The RL9's "TR4-Link" is an incredibly plush full floater four bar link rear that offers an active rear but yet provides sweet spot pedaling with a leverage ratio that ramps up smoothly to prevent bottoming.
Combine that with our standard (51mm I.S.) 8" floating rear brake mount along with our famous concentric bottom bracket and the RL9's supercharger-like acceleration and you'll have a bike that gives you the confidence to push yourself to the edge and beyond!