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Old 02-07-10, 01:20 PM
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operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Posts: 28,353

Bikes: 1987 Bianchi Campione

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Originally Posted by grall1126 View Post
I have a old bike with down tube shifters. I have a chain with the correct size and for some odd reason I can't get the rear derailler to shift into the bottom four (4) rear sprockets on the bike. It will shift them upward toward the spokes but it won't go down toward the bottom four. I adjusted the screws in the back and it just seems that it won't kick it downward. I know this might be a hard one but just curious about how to fix this. I changed the cable, tubing, and I must be missing something.

It's a shimano 105 and the only thing I could think of is the cable? Maybe not the correct one? But it fits and does get tight?

Any help is appreciated
1) Disconnect cable from derailleur.
2) Manually push the derailleur up the cogset, towards the largest cog, while pedalling forward - be careful.
3) Observe movement. Derailleur should auto travel back down to the smallest cog

This will tell you if it's the cable + housing system that's the problem or the derailleur. Post back with results.
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