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High-quality screw cups with cartridge bearing to upgrade existing systems.
· suitable for Race Face X-Type and Shimano Hollowtech II MTB/ATB cranks
· made of forged aluminium 7050 and CNC milled
· solid exterior bearings with balls that are 35% larger than those of interior systems - for extreme durability
· suitable for frames with BSA thread (1,37 x 24) and 68/73 mm case width