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04-07-04, 09:38 AM
Background, bike in question is a 2002 RM Trailhead, stock drivetrain is Alivio shifters, Deore rear mech, SRAM 5.0 cogs, SRAM PC48 chain, Alivio front mech & Alivio crank. Over the winter I had it upgraded to a RF Next crank, LX front mech & had a new SRAM PC69 chain installed to work with the 9speed chain rings. As my 5.0 cogs were quite worn, the shop put on a new 8-speed cog set, looks like a cheap Shimano set to my eyes.
On to the problems:
1) poor shifting compared to stock set up
2) rear mech will not shift out of the largest cog, just gets stuck there, it's free of crud and freshly lubbed up.
3) rear mech will not go into smallest cog without a fight
4) up shifts (into smaller cogs) are slow and very clunky
Do you think these problems could be caused by the cheap cog set? Should I just throw another 5.0 on there and see if it clears up (I thought the 5.0 performed GREAT!)?
Any help is much appreciated!
On to the problems:
1) poor shifting compared to stock set up
2) rear mech will not shift out of the largest cog, just gets stuck there, it's free of crud and freshly lubbed up.
3) rear mech will not go into smallest cog without a fight
4) up shifts (into smaller cogs) are slow and very clunky
Do you think these problems could be caused by the cheap cog set? Should I just throw another 5.0 on there and see if it clears up (I thought the 5.0 performed GREAT!)?
Any help is much appreciated!