With durable and replaceable cartridge bearings

With a 13mm hardened steel shackle

Double Time Engagement - 52 points of engagement via 4 pawls this equates to the freehub engaging every 6

Comes with a liner included

Cateye Rapid X2 Kinetic Rear 50 Lumen LED-USB Light PLP|Model Year With durable and replaceable cartridgeThe Rapid X LED light is a is USB rechargeable with a low battery 'auto save' function that automatically changes the light mode to flash when it gets low to give you an extra hour of light to safely make it home. Specs: 50lm LED Mounts to your seat post (12 32mm) Lithium ion polymer battery Micro USB Attaches to the existing CatEye bracket by using the optional Spacer X 6 modes with memory function High mode1 hr Low mode5 hrs Flashing mode30 hrs