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Old 02-22-07, 06:04 PM   #1
Blender
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Shifting setup Help

I decided that I would try SIS shifting on my older Road Bike.
I replaced the 6 speed FW with a 7 speed FW 12-28, got a set of downtube 7 speed shimano SIS shifters on E-bay. I took a fairly new SORA derailer off of another bike (the Sora was not rated for a 32 tooth FW anyway)

I can get the low to high shifting to work fine but cannot get the high to low to index properly. It takes two clicks to get off the 28T. If I adjust for high to low it wont shift up on the first click and clatters.

The Chain is the same one. The 6 speed suntour had a 28 tooth high gear.

Could it be the Chain?
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Old 02-22-07, 07:11 PM   #2
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Could be the chain if you have an old, wide 6-speed chain but it also could be that the rear derailleur limit screws aren't adjusted properly. Adjust them with the rd cable disconnected, then set up the shifting.
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Old 02-22-07, 10:31 PM   #3
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Check the condition of the cable between the chainstay and the derailleur. If that's sticking you'll get a similar problem.
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Old 02-23-07, 05:23 AM   #4
Blender
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Chain Chart?

I will double check the Cable. I will probably just replace it tonight.
The Chain is an older style six speed chain. I will be at the bike shop so I will also get a chain

I have searched for some kind of a Chain Chart showing the different dimensions but come up empty.
Is 7 & 8 speed chain different? I assume so
How about 6-7 speed chain. I suspect they are but am wary of labeling for marketing purposes and some of the LBS guys dont always know slightly older technology
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