Cateye's RM-1 bracket designed to fit on the rails of a saddle.Rail diameter 6 - 8mm. Rail spacing 56 - 78mm Fits Rapid 5 TL-LD650, Rapid 3, TL-LD630-R, Raid 1 TL-LD611-R TL-LD610,
Bracket for RM-1 Saddle CATEYE Brackets & Others - Color: Black, As ONE Part Number: 64-9544-43 | MonotaRO Thailand