315 tires

315 mm across the tread — about 12.4 inches — on rims from 17 to 24.5 inches. 80 sizes in all. The second number changes the height, not the width.

17-inch rim — 9

18-inch rim — 9

19-inch rim — 9

20-inch rim — 9

21-inch rim — 9

22-inch rim — 9

22.5-inch rim — 5

23-inch rim — 9

24-inch rim — 9

24.5-inch rim — 3