Yet Another Cycling Forum
General Category => Freewheeling => Folders => Topic started by: Aunt Maud on 15 January, 2019, 01:52:59 pm
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So, after 3 months of easy going things start to fall off the silver shopper.
First to go is the bolt holding the funky derailleur.
What kind of bolt is it, any ideas?
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Dunno off the top of my head - but if you are at school, Balfe's Bikes at 338 Kennington Lane might be able to help you.
From this
https://2.bp.blogspot.com/-_HoS_CVvEUE/U2T7EMabUTI/AAAAAAAA4DA/TDdNaQ9QmIA/s1600/00+Brompton+Part+List+-+Rear+Hub,+Axle+Fittings+&+Chain+Tensioner.jpg
It looks like a standard 10mm (I think) nut + washer.
ETA - if you have hub gears in addition to the two sprockets, it will be different.
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My gear hub axle has a weird firkin/furlong/farenheit thread pitch of some sort. AIUI that is common.
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What type of folding bike, leading to what type of rear hub? There are several rear axle thread standards.
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I *think* the two speed hub is metric and the Sturmey Archer is in black and white.
But I'd probably just buy the appropriate Brompton spare part rather than guess.
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What type of folding bike, leading to what type of rear hub? There are several rear axle thread standards.
It's a Brompton Supernotlight.
I found a suitable coach screw in the bit box at college, but I'd rather have the proper thing.
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I don't have that hub to hand to check but I vaguely recall the axle has a 10x1 thread (not found confirmation of that) and the third axle nut holds the derailleur in place. What does a coach screw have to do with that nut (or are we talking about a bolt holding parts of the derailleur together)?
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^ I was wondering the same - whether Aunt Maud meant that the two parts of the mech had come apart.
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It's not anything to do with the hub, but the 2 cog derairlliure type thing which is attached to the folding rear triangle. Currently held on with a bottle cage bolt, as the coach screw decided it didn't like its new job and fell off at Limehouse.