Originally Posted by
DaveSSS
Many reports of dropped chains and excessive noise on the weight weenies forum. In contrast, the new Chorus 12 has the best shifting ever. No noise problems or dropped chains. I've got the new Chorus 12 on 2 bikes. Performance has been flawless.
I've had very few dropped chains, Sram eTap 22, all corrected by a slight adjustment of the limit screws. So I don't think 122 speed would be any worse.