6AL4V Titanium Drivers for Profile Mini, Totem, Classic MTB, High Flange, & any other Profile hub that uses a 4 pawl driver. Cassette Driver for 12t
- 18t Profile Cog 3oz (82g) 9 Tooth One Piece Driver 2.6oz (72g) 10 Tooth One Piece Driver 2.8oz (78g) 11 Tooth One Piece Driver 3.2oz (88g) 3 Speed Cassette Driver + AL Derailleur Hanger 3.7oz (104g) Pawls & Springs not included Made In USAIt is important to also replace your chain whenever you install a new driver or cog. A worn, stretched chain will cause your driver or cog to wear out much faster.