DISC

Disc, rear wheel 28 inch and 32 inch, 8-bolt hub, 6-bolt rim. Tractors: 8N (1948 to 1952), NAA, 600, 700, 800, 900, 2000, 4000 (1953 to 1964), 2000, 3000, 4000 (1965 to 1975), 2600, 3600, 3900, 4100, 4600, 5600, 5700, 6600, 6700, 7600, 7700, 231, 233, 333, 335, 420, 515, 531, 532, 535 (1975 to 1981), 2310, 2610, 2810, 2910, 3610, 3910, 4110, 4610, 230A, 234, 334, 530A (1981 to 2/1990).