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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 04-14-11, 01:23 PM   #1
vogtro
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SA trigger shifter mod on a Brompton 6sp?

I just ordered my first bespoke S6L-X Ti Brompton and am already thinking about some mods I'd like to do.

During my test ride the one thing I wasn't crazy about the stock hub shifter, and I was wondering if I could swap it with something like this:

Sturmey Archer S30 Trigger Shifter http://www.sturmey-archer.com/produc...ers/cid/3/id/7 It is designed to work with SA classic ratio 3 speed hubs. Are there any foreseen installation issues/caveats to doing this swap?

These are some other mods I'd like to do:

- Change out crummy (IMO) stock brake levers with Avid speed dial SL's
- Replace stock grips with ergon grips
- Add a quick release lever on the stem
- Removable SPD type MKS MM-Cube pedals
- Change out standard Brompton roller wheels for rollerblade or scooter wheels
- Switch saddle to my 1990 classic selle italia flight

I'm very excited to get the bike and look forward to getting some input. Please let me know what you think!
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Old 04-14-11, 02:40 PM   #2
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Looks to me as though you bought the wrong bike.
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Old 04-14-11, 02:54 PM   #3
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I've wondered whether it's possible to switch the frame clamps to a QR system; doesn't look to me as though it's viable, unless perhaps you were able to create your own QR lever with the right specifications.
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Old 04-14-11, 05:25 PM   #4
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Looks to me as though you bought the wrong bike.
Bought the wrong bike? Please indulge me. To clarify, I love the Brompton as-is, I just wanted to see if it was possible, or if anyone has tried to upgrade the cockpit.
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Old 04-14-11, 05:30 PM   #5
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I guess I should have been more clear... I want to install a quick release for the handlebar clamp, so that the handlebar can be twisted for proper folding with the Ergon barend grips. This has already been done here with great instruction using a seatpost clamp QR: http://www.bikeforums.net/archive/in.../t-400500.html

What I'm more interested in is whether I can upgrade the shifters...
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Old 04-14-11, 05:31 PM   #6
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I think shimano BL-R550 brake levers look rather nice.

Ah, you meant a QR on the top of the stem (of course).
Yeah, no reason I can see why any of those mods would be problematic.
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Old 04-14-11, 05:44 PM   #7
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I have the classic steel trigger, It sits on top of the bar, M type.

You can get thumb shifters 1 for each, NIG will not go odd neutral if you don't hit the gear exactly..
and the left lever will shove the chain back and forth fine..

but if you want that lever you featured why not, S bar gives you the space..

get short bar end Ergons, GC2 .. and the fold will go fine.

Last edited by fietsbob; 04-14-11 at 05:52 PM.
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Old 04-14-11, 05:51 PM   #8
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http://twowheelerdealer.com/product/...1251-qc294.htm will this work?
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Old 04-14-11, 05:52 PM   #9
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Originally Posted by fietsbob View Post
I have the classic steel trigger, It sits on top of the bar, M type.

You can get thumb shifters 1 for each, NIG will not go odd neutral if you don't hit the gear exactly..
and the left lever will shove the chain back and forth fine..

but if you want that lever you featured why not, S bar gives you the space..

get short bar end ergons, and the fold will go fine.
Thanks so much for this info!
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Old 04-14-11, 05:52 PM   #10
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Although this would look great http://twowheelerdealer.com/product/...1252-qc294.htm
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Old 04-14-11, 05:53 PM   #11
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That's pretty nice and simple as well...
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Old 04-14-11, 05:55 PM   #12
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You'd have to change the handlebar for something like this, i'd assume.
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Old 04-14-11, 05:57 PM   #13
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maybe in a bike Friday H bar, on a back end, .. the center sleeve is 1"
you could fit reverse pull levers in the front end.

straight out of the end of a straight bar will need bigger ID , i suspect.
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Old 04-14-11, 06:07 PM   #14
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Originally Posted by fietsbob View Post
maybe in a bike Friday H bar, on a back end, .. the center sleeve is 1"
you could fit reverse pull levers in the front end.

straight out of the end of a straight bar will need bigger ID , i suspect.
I do like the looks of the H bar. Thanks
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