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Just had my rock lobster built up by my local bike shop.The frame is quite old school - running 9 speed.The problem is that the bike has had various square bottom brakets and different front mechs - but with each set up the shop can't get the chain to run clear of the front mech - in smallest and largest gears.Has anyone expierienced this problem or any suggestions.
Thanks
If the front mech stops have been set correctly then it's usually a wrong size bottom bracket, the inside stop should be set with the chain in the granny ring and biggest ring on the rear with the cable disconnected, and the outside stops on the big front ring and smallest cog on the rear, a ht2 crankset is easier to set up as all you have to do is make sure the spacers are right for your bottom bracket shell size, not axle length as well
Thanks for the help.Will double check.A little worrying as the bike shop fitted the bottom bracket and chainset !
Cheers.
If it's ok in the granny ring but rubbing in the big ring try a few turns on the front shifter cable tension adjuster, that can sort it sometimes,.
Cheers.