07-16-2013, 09:13 PM
I have a 2010 specialized tarmac sl3 with s works carbon crankset and chainrings, and I run dura ace 7900 cassette, RD and FD on old bontrager racelite xx carbon clinchers. I replaced the chain and the cassette and the chainrings were replaced last year. I have a clicking noise that only happens when I am in the small chainring (39 tooth) and my 19 tooth cog. It occurs only when I apply pressure not when just spinning freely. It happens while in or out of the saddle. I checked the indexing and it is right on. The chain is on the right way, I removed the pedals and relubed the threads( dura ace 7900). I regreased the DT swiss 240 hubs and the ratchets as well and the chain was recently degreased and lubed. I don't feel it is the seat post nor saddle rails as I have had this happen before and I fixed it. It sounds as if it is coming out of the bottom bracket, the chain is not rubbing on the FD nor the chain watcher. It only occurs in the 39x19 gear, when I am in the the 39x21 and 39x17- the adjoining cogs, there is no clicking whatsoever when I am applying a great amount of pressure. I would figure if it were the BB it would in all gears. Bottle cages bolts recently greased. B tension screw is set and no rub of the cog on the chain when in the stand tuning the gears. Any help would be greatly appreciated as where I live the 39 x 19 is my main climbing gear. I greased the rear drop out and the QR skewer as well. Thanks.