Rear Derailleur Problems

AphoticSketch
AphoticSketch Posts: 32
edited July 2011 in MTB workshop & tech
Hi everyone.

I recently fitted a new Cassette to my Boardman Pro Hardtail, as I had snapped a couple of teeth off the previous one.

Anyway, I'm having some trouble aligning it. Since I bought the bike and had it built by Halfords :roll: I haven't been able to use the highest (smallest) gear on the rear cassette.

I have checked the cable tension when this gear is selected and it is very slack. I've tried tightening it but that just causes it to shift up a gear.

Everything else is set up fine and aligned perfectly as far as I can tell. Does anyone know what the problem may be?

Thanks for your help.

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