What am I doing wrong? - Chain related issues
02-14-12, 04:27 PM
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What am I doing wrong? - Chain related issues
I got my Univega as my first real road bike about two years ago. I felt the DT shifters were too much of a reach for me on the large frame, so I installed bar end shifters. Everything worked well...for a time. I came across a set of new Tourney RD/FD set for remarkably cheap, so instead of futzing with my rusty suntour ARX, I installed these. New chain, old freewheel. Everything worked fine, and was whisper quiet. Loved it.
Here's where things get crappy - If I shift into the middle ring, I go to shift into the big ring, and the chain jams into the gap between the the two, and wont become unstuck. On the stand, no problems with hitting everything up front, and spacing doesn't seem to be an issue. Is it technique? I can shift into everything while pedaling - on the stand - but not while riding.
Worn rings? Should I change technique? Throw the bike in the river? Send the bike to FordSVTparts since he's one of the only other giants I know of?
Pic for the fun of it.
Here's where things get crappy - If I shift into the middle ring, I go to shift into the big ring, and the chain jams into the gap between the the two, and wont become unstuck. On the stand, no problems with hitting everything up front, and spacing doesn't seem to be an issue. Is it technique? I can shift into everything while pedaling - on the stand - but not while riding.
Worn rings? Should I change technique? Throw the bike in the river? Send the bike to FordSVTparts since he's one of the only other giants I know of?
Pic for the fun of it.
02-14-12, 04:58 PM
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I wonder if JR even put a new chain on it. could the issue have something to do with the chain wrap of the big pulleys on the RD
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02-14-12, 05:12 PM
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- If it worked well before the new chain, but doesn't after it - I'd suspect the chain not the derailleur. At least I don't see how the rear derailleur would cause a properly fitted chain to fall in between the big and little chain rings.
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02-14-12, 05:25 PM
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+1 Sounds like chain is too narrow. Make sure you bought 5/6 speed chain. Looks cross chained right now.
Last edited by wrk101; 02-14-12 at 05:58 PM.
02-14-12, 05:57 PM
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There was a time where the protruding pins of the chain are what helped a chain up the rings, not the pins in the rings. Also, basically as others have stated, the chain is too narrow in Overall width. It fits the rings, but it not wide enough to escape the trench between the rings.
02-14-12, 06:35 PM
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Actually he did state that he installed a "new chain, old FW".
- If it worked well before the new chain, but doesn't after it - I'd suspect the chain not the derailleur. At least I don't see how the rear derailleur would cause a properly fitted chain to fall in between the big and little chain rings.
- If it worked well before the new chain, but doesn't after it - I'd suspect the chain not the derailleur. At least I don't see how the rear derailleur would cause a properly fitted chain to fall in between the big and little chain rings.
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02-14-12, 07:33 PM
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What??? Only 2 wheels?
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Or technique? Don't crank on the pedals hard when shifting the front. That part of the chain is under tension from pedaling, unlike shifting the rear. It's just a thought.
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02-16-12, 06:46 AM
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Well, it IS a 6 speed chain, for my 6 speed rear. Still no idea whats happening. I inspected the teeth on the crankset and the FW and they are all in good condition. The chain is getting slightly dinged up from falling between the rings however, which is a bummer.
02-16-12, 08:19 AM
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CHAIN sounds suspect...perhaps mispackaged narrower chain? Check and make sure the FD is square with the chainwheels. Do you still have the old chain? If so, pop it back on and see if it still works. Don't throw in in the river, I'd drive across the Bay to take it off your hands, you wouldn't want to get fined for littering! ;-)
