RG>Hi I was wondering if anyone would have an answer as to why
RG>my chain jumps from the larg chainring to the small one
RG>every time I hit a hard bump. I have Chorus Ergo
RG>brake/gears. I tried taking some links off the chain to no
RG>avail. I was wondering if there was a problem with the the
RG>ratchet in the brake lever. Find it difficult to believe
RG>this could be a problem since I do not use it as much as
RG>the lever for the rear derailleur.
This may be a problem with the chain line - a line straight back from
the midpoint between your chain rings and the centre of your cog set
should be parellel with the main front to back axis of the bike - could
be it's off, especially if the bike has a fairly short rear triangle.
Phil
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 X SLMR 2.1a X Against logic there is no armour like ignorance...
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