levelboss2003

www.supercycles.co.uk works for me

I had a koxx rim(rear)and it was wicked and strong as........

you can sort this problem without taking the spring outon mechs tiagra and above. just take the mech off and on the knuckle that contains the spring for the cage there should be a 1.5 or 2mm allenkey socket (what size ive forgot and cant be arsed to go look)when you undo this long thin bolt(it actually locates in a groovethat holds the chain cage to the main part of the mech,once apart you will see two holes that the spring locates in from new they are set in low tension so changing to the other hole gives the mech more chain tensioning power alone it does very little and the mech body will still hit the frame but if you set your chain length so that in you trials gear the cage (two jockey wheels ) are completeley vertical.because the cage is slightly off set to the cage pivot the jockey wheel/chain actually contacts the cassette before the mech can contact the frame. problem solved and your mech is still fully functional though i would say it only works on sprockets of 14 and above im not sure about everyone else but the general favourite ratio in bedford(and theres alot of riders) is 22 chainring and 16 sprocket so it worked fine with us