SRAM X0 Type 2 Rear Derailleur
SRAM X0 Type 2 Rear Derailleur Description
The SRAM X0 Type 2 Rear Derailleur is the highest-end offering from SRAM to get the Type 2 treatment. It"s worth looking at if you have trouble with dropped chains, but a roller-style chainguide doesn"t fit with your light-and-efficient setup. SRAM incorporated a clutch mechanism into its Type 2 derailleurs to control chain tension and stabilize the rear derailleur cage; this limits chain slap and keeps the chain from derailing on technical trails.Shimano"s Shadow Plus design, which is engineered to produce a similar chain-stabilizing effect, preceded SRAM"s Type 2 design in reaching the marketplace. However, Type 2 technology differs from its competition in a key way. Rather than opting for an adjustable friction band, SRAM put a Roller Bearing Clutch in their Type 2 derailleurs. The clutch comes pre-set from the factory to provide a certain amount of friction inside the derailleur cage pivot. This friction keeps the cage from bouncing up and down over rocky trails and de-tensioning the chain. Because it"s pre-set at the factory, SRAM"s Type 2 clutch can"t be disengaged or adjusted like Shimano"s Shadow Plus mechanism. That being said, the Type 2 clutch is self-lubricating, and there are no external moving parts, so unlike the Shadow Plus system, it"s designed to be maintenance-free. The Type 2 mechanism adds about 30 grams to the weight of a standard X0 rear derailleur. A unique feature of the Type 2 system is that its Cage Lock technology allows you, with the push of a button, to lock the derailleur cage in an extended position. While it may not be a game changer, this is a nice feature that allows for easier-than-ever rear wheel installation. There"s no need to worry if you accidentally leave the derailleur cage locked; it will return to normal operating position when you hit your first bump.
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