Profile Design Aluminum Gap Cap

Profile Design Aluminum Gap Cap. Installing a threadless fork doesn't get any easier. The Profile Design Aluminum Gap Cap has an exclusive 3 wedge design that eliminates the need for a star fangled nut. The Gap Cap aligns perfectly, no matter what the steerer tube material. Smooth expanding wedges make it easy to transition from a 1 to a 1 18 steerer tube and grips tight the first time.