B.C. to D.C.
Join Date: Oct 2005
Location: between the Popeye's, the liquor store, the funeral home, and the strip club
Posts: 576
Bikes: 1992 Miyata Nine 14; 1971 Raleigh Super Course fixie conversion; 2006 Jamis Nova (853 version); 2001 Diamondback Topanga (SS conversion); 1956 Rudge Sports; 1971 Raleigh Competition (processing); 199? Schwinn World Sport (processing)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
10-spd chain falling off
the situation: brand-new jamis nova, compact 105 10-speed, truvativ cranks and chainrings (alu, I think).
On the outside (big) chain-ring, when in the outside (small) gears, the chain falls off to the outside under load. the chain then loops around itself and takes out the front derailleur if I let it. Inexplicably, the f.derr. is not rubbing/overshifting that I can see. chainring bolts are tight.
The bike has a giga-x pipe bottom bracket whose crankbolt wasn't tightened down all the way when the f. derr. was calibrated. I took it back to the LBS to be readjusted when the crank-arm fell off on the way to work, so everything should be fresh and snug.
I don't get it. Chain too tight, maybe?