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Brompton Brakes and Gears Cable Replacements

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Brompton Brakes and Gears Cable Replacements

Old 01-12-14, 12:15 PM
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Ciwan
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Brompton Brakes and Gears Cable Replacements

Hi Guys

It is now 2 years since I got my 2011 6 Speed Brompton. I have ridden in wet weather a lot. These days I do bike maintenance weekly (clean chain and oil it, plus tyre pressure) however still when I change gear, the change is not sudden, it take it like a second or two, then it changes. My guess is that the cables have had so much dust and dirt in them, that movement is restricted.

So I would like to replace the brakes and gear cables. I have two questions:

1) How hard is it? Are there any instructional videos? Only one I can find was about how to position them (official brompton channel), not how to actually replace them.

2) Can you link me to the ones I need please? I go to SJS Cycles, but there are so many listed that I am worried I might buy the wrong ones

Any help would be greatly appreciated.

Thank You.
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Old 01-12-14, 01:07 PM
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I have to guess about your Mechanical competence on this given your questions ..

Its not hard , but I started working on my own Bikes when JFK was still breathing.



Change which gear the 2 on the outside or the 3 inside the Hub?


no they are not sudden like a light switch , you are making an unrealistic demand ..

maybe you will like a High end Di2 race bike drivetrain better?


What side of the Atlantic are You?

maybe you can go back to the Dealer and say "make it So"
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Old 01-13-14, 05:59 AM
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Brompton do ready made cable sets in the correct lenghts and afaik the cable inners are all Teflon lined ensuring this aspect is sorted, giving you a slicker cable that returns better than a standard inner. Essential on the long cable runs on a small compact folder.
If you want a slicker cable set up that will return better Teflon lined outer cables can be used, but these will need cutting to lenght. If you do this you need a good set of cable cutters.

Lastly add a touch of light lubricate even to a Teflon cable.
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Old 01-13-14, 06:51 AM
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Thanks Bhkyte. The ready made ones from Brompton are what I'm after, but they have so many options on SJS Cycles, I don't know which is the correct set to buy for mine :/
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Old 01-13-14, 11:44 AM
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Correct set is what came on it in the 1st place..

S bar set is shorter M Bar set is Longer , H ,longer still ..

The folks at SJS have an Email Address and A telephone to communicate with them directly .

Now, Brompton,
They have Bought Jagwire's housing and the Coated cables for their Manufacturing , Now..

It is possible, If you have sufficient Tools, to Cut nad finish Housing ends, and install replacement cables ,
matching what you Have already ,for length.. cable cutters , a file or bench grinder and so Forth.

One thing I am Mindful of , having worked on Women's Bikes that also have the brake cable in a U bend ,
entering from the Bottom of their side pull Brake caliper.. water Puddles in the housing..

The Bellows they add to Brompton's, now, Helps,
(I added some from V brakes to the Mk 2 I had for awhile),

But they are not always staying in Place ..

I just modified Mine , with the little doughnuts supplied other bikes, to keep open cable runs
from rattling against frame tubes.

... is what I filled the gap above the bellows boot,
so it stays in contact with the bottom , so as to resist water entry.

another possible Mod ; a split in the housing at its lowest point , joined with a sleeve to retain function,

But offering a Drain Point so water will leak back out.

Last edited by fietsbob; 01-13-14 at 11:51 AM.
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Old 03-16-18, 05:22 AM
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I'll piggy-back on the thread.

On a 2014 Brompton, I'd like to change the derailleur cable, ie the left-side shifter.

Even a 2mm hex key is too big to loosen the bolt:



How do you undo the cable?

Thank you.

--
Edit: It requires a 1,5mm hex key.

Last edited by Winfried; 03-16-18 at 08:57 AM.
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Old 03-16-18, 07:15 AM
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Going back the original post...slow shifting gears in the hub, not the two speed shifter can be addresses by putting a few ccs of oil in the hub through the right hand axle after taking the shifter rod out. I use synthetic 5-20 car oil that is liquid in all weather, and a little when the hub gets noisy again as it slowly seeps out.
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Old 03-16-18, 03:38 PM
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Originally Posted by Winfried View Post
I'll piggy-back on the thread.

On a 2014 Brompton, I'd like to change the derailleur cable, ie the left-side shifter.

Even a 2mm hex key is too big to loosen the bolt:



How do you undo the cable?

Thank you.

--
Edit: It requires a 1,5mm hex key.
You get the right size key is the answer. Just changed mine with a key bought from Bricomarché, sans problème.
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Old 03-16-18, 03:55 PM
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It's set screw..
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Old 03-16-18, 11:13 PM
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Originally Posted by 12boy View Post
Going back the original post...slow shifting gears in the hub, not the two speed shifter can be addresses by putting a few ccs of oil in the hub through the right hand axle after taking the shifter rod out. I use synthetic 5-20 car oil that is liquid in all weather, and a little when the hub gets noisy again as it slowly seeps out.
Apart from the fact this is incorrect - sounds like a faulty hub - I’d imagine that, after 4 years, the OP has this sorted.
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