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Builder's Corner Restoration and preservation. Keep them running in perfect shape. What size is your bottom bracket? |
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#1 |
New Member
Join Date: June 28th, 2011
Location: Maine
Posts: 10
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I'm running 1x9 set up on my 87 Wicked. Recently the chain has started falling off while going over roots, logs etc in the woods.
What could be the cause of this? Could I have all of sudden developed a lot of frame flex? I was thinking it might be the rear wheel? Any feedback is appreciated Dean |
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#2 | |
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Join Date: February 12th, 2010
Location: laconia
Posts: 303
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#3 |
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Join Date: March 12th, 2009
Location: Tucson
Posts: 809
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Also: chain length. If it is when going over stuff, maybe you just need to clean and lube---i.e., quick back pedal before you go up and over, and the chain grabs/bounces/ goes AWOL when you start to pedal again.
Why not grab a Third Eye or other stopper?
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1975 Witcomb USA, 1981 Chris Chance; 1984 Fat Chance, 1987 Team Comp, 1991 Yo Eddy, Monster Fat, and Wicked ....happy to have finally found a clean 80s Fat Team Comp with a box crown fork ![]() |
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#4 |
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Join Date: March 15th, 2010
Location: Naperville IL
Posts: 716
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sounds like a worn out chain, freewheel, and derailleur tension spring
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#5 |
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Join Date: July 17th, 2011
Location: in the harbor
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when the chain line is ok, then it can only be caused by wrong chain length.
There is a way to calculate the chain length for example Chainstay length in mm --> 400 Number of teeth of the largest chainring --> 46 Number of teeth of the largest sprocket --> 23 the result is Chain length = 100 members = 127.4 cm |
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#6 |
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Join Date: May 18th, 2011
Location: FoD UK
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Most people over here running a 1x9 or 1x10 , tend to use a chain device up front to stop this happening .
Also your chain could have stretched-maybe worth checking. just a thought
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