They have lasted around 14 months I would say. Thats with hitting the trails hear and there and riding my bike everywhere I go, work, shops, everywhere. (everday basically)
They still have a bit of life left in them and I am only replaceing them as I have bought a new cassette and chain for my new bike. So thought it would be best to replace the old ones to make the whole system run n’synce.
They are the best I have seen so far after hunting around for a pair for the last two weeks.
I got a set of the gold ones for the X0 rear mech on my trail bike nearly 2 years ago for a bit of added bling and have not had any issues with them. They look better than the sram one’s, they are lighter & they are still in good nick.