Is the travel adjust important to you? I've heard about previous micro STA having long term durability issues. At being said all the reviews for the 2013 were good. If the travel adjust isn't important to you I would get the CR or the R model.
I have the 2013 STA 55. Very good air spring. I had to send it back for warranty when the top out spring broke, but all has been good since. Very smooth for an air fork. If I were to do it all over, I would consider the CR. I don't use travel adjust or lockout. I bought the STA for the chrome stanchions and tapered steer tube which were not offered on the CR model. I would have liked to try them back to back, but no one in my area has demo's available.
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