How Tall Is a 225/60R18 Tire? | Exact Height And Size

A 225/60R18 tire stands about 28.6 inches tall, with a width near 8.9 inches and a sidewall of roughly 5.3 inches.

If you’re checking clearance, comparing replacements, or setting up a lift, the number you need is the overall diameter. For a 225/60R18, that figure lands at about 28.6 inches (727.2 mm). The section width measures roughly 8.9 inches, and the sidewall height comes out to about 5.3 inches on its 18-inch rim.

One important note before you buy: the published dimensions are nominal. Actual measurements vary slightly by brand and model, so always confirm clearance against the specific tire you’re considering.

Breaking Down The 225/60R18 Size Code

Tire sizes follow a consistent code, and each part of 225/60R18 tells you something specific:

• 225 — section width in millimeters, measured from sidewall to sidewall.
• 60 — aspect ratio; the sidewall height is 60% of the width (about 135 mm).
• R — radial construction.
• 18 — rim diameter in inches.

Multiplying the width by the aspect ratio gives you the sidewall: 225 mm × 0.60 = 135 mm (about 5.3 inches). Double that and add the rim diameter to get the overall height: 135 mm × 2 + 457.2 mm (the rim) equals roughly 727 mm, or 28.6 inches.

Key Specs For The 225/60R18

The table below sums up the essential measurements a typical 225/60R18 tire carries. Trusted sources like tiresize.com’s 225/60R18 size page and 1010tires’ tire size calculator confirm these figures.

These dimensions give you a solid baseline for comparing against other sizes or checking what fits your vehicle’s wheel wells.

Why Actual Tires Differ Slightly

The spec sheet gives you the nominal size, but the tire you mount may measure a bit differently. For instance, the Continental TrueContact Tour 225/60R18 lists a section width of 9 inches on a 6–8 inch rim range, with a max load of 1,764 pounds and a tread depth of 11/32 inch. The Bridgestone Dueler H/P Sport in the same size shows similar width but a different tread depth and a higher speed rating.

That variance matters for two reasons. First, a wider-than-nominal tire can rub on suspension parts or fenders if your vehicle has tight clearance. Second, different tread depths and compounds change how the tire wears and performs. Before you commit, check the manufacturer’s spec sheet for the exact model you plan to install.

Also note that suffixes change the tire type. A 225/60RF18 is a run-flat version, like the Bridgestone DriveGuard, which means it can travel a limited distance after a puncture. The size string looks nearly identical, but the construction and behavior differ.

A 225/60R18 is not a universal replacement for every 18-inch tire. Wheel width, load index, speed rating, and OEM recommendations all matter. If your vehicle came with a different size, confirm the new one matches the load and speed requirements stamped on your door placard.

If you’re shopping for replacements and want a tested lineup of options, our roundup of the best 225/60R18 all-season tires covers top performers across categories.

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