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Sora chain ring "dropping off" going from large to small ring?
Hello everyone
I have a 2004 Trek 1000 road bike, with about 1700 km on the close, which has Shimano Sora group set - double chain ring. Generally I am happy with the bike given its low price anyhow.... Lately, when I change from large chain ring to small one the chain simply drops off (every 3rd-4th change). Once it even did so when going from small to large chain ring. I wonder if anyone can shed some light on this? My LBS checked it and in test could not fault it. The only advice they could offer me was to change a few rear cogs up/down so that the chain is more or less "straight" when I am about to change from small to large chain ring or vice versa. I have been trying this and it certainly does help somewhat but I can not help thinking this is all rather odd. Is this as good as it gets with Sora? Is there anything else that can be done/adjusted? The LBS did adjust the chain and pronounced it good. Will a 105 or Ultegra group set suffer from the same gear-change problem? thank you |
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