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.
Best upgrade I’ve made to my ICE Sprint! I can’t say that I have objective evidence that removing the chain tubes increased my power transfer to the wheel, but, subjectively, I’m taking the same hills I struggled on in granny gear faster and in higher gear, despite being marginally weaker in the legs from a winter of almost sno cycling. As to folding, I wrap the chain at the hinge in an old t-shirt and Velcro straps and it works just as well. If you have been thinking about this upgrade but haven’t done it yet, don’t wait any longer.