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Shimano Alfine 8 speed hub on a Brompton?

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Shimano Alfine 8 speed hub on a Brompton?

Old 02-10-09, 12:31 PM
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Originally Posted by euhmoins
Hi parcoju,

What about the chainline ? It is well aligned ?
I actually haven't laced the hub up to a 406 rim yet. They are being shipped to me as we speak. The hub is currently laced to a 26" (559) rim and I have not used it in it's current stale.

As for chainline, I cannot answer you specifically, but I can tell you that internal gear hub (IGH) and coaster brake cogs, if they are bigger than 16 teeth, are dished, so you can flip them over (assuming you can get that circlip off....) to adjust chainline. Another way to hack the chainline is the use of chainring spacers.



I have done this with my fixed gear and it works great.

Originally Posted by euhmoins
Hi parcoju,

Furthermore, I wonder how much the removal of the dust cap impacts the longevity of the Alfine.
I use my bike everyday, whether it rains or not.
Sheldon Brown did it to both his Nexus 7



and Nexus 8



so I'm guessing it should work?
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Old 04-05-09, 02:55 PM
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test
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Old 04-05-09, 03:00 PM
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Hi all. Would like to revive this thread!

I plan to add the following to my favourite folder; my raw lacquer brommie

1) New front Son hub and replace standard front light with Busch and Muller LED/standing light combo. Will need slight mods not to impact front luggage bracket etc.
2) Love the 8 speed Simano Alfine hub so hope to get this fitted by widening the rear triangle and using a trigger shift on right handlebar to replace 2 old Brompton shifters.

LBS said hub mod should not impact the fold of the wheels fitting together neatly. I believe Steve Parry's Rolhoff mod presented no problems. Opinions welcome!

Hi to all my old BF friends on the folding bikes section!
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Old 04-05-09, 06:17 PM
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1 - For what it's worth, the Edelux fits fine on my S-bar Brompton with the Schmidt/Brompton bracket available from SJS Cycles (not sure if the B&M light mounts differently). There is no interference when the front luggage is mounted.

2 - I put an SA 8-speed on my Brompton and the biggest issues were cable routing and adapting the chain tensioner. I ended up using the same frame-mounted cable pulley that is used on the 3-speed and added an inline cable length adjuster. The 2-speed chain tensioner was easier to modify than the 3-speed version (although you could make a bracket for the 3-speed to space it further from the axle center).

You might also need a different front chainring to get a reasonable gearing range with the Alfine. I think the minimum rear cog is 16 teeth, which would make any of the standard Brompton chainrings a bit small (in my opinion).
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Old 04-06-09, 09:56 AM
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why don't we wait for brompton to make a frame with 135mm OLD? life would be much easier.
or is it wishful thinking??
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Old 04-06-09, 10:07 AM
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with a 135 OLD, a capreo will fit in as well
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Old 12-18-09, 02:28 PM
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Noob question, but what if you do not install the 4mm locknut? Wouldn't the hub be supported by the pressure of the frame and outer nuts? Or it will completely fail?
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Old 12-18-09, 04:07 PM
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Another option is the S-RF5. It weights less (1090g) and 5 gears seem to be enough.



From Flickr: https://www.flickr.com/photos/door2summer69/4124379238/
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Old 12-19-09, 02:47 PM
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Given the present constraints, it might be easier to go with a Schlumpf drive to widen the gear range. Unfortunately, it will be more expensive; but we know the the Schlumphf works well within the Brompton framework.
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Old 03-11-10, 12:00 PM
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I found easier to install a Nexus 7 than installing the new Sturmey Archer 8 due to the chainline and bigger sprocket. The sturmey archer gets noisy in a few gears, but so far no skipped gears. Will post pics as soon as I get my camera back.
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Old 03-12-10, 09:27 AM
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Originally Posted by pibach
Another option is the S-RF5. It weights less (1090g) and 5 gears seem to be enough.



From Flickr: https://www.flickr.com/photos/door2summer69/4124379238/
The SRF5 has to be the most underrated hub out there. I was not happy with the Nexus 7 at all and if the 8 speed requires extensive mods, why not try the 5 speed. I have a Dahon in 5 speed and set it up so most of my riding is in 4th. Therefore giving me three low gears and 1st being very low! In fact, I can climb a mountain in that gear! I was surprised when you set up the 5 speed in this manner because I can't imagine the 8 speed having a lower gear. My 1st gear feels lower than my touring bike. Even though I have one high gear, I'm fine with this because it's actually too high and I hardly use it.

Last edited by Dahon.Steve; 03-12-10 at 09:37 AM.
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Old 08-17-10, 10:10 PM
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Hi
i've been searching online retailers for SRF5, but no success so far.
does anyone know where I can purchase this?

thanx in advance

Last edited by chrgd; 08-17-10 at 10:10 PM. Reason: wrong quote
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Old 08-07-21, 10:50 AM
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everyone says this Ben from Kenetics is a "good" guy. my dealing so far is meh ...
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Old 08-07-21, 11:39 AM
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Originally Posted by jackhudson
everyone says this Ben from Kenetics is a "good" guy. my dealing so far is meh ...

Did you bother to look at the fact that you're leaving a negative comment about a person/company in a thread that's been dead for about 11 years? Kinda a waste of time. wouldn't you say?
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Old 08-07-21, 12:28 PM
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Ben enlarged my Brompton titanium rear triangle to 135mm and provided a Rohloff rear wheel for it.

Nice, clean job.

Its now riding since 5 year without any problem.

The only problems I heard with Ben is delivery delay which is probably worse at this moment due to the shortage of bicycle components.
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