deano69
Veteran
- Location
- kent ( Garden of England )
I have just rebuilt my hardtail mountain bike after having frame powder coated, its an 2005 bike so all the components were getting worse for wear, so I replaced many parts for new ones its now like a new bike again
Anyway the old crankset was worn and stuffed as an old fixed chain wheel version so needed replacing so I bought a Alivio replacement 42-32-22 x 170 which has replacement rings if required at a later date, I'm also running an new 8 speed KMC z chain, all was well but the rear derailleur was a shimano Altus mega pulley type with oversized 15 t jockey wheels but since 05 its slowly been wearing to the point that the whole thing moves about and shows wear at all pivot points.
So I got today a new shimano Alivio 8 speed rear mech with oversized 13t jockeys and all is well it works great and is very smooth shifting now its all set up and chain is fine did'nt need to add or remove any links, but after setting the H and L screws I them went on to set the 3rd screw for the tension which screws in or out against the rear mech hanger which is also new.
The problem is that when chain on smallest front ring and largest rear sprocket to allow the chain to run freely you need to turn the 3rd adjust tension screw to lift the 1st jockey wheel away from the largest and other sprockets or the chain rides bumpily along the top of each sprocket, the old Altus screw was about half way in adjustment wise and was perfect but with this new alivio one I bought today the screw has to be turned all the way in to give clearance required, although its working fine now will the spring tension wear very quickly and cause the chain to bump against rear sprockets once again as there is no more adjustment available ?
Any help with this question much appreciated,
Deano
Anyway the old crankset was worn and stuffed as an old fixed chain wheel version so needed replacing so I bought a Alivio replacement 42-32-22 x 170 which has replacement rings if required at a later date, I'm also running an new 8 speed KMC z chain, all was well but the rear derailleur was a shimano Altus mega pulley type with oversized 15 t jockey wheels but since 05 its slowly been wearing to the point that the whole thing moves about and shows wear at all pivot points.
So I got today a new shimano Alivio 8 speed rear mech with oversized 13t jockeys and all is well it works great and is very smooth shifting now its all set up and chain is fine did'nt need to add or remove any links, but after setting the H and L screws I them went on to set the 3rd screw for the tension which screws in or out against the rear mech hanger which is also new.
The problem is that when chain on smallest front ring and largest rear sprocket to allow the chain to run freely you need to turn the 3rd adjust tension screw to lift the 1st jockey wheel away from the largest and other sprockets or the chain rides bumpily along the top of each sprocket, the old Altus screw was about half way in adjustment wise and was perfect but with this new alivio one I bought today the screw has to be turned all the way in to give clearance required, although its working fine now will the spring tension wear very quickly and cause the chain to bump against rear sprockets once again as there is no more adjustment available ?
Any help with this question much appreciated,
Deano