Creaking noise on smaller rear gears

Rick448
Rick448 Posts: 69
edited December 2011 in Workshop
I am just getting back into cycling and have bought a new Bianchi, my old Coppi is now going to be used for winter training. I bought a Turbo trainer and tried it out yesterday. The problem i have is that on the bottom 2 or 3 gears on the rear casette it makes a grinding / creaking sound. This stops when on higher gears. It is not the chain rubbing on the front mech and i cant feel any play on the bottom bracket, although there is flex on the chainset. This is a Shimano Tiagra C/S. I does seem that the noise comes from the rear.

Any ideas?

Thanks :D

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