Only at T-Cycle will you find the ultra-customizable Raptobike Idler Kit. Along with an Elite Return Idler, with either an 8mm or 10mm bearing, you get a 23 Tooth Power Idler with either a Sport Series style aluminum cog or the insanely durable Elite Series style titanium cog. With this kit, your ride will be smooth, quiet and efficient. Quite the upgrade for the Raptobike.