This derailleur survived when all else failed at the 2014 Washington County Fairgrounds Cross Crusade race. There were 107 DNFs, most due to rear derailleur failures. Not only did the CX1 work throughout the race, it shifted brilliantly under load even when it was completely packed with mud. I used this derailleur with a 12-30 Shimano Ultegra Cassette, a Shimano 105 10-speed chain, and a Race Face Narrow Wide 40T chainring up front.
I purchased this CX1 rear derailleur to work in conjunction with my 10-speed SRAM Force shifter on a 1x10 system for my Asylum Meuse. Let me say that this is probably the coolest piece of bike tech I've purchased in two years. Not only is it super durable, it's snappy and responsive and when combined with a narrow wide chain ring, I've experienced absolutely NO chain dropping or chain slap on my stays. This is in large part thanks to the clutch system. I'm also very impressed with how aggressive the teeth on the pulleys are (they really hold onto the chain and make sure it keeps moving even when it's all gunked up).
If you have SRAM shifters and you're looking for a way to lighten your bike, upgrade your shifting, and switch to a 1x1011 system, this is the best thing you can get.
What's more, when and if I decide to upgrade to 11-speed, all I have to do is get a new right shifter.
Adjusted it using the videos then a second minor adjustment after the first ride and since then has worked as smooth as silk even shifting under heavy load.
CX1 is a perfect system. No dropped chain, foolproof setup. 40T front, 11-32 back gives me everything I need to CX racing and some trail rides.
