The drivetrain has about 20,000 km maybe 2,500 km on the chain... a few thousand of those kilometers have been in the rain and snow.
When compared to new crank, the big ring is significantly worn, with all the teeth coming to a sharp point. The small ring is arguably okay, not nearly as worn as the big ring and probably has more life left. The three center cogs on the cassette are worn as indicated by the Rohloff wear indicator.
Originally Posted by
ilovecycling
Wow $550 for chain rings? They better be made of some precious metal for that much.
the quoted price seems to be inline with what local bike shops are charging.
Big ring $479
http://www.labicicletta.com/componen...chainring.html
Small Ring $99
http://www.labicicletta.com/componen...chainring.html
Of the five road bikes I have, three of them were built up by me including the bike we're currently discussing. Bikes are not terribly complicated machines. From time to time I do run into an issue that I cannot resolve myself or do not have the necessary tools. When I do, I rely on a local shop that I trust explicitly. This bike has Di2 so it's not a matter of cable tension, Low & Hi limits are properly set and the font of the derailleur cage is exactly 4mm above the the large chainring. Myself and the mechanic put it in adjustment mode and went through the procedure of recalibrating the entire system. Lastly the shop put a newer ultegra 6700 crank on the bike and the problem went away. I appreciate everyone second guessing replacing the chainrings and my choice of shop, but my request was not a critique of my mechanic or their diagnosis. I was looking for ideas on a new crank to replace the existing crank.