404581 fits all 2008 Fuel & Remedy bearings, plus Session 8 rocker/seatstay bearings 404318 fits Gary Fisher Hi Fi seatstay bearings & rocker bearings 403099 fits Gary Fisher Hi Fi main pivot bearings 406883 fits Session 8 bearings except rocker/seatstay bearings 419052 is the complete kit to service all Trek & Fisher FS bikes