Profile Racing Bolt On Spider

Profile Racing's Bolt On Spider 19mm offers compatibility with Profile Racing's 3-Piece Chromoly Crankset and 19mm BB axles, and allows mounting chainrings on either the inner or outer face of the spider for chainline adjustability. It works best with the Profile Internal Bearing Euro BB, American BB, MID BB, or Spanish BB, and is only compatible with 19mm axles. This spider comes in two styles—4 bolt (104MM BCD) or 5 bolt (110MM BCD)—and weighs 65g/2.27oz (4-bolt) and 71g/2.48oz (5-bolt) in either black or silver.