Steering head ball races to suit Norton brazed frame with long road holders. Complete NEW set of 4 races with balls. ID 1-11/64" x 3 races; 1-1/4 x 1 race; 34 x 5/16" balls Original part numbers: B2/173; B2/173A; B2/173B; T358; 16725 - Fork crown or head clip ball race 16725 -fork crown ball race bottom