Prevents dropped chains on road, gravel, and CX bikes with 1x drivetrains. This product has been tested and developed with Team Jumbo-Visma- Similar to the GnarWolf, but has a head that only covers the top and inboard side of a chain- The Guidelock quick adjustment system allows for up to 8mm of adjustment for chainline without the use of shims- Sweep needs will be frame dependant but Low Sweep should fit the majority of needs- Low sweep base has three vertical bolt positions; mid and high sweep do not need- Compatible with bikes that have a braze-on front derailleur mount- Only for use with 1x drivetrains- Works with round or oval chainrings- 39-43g