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345 tire size in inches

A 345 tire is 345 mm wide: 13.58″. Michelin and Toyo list their 345s at 13.7″ to 14.5″, depending on the model and wheel. Height depends on the rest of the size: 345/30R19 is about 27.2″, 345/30R20 is about 28.2″ and 345/25R21 is about 27.7″.

Every 345 size

6 sizes for 17″ to 21″ wheels, with the heights and widths their makers list.

SizeHeight ″Listed width ″Tires
345/40R1727.7 ≈2813.71
345/35R1827.5 ≈2813.82
345/30R1927.2 ≈2713.85
345/30R2028.2 ≈2813.83
345/25R2127.6–27.8 ≈2814.0–14.53
345/30R2129.2 ≈2913.82

345 against nearby widths

Nominal widths from the size code.

WidthInchesvs 345
32512.80−0.79″
33513.19−0.39″
34513.58–
35513.98+0.39″

Questions about 345 tires

What size is a 345 tire in inches?

13.6 inches wide (345 mm). The 345 only gives the width. Height comes from the rest of the size, so the 6 sizes of this width here run from 27.2″ to 29.2″ tall: 345/30R19 is about 27.2″, 345/30R20 is about 28.2″ and 345/25R21 is about 27.7″.

How much wider is a 345 than a 335?

10 mm, or 0.39″ on paper: about 0.20″ more on each side.

What widths do tire makers list for 345 tires?

The size code gives 13.6″. The widths the makers publish for the 16 345 tires here run from 13.7″ to 14.5″. Toyo publishes overall width; Michelin publishes section width.