Bicycle Mechanics - ceramic bushing for Shimano 600
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08-09-06, 02:26 PM
I recently aquired an abused 86? 600 rear mech with a trashed jockey pulley with a ceramic bushing (the idler pulley is a retro-fitted Suntour!). The teeth are worn down to slight bumps -- i guess the chain was misaligned for a while. I was going to stick another non-ceramic g-pulley in there from parts I had, but I realized I had no spare 'Centeron G-Pulley', only idler pulleys. Is there a difference besides the slight raised edge found on the g-pulley and what does it do? Can I buy ceramic pulleys from somewhere?
08-09-06, 03:57 PM
Centeron pulleys are designed to have side play. I think I have a DeoreXT pulley of that vintage that you can have (likewise, ceramic-bushing Centeron upper pulley). Drop me a PM if you're interested and I'll look for it after work.
08-09-06, 04:00 PM
I bought new pulleys for my old Deore rear derailer at www.loosescrews.com
Mine were worn to sharp points :) I bet the "generic" ones they have for 6/7 speed derailers will work for the 600.
08-10-06, 02:15 PM
hmm, so i while i was looking for pulleys, i ran across some nice looking yet frowned upon purple anodized pulleys that would go great with another bike. Is there a certain amount of sideplay to aftermarket ones like that?
Is is the sideplay really necessary? I suppose it helps with indexing misalignments, but what about suntour pulleys? All the Suntour pulleys I have look the same and they don't use g-pulleys.
Maybe I have too much time on my hands to be fussing over the sideplay of pulleys with no significant load. Oh well, santa is dropping off a pulley soon now :D
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