This adapter makes it possible to mount cranks with BSA bottom bracket in frames with Pressfit PF30 bottom bracket housings (eg Shimano, FSA, Sram GXP etc.).
The Profile Design Hypersonic 50a is for riders that want a lower profile and more aggressive position getting the armrest as flat as possible on top of the base bar.
A triathlon cycling shoe featuring a combination of a Velcro Powerstrap and a Boa® dial for a quick and secure closure, a polyurethane-laminated mesh upper for ventilation and support, and an R3 full unidirectional carbon outsole for direct power transfer