Join Date: May 2007
Location: Betelgeuse 5 Massachusetts
Bikes: '06 Rockhopper disc comp
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Shimano Derailleur Problems
Okay, I've been searching around this forum and the mechanics forum for three days now and can't find any answers. I bought an '06 Rockhopper disc comp last week, rode it around checking it out on the flat a little before I took it out in the woods and everything was glass smooth, shifting was flawless, brakes are great. Took it into the woods down a pretty rough downhill hill run, road it around for three or four hours and took it out on a flat paved rail trail a couple days later where I noticed that shifting into AND out of the next to the last three smallest cogs on the back I get a loud clunking noise. I took it back to the shop where three different mechanics looked at it and can't see what's causing the problem, they changed the cable, tried to adjust everything, replaced the rear cassette (which actually showed wear on the gears in question after only about eight hours of riding).
Now I am a new rider and my technique is certainly lacking but I'm not cross chaining, I can't see what I'm really doing wrong here and neither could the shop mechanics. They sent me out with instructions to ride it and bring it back in a couple weeks.
They did not see any indication of the derailleur being hit or anything, no sign of damage from the outside. Could something simply have vibrated loose? This is pretty annoying in a brand new bike, I did get a couple hundred off for taking last year's model but still, seven hundred bucks for a bike that doesn't shift well? I ain't a happy camper right now, when I bring it back does anyone here have any advice on what else they should check? They looked it over for about an hour and a half and were stumped.