457.2 mm
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255/70R18 Specifications
Read directly from the size code. Load index, speed rating, and rim width range vary by model.
| Specification | Imperial | Metric |
|---|---|---|
| Section width | 10.04 in | 255 mm |
| Aspect ratio | 70% | — |
| Sidewall height | 7.03 in | 178.5 mm |
| Overall diameter (calculated) | 32.06 in | 814 mm |
| Wheel / rim diameter | 18 in | 457.2 mm |
| Construction | Radial | — |
What does 255/70R18 mean?
Reading the code on your sidewall
255 mm
The distance from sidewall to sidewall across the tire's widest point.
70% profile
The sidewall stands 70% of the section width, which is 178.5 mm on this size.
Radial
The body plies run across the tire at right angles to the direction of travel.
18 in
Fits a wheel measuring 18 inches across.
255/70R18 Questions & Answers
Dimensions and fitment guidelines for size 255/70R18
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