Box's One Rear Derailleur is a pivotal part of their first-generation mountain bike drivetrain. Patent pending CamClutch technology reduces chatter and maintains chain tension. Housed in a carbon fiber/nylon composite body, the clutch mechanism uses a clever, one-way friction plate to increase tension as the cage moves forward and release tension as it travels back. The inner and outer cages are made of durable cold forged aluminum and feature jockey wheels with sealed precision pulley bearings to reduce friction and prevent contamination.
I've have only owned the Box One derailleur for a week and only rode 75 miles on it but so far it has worked great. The set up was simple and easy, not that derailleurs are that difficult to setup anyways. The construction of the derailleur looks to be great quality. A bonus is that the aesthetics of the derailleur look sweet, especially when paired with a black cassette
Ordered the entire Box 1x11 drivetrain and I am very happy with it. Setup is pretty easy and the shifting is quick and smooth. Tension is great on my XC bike. Haven't even heard it slap once. Very happy with this purchase it was a big upgrade from my shimano xt setup. Box has a customer for life!
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