Solid Non-Marking Tires
Tire Size	O. D.	Section Width	Tread Width	Tread Depth
18x7-8x4.33	17.9	6.2	5.9	18/32
21x8-9	20.5	7.3	6.7	53/32
500-8x3.0	17.9	5.1	5.0	58/32
600-9x4.0	20.5	6.4	6.4	58/32
650-10x5.0	22.9	6.9	6.8	66/32
700-12x5.0	26.8	7.5	6.5	87/32
815-15x7.0	28.0	8.6	8.3	89/32
1200-20x8.0	45.9	13.0	12.2	123/32