8.25 = section width = width of tire mounted on wheel (may be slightly wider than tread width)
15 = rim diameter in inches


My tires 215 / 70 x 16

215mm = section width
70 = aspect ratio = height of sidewall from ground to rim = 70% of section width = 150.5 mm
16 = rim diameter in inches


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)