The Catrike Return Idler Kit Add-On is for Catrikes that already have a T-Cycle Power Idler. It's known around the shop as the "Completer Kit," because most Catrikes come stock with a T-Cycle Power Idler and this add-on is all they need to optimize the chainline. This kit comes with a Sport or Elite Return Idler, a longer stainless steel bolt and a Stainless Steel Chain Keeper. Just like the Catrike Dual Idler Kit, the result is a chainline optimized by top of the line T-Cycle parts. Also like the Dual Idler Kit, the Return Idler Kit Add-On now comes with a Floating Chaintube Holder.