Every once in a while I buy something that is totally worth it. This gizmo is worth it. It was a small bit of work to install, you need to remove the shift cable, then unbolt the front deraileur cage, then using the bolt they give you and this bit of metal re-assemble it so that the metal just clears everything on the inside of your chain rings. Then reset the shift cable and test it. With a small amount of finaglling and that I put my shift cage back in alignment I got it to work.