Tires Size 285/40R18
Dimensions, specs, and every size 285/40R18 tire currently in stock
26.98"
685 mm · calculated
285 mm
11.22 inches
4.49"
114 mm · 40% profile
18"
457.2 mm
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285/40R18 Specifications
Read directly from the size code. Load index, speed rating, and rim width range vary by model.
| Specification | Imperial | Metric |
|---|---|---|
| Section width | 11.22 in | 285 mm |
| Aspect ratio | 40% | — |
| Sidewall height | 4.49 in | 114 mm |
| Overall diameter (calculated) | 26.98 in | 685 mm |
| Wheel / rim diameter | 18 in | 457.2 mm |
| Construction | Radial | — |
What does 285/40R18 mean?
Reading the code on your sidewall
285 mm
The distance from sidewall to sidewall across the tire's widest point.
40% profile
The sidewall stands 40% of the section width, which is 114 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.
285/40R18 Questions & Answers
Dimensions and fitment guidelines for size 285/40R18
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Toyo 225/40R18XL Toy Observe G3-ICE Studded 225/40R18
Gladiator Comp M/T LT295/65R20
Barkley Aphelios UHP 235/50ZR17
Toyo Extensa HP II 225/45R17
Sumitomo Touring Lst 215/60R16
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