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  1. #1
    Newbie
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    Jun 2014
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    Birdy chain tensioner

    I managed to lock up the back wheel earlier in top gear (riding slow fortunately). When I stopped the chain tensioner was jammed in the cassette! I suspect it was because of folding or unfolding it earlier incorrectly. So I managed to fix it by breaking the chain and unscrewing it then putting it back on then joining the chain back up. I've set it so it's locked in position and above the chain in all gears. But it seems very high in 1st and 2nd gears; almost vertical. Should it be able to pivot ie not be tightly screwed up? Should it be almost vertical in lower gears? It's a Shimano 105 derailleur and Hyperglide cassette. It's bent in a curved shape now - all the ones I've seen in photos are completely straight. I'll try to attach a photo.




    Steve
    Last edited by Tinman10; 08-19-14 at 02:52 PM.

  2. #2
    Senior Member
    Join Date
    Aug 2006
    Location
    Victoria BC Canada & La Quinta CA USA
    My Bikes
    Birdy Red 8 speed, Birdy Blue 21 Speed, Birdy Monocoque 24 Speed, 2002 Devinci Desperado, 1996 Rocky Mountain Hammer Race
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    The wire bail on my 24 speed (3x8) is locked into position and just clears the chain when the chain is on the smallest ring. It angles up at about 70 deg when its on the largest ring.

    The range of positions will vary depending upon the gear cluster range and derailleur you have

  3. #3
    jur
    jur is offline
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    Sticking up high in low gear will be correct. Mine used to touch the tyre almost.
    My folding bike photo essays www.dekter.net/

  4. #4
    Senior Member bhkyte's Avatar
    Join Date
    Sep 2008
    Location
    York UK
    My Bikes
    2X dualdrive Mezzo folder,plus others
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    I didn't get off and remove long grass trapped in it recently and it jammed into the chain and locked the back wheel also. Went the other way from yours past the chain. Bit of a mess but sort of straightened out ok. Mine touches the big Apple tyres very slightly in highest gear. Personally I prefer mine locked in place so it does not drop whilst riding.
    It was my own fault I bent mine for carry on with a field of grass hanging off my gear transmission!
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8. Birdie red.

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