The ICE Dual Idler Kit is the ultimate chainline upgrade for all ICE Trikes. This kit lets you get rid of nearly all your chain tubes and improve your drivetrain for lower friction and higher performance. Side by side Power and Return idlers work together with a Clamp-On Single-Sided Chain Keeper to optimize your chainline. On newer trikes, you might have to keep some chaintubes in the rear to protect the frame if you fold the trike.