Brompton chain coming offage problem

Yellow Fang

Legendary Member
Location
Reading
I have a problem with my Brompton: the chain tends to come off when I unfold it. Has anyone else ever had this problem, and if so, how did they solve it?
 

ChrisKH

Veteran
Location
Essex
I have never had this directly - which model do you have and how many miles has the chain done?
 
OP
Yellow Fang

Yellow Fang

Legendary Member
Location
Reading
I have an L3. I don't think the chain is all that worn. It was replaced about six months ago and it hasn't done an awful lot of mileage since.
 

stevew

Well-Known Member
Location
Orpington
Check the chain tensioner's spring tension to see if it moves freely but with a good amount of tension. If it's sticky it may not be following the chain when the bike is folded.
 

rob_mcp

New Member
I borrowed one which did this - but never got to the bottom of it. I suspect that stevew may be right It seemed particularly prone to this if I knocked the pedal back while unfolding it
My own has never done this
 
OP
Yellow Fang

Yellow Fang

Legendary Member
Location
Reading
It hasn't been doing it recently, but I haven't cycled it all that much. I suspect that either the chainwheel or the derailleur wasn't screwed in very tightly.
 
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