Join Date: Feb 2009
Bikes: 2008 Mercier Corvus Steel, 2007 Trek 4300, ~1980 Takara Deluxe 12, 1985 Trek 620 (modernized)
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I took the bike to the shop. The mechanic took one look at the crank and said "You stand up on the pedals and push hard, don't you?"
I still couldn't see the wear, but he threw a length of test chain around the crank and showed me how it wasn't meshing properly.
He then tested the rear cogs. Those were borderline as well.
I knew the SR Suntour crankset on the 4300 was bad when I got it, but gee-wiz... less than a 1000 miles and I need a new drivetrain... because EVERY front chainring was worn out? I ride hard up hills, but I don't think I'm so hard on my components that they should have worn out so prematurely.
Another nugget... the BB that Trek used on that bike wasn't properly sealed. The mechanic popped it out and showed me... it wasn't a single cartridge, but 2 cartridges held together by a rubber seal... Grrr...
In any case, problem solved and now my bike has an upgraded drivetrain.