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Brompton cables rub on chain/ring

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drossall:
I've noticed that the rear cables tend to rub on the chain at the front of the chainring, as they pass behind the ring. I know I have limited scope to re-route them without affecting the fold. I'm not even sure about using a cable tie to pull them towards the frame more. Has anyone found a good solution to this? I've tried just bending/flexing the housings, but they spring back over time.

grams:
That's not a problem I've heard of before. Are they the correct length? Brompton cables need to be measured to the millimetre to sit right.

(this also makes using different brands with different stiffnesses potentially problematic)

drossall:
Pretty sure they're the factory fitted ones. It's a very low mileage bike. It may be that repeated bending (flexing) will do it, or maybe I can put a cable tie round the retaining clip on the seat tube.

But there are so many Brompton parts and add-ons that thought it just possible that someone might suggest one. I'm aware of how critical cable length and routing are.

grams:
Well the other thing to check is that they put the correct ones on - Brompton production line quality control is not always great. They normally have a letter code embossed on the outer itself - e.g. FU+M for Front brake upper housing on an M type.

drossall:
Now that's the kind of interesting snippet that you could only get here :)

Looks OK. I've got an FU+M (front brake), an L++M (rear brake), a G3+P (hub gear) and a GD+P (derailleur) on my P6R. What I did notice, on a second look, is that the four cables going to the back aren't in one bundle. The dynamo wire is tied to the derailleur cable, and it's those two that are flapping a bit towards the chain. I'll try just putting a fairly loose cable tie in to secure them to the other two. That will make a more rigid assembly that won't move from side to side so easily.

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