Tires Size 315/40R18
Dimensions, specs, and every size 315/40R18 tire currently in stock
27.92"
709 mm · calculated
315 mm
12.4 inches
4.96"
126 mm · 40% profile
18"
457.2 mm
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315/40R18 Specifications
Read directly from the size code. Load index, speed rating, and rim width range vary by model.
| Specification | Imperial | Metric |
|---|---|---|
| Section width | 12.4 in | 315 mm |
| Aspect ratio | 40% | — |
| Sidewall height | 4.96 in | 126 mm |
| Overall diameter (calculated) | 27.92 in | 709 mm |
| Wheel / rim diameter | 18 in | 457.2 mm |
| Construction | Radial | — |
What does 315/40R18 mean?
Reading the code on your sidewall
315 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 126 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.
315/40R18 Questions & Answers
Dimensions and fitment guidelines for size 315/40R18
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Hercules Her Terra Trac AT X-journey 3PMS 265/65R18
Landspider Wildtraxx A/T 245/65R17
Lionhart Lionclaw H/T P265/70R17
Gripmax Maxgrip R/T 33X11.50R22
Toyo 225/40R18XL Toy Observe G3-ICE Studded 225/40R18
Toyo 225/40R18XL Toy Observe G3-ICE Studded 225/40R18
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Itp 24X9.00-11/6 Mud Lite AT 24X9.00-11
Laufenn Fit A/S LH01 Made BY Hankook 255/45ZR20
Delinte DH2 A/S 215/70R15
Suretrac Power Touring 1.5-INCH 235/75R15
Atlander Roverstar H/T 265/70R16
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