Hello everyone. I have a problem and have had for some time and I hope someone can help me. I have Dura Ace 10 speed shifters and rear dreailleur with a 12/27 cassette that sometimes hangs in the middle of the cassette when shifting up. I've had my LBS adjust it a friend and myself to know avail. It doesn't do it all of the time and nothing is worn out, but it is annoying especially for the quality of the components. Oh yeah the chain and derailleur are Ultegra.
Thanks for any advice you can give me.