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My Dahon Mu Duo - a blend of old an new

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My Dahon Mu Duo - a blend of old an new

Old 10-12-09, 07:07 AM
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Originally Posted by vmaniqui
are you serious about this long wait ? why 4 years ? that long to manufacture the part or that long to scrub all the used bike stores in germany to look for the part ? does the day starts counting now ?
No, I was just being playful. It will take 4 weeks, but it'll feel like 4 years to me.
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Old 10-12-09, 10:22 AM
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Originally Posted by SesameCrunch
No, I was just being playful. It will take 4 weeks, but it'll feel like 4 years to me.
4 weeks will fly by.. it's when it gets into the 5th week you'll start spontaneous drooling ..

Can't wait to go for our inaugural 2 speed tour of the coast.. much like the vintage 3spd English roadster tours, only 33% less gears to worry about ..
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Old 10-12-09, 10:45 AM
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Originally Posted by SesameCrunch
No, I was just being playful. It will take 4 weeks, but it'll feel like 4 years to me.
that sounds better. one more question - how much did it cost you and where can i get this one ????

thanks,
vic
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Old 10-12-09, 03:05 PM
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Originally Posted by vmaniqui
that sounds better. one more question - how much did it cost you and where can i get this one ????

thanks,
vic
Bruce listed the link in an earlier post. Prices for the different hubs are on there too.
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Old 10-13-09, 02:25 AM
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Originally Posted by SesameCrunch
Bruce listed the link in an earlier post. Prices for the different hubs are on there too.
Check it out, it's a great site, lots of good stuff.
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Old 10-13-09, 09:18 PM
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Earlier I had written;
Originally Posted by MnHPVA Guy
It might be worth waiting for the new Sturmey S2C kickback 2 speed coaster. With expected sales of half a million a year I'd be surprised if there wasn't a 28h version for small wheeled bikes. Wonder if the 2nd gear is over or under 1:1.
I just found out the Moulton that was shown in London with the prototype of the hub had gears of about 50" and 70". The bike has 20" wheels and in the photo it's clear that the ratio of the belted cogs is closer to 2.5:1 than 3.5:1. So therefore it's an overdrive. Good for small wheels.

https://www.flickr.com/photos/1987134...7622545366532/

If the demand is high enough there could be two versions, overdrive for small wheel bikes and underdrive for big wheels.
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Old 10-29-09, 05:56 PM
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I had the great pleasure of visiting the mad folderista BruceMetras today at his Bat Cave. What a treat! Truly a fine collection of folders with sophisticated upgrades. The man has taste, if not common sense.

The highlight of the visit was riding the Mu Uno Duo. The Uno was light and fast. The Auto hub was incredible! Like magic. Two speeds, 54" and 75" on those 451 wheels were perfect for the ride we took. It was so much fun to have the Auto hub shift automagically. Incredible. The bike is beautiful to look at too. Sleek, black and sexy - just like Bruce .

I also got to ride his Pacific Reach Road. Very nice bike. It was a good thing my wife hid the check book before I went to visit him...

....and why, you ask, was I visiting the mad folderista?....well, that's a story for another thread....
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Old 10-29-09, 09:07 PM
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Originally Posted by SesameCrunch
....and why, you ask, was I visiting the mad folderista?....well, that's a story for another thread....
I'm guessing you got the Schlumpf from Bruce...
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Old 10-29-09, 09:19 PM
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Originally Posted by jur
I'm guessing you got the Schlumpf from Bruce...
Nothing slips by you, does it, Jur? Yup, Bruce is quite the Schlumpf connoisseur, and has indoctrinated me as well.
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Old 10-30-09, 08:58 AM
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Originally Posted by SesameCrunch

The highlight of the visit was riding the Mu Uno Duo. The Uno was light and fast. The Auto hub was incredible! Like magic. Two speeds, 54" and 75" on those 451 wheels were perfect for the ride we took. It was so much fun to have the Auto hub shift automagically. Incredible. The bike is beautiful to look at too. Sleek, black and sexy - just like Bruce .

I also got to ride his Pacific Reach Road. Very nice bike. It was a good thing my wife hid the check book before I went to visit him...
And here I thought the highlight was you getting to see a duomatic apart on the workbench .. .. fun to break away from work for 45 minutes for that 10.5 mile jaunt .. I would have sworn at one point you were up around 120 rpm .. did you have a chance to glance at the monitor??

Boy, can't wait for the 2010 bikes to see what you buy next ...
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Old 10-30-09, 09:14 AM
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Originally Posted by BruceMetras
Boy, can't wait for the 2010 bikes to see what you buy next ...



Originally Posted by BruceMetras
.. did you have a chance to glance at the monitor??
I did get up to 26mph on the Duo! I loved riding that thing. Dahon should make that a Special Edition!!!!
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Old 10-30-09, 09:29 AM
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Originally Posted by SesameCrunch

I did get up to 26mph on the Duo! I loved riding that thing. Dahon should make that a Special Edition!!!!
Actually, Garmin said you hit 26.9 mph .. but who's recording ..
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Old 11-17-10, 12:50 AM
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Hello,

i found the wonderful conversion of your Mu uno, just great!

Iīll get my Uno the next days and during winter i want to prepare a second wheelset with 451 rims and a Duomatik hub. But i was wondering about the alex r390 rims you are using. I havenīt found such ones for 24 spokes. Where did you get them? Probably i have to order anyway in US (up to now i havenīt found any dealer here in germany or europe). And what front hup you used?

For the rear hup i would like to use a 28 hole rim which fits perfect to the 28 holes duomatik. But for the front wheel i would be great to have less spokes....

Maybe you can give me some hints. Thank you and greetings from germany
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Old 11-17-10, 03:27 AM
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LOve it!

I can dream of the carbon Ori/Mezzo Surpaz with one of these. Carbon fibre frame with 2 speed hub, 7 killo territory ? ! Ebay search saved for this hub!

Sorry more questions..
How does the sturmey archer s2c compair?
Weight saving over a typical 9 speed set up anyone?

Are you putting a carbon crank or a beam seatpost on at all ?

Last edited by bhkyte; 11-17-10 at 03:58 AM.
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Old 11-17-10, 09:45 AM
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Originally Posted by Uno
Hello,

i found the wonderful conversion of your Mu uno, just great!

Iīll get my Uno the next days and during winter i want to prepare a second wheelset with 451 rims and a Duomatik hub. But i was wondering about the alex r390 rims you are using. I havenīt found such ones for 24 spokes. Where did you get them? Probably i have to order anyway in US (up to now i havenīt found any dealer here in germany or europe). And what front hup you used?

For the rear hup i would like to use a 28 hole rim which fits perfect to the 28 holes duomatik. But for the front wheel i would be great to have less spokes....

Maybe you can give me some hints. Thank you and greetings from germany
Hello my Uno friend from Germany!

I purchased the 451 rims and front hub from Bike Friday in Oregon, USA.. Their Tikit uses a narrow 74mm front hub as does Dahon.. B/F offered two grades of hubs at the time, I went with the premium hub which is very smooth and finished nicely.. I ordered the spokes from ThorUSA which are Sapim Strong, and were custom cut to size.. you will also need a short reach caliper brake for the front..


Originally Posted by bhkyte
LOve it!

I can dream of the carbon Ori/Mezzo Surpaz with one of these. Carbon fibre frame with 2 speed hub, 7 killo territory ? ! Ebay search saved for this hub!

Sorry more questions..
How does the sturmey archer s2c compair?
Weight saving over a typical 9 speed set up anyone?

Are you putting a carbon crank or a beam seatpost on at all ?
Thanks for the props! ... I haven't ridden the S2C, but I would think it is very similar to the kickback Duomatic.. on a personal note, I like the look of the Sachs hub better and the machine work on the internals is beautiful..

No idea on the weight savings (if any).. my Sachs is not light, I think it was right around 950g.. I had a very lightweight SDG post and seat on it for awhile, but I stuck the heavier stock post/pump combo back in.. I even put the kickstand back on.. no plans for a crank change until I wear out the stock part.. it would be fairly easy to go sub 20lbs with the Uno if wanted.
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Old 11-17-10, 09:55 AM
  #41  
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Hi Bruce,

thanks for information. Iīll get in contct with bike friday and hope to get rims and a front hub. Iīd prefer 28 spokes rear cause my duomatik has 28 holes :-)) and a front wheel with 24 or less... Hope iīll get them...

First i was thinking about the S2C but as you already mentioned the Duomatic is about 500gr. less weight!!!!

Iīm dreaming of a conversion to gates belt drive :-) Moulton offers the S2C with belt drive in the TSR2. The belt pulley should fit also on F&S Duomatik. And thorusa showed already that belt drive works on a mu frame.
But still i didnīt get any information how to get the belt pulley...

This (wheels and maybe belt drive) will be my winter project - and we will have winter here :-((

Thanks and greets
Roman (Uno)
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Old 11-17-10, 10:43 AM
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Originally Posted by Uno
Hi Bruce,

thanks for information. Iīll get in contct with bike friday and hope to get rims and a front hub. Iīd prefer 28 spokes rear cause my duomatik has 28 holes :-)) and a front wheel with 24 or less... Hope iīll get them...
I have a spare, new, 28h Alex 390 rim here if you find you need one and can't get one on your side of the world.. Velocity also has a nice selection of 451 rims... I used Velocity rims for my Duomatic 700 bike...






Originally Posted by Uno
Iīm dreaming of a conversion to gates belt drive :-) Moulton offers the S2C with belt drive in the TSR2. The belt pulley should fit also on F&S Duomatik. And thorusa showed already that belt drive works on a mu frame.
But still i didnīt get any information how to get the belt pulley...
The new TSR2 uses Delta C-Drive components, not Gates Carbon Drive .. before you start buying expensive belts and cogs, make sure and take measurements of your bike and input ratios in a gear inch calculator .. there are very few selections in acceptable belt lengths and cog sizes.

Originally Posted by Uno
This (wheels and maybe belt drive) will be my winter project - and we will have winter here :-((
Thanks and greets
Roman (Uno)
I toyed with belt drive for mine, but never pulled the trigger.. there are new products (like the Schlumpf belt drive system), and Gates with their newest iteration .. for now, I run with what works and just keep my chain really clean (easy to do with only two sprockets)..
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Old 11-17-10, 11:05 AM
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Originally Posted by BruceMetras
I have a spare, new, 28h Alex 390 rim here if you find you need one and can't get one on your side of the world.. Velocity also has a nice selection of 451 rims... I used Velocity rims for my Duomatic 700 bike...

I already checked the Velocity Fusion. I could get it in 28 hole version from a shop in UK.
Do you know if the Alex R390 is available in 28 holes - or maybe you have one :-)





The new TSR2 uses Delta C-Drive components, not Gates Carbon Drive .. before you start buying expensive belts and cogs, make sure and take measurements of your bike and input ratios in a gear inch calculator .. there are very few selections in acceptable belt lengths and cog sizes.

That i didnīt know, thanks a lot.

I toyed with belt drive for mine, but never pulled the trigger.. there are new products (like the Schlumpf belt drive system), and Gates with their newest iteration .. for now, I run with what works and just keep my chain really clean (easy to do with only two sprockets)..
I know about the Schlumpf belt system. I use a Schlumpf drive in my daily bike :-). So i always check whats new from Schlumpf...

The belt thing is more a dream, main important are the wheels and the Duomatik - and maybe a handlebar in bullhorn look. But alos hard to find in the 1" diameter in black...

Greets and thanks
Roman
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Old 11-17-10, 11:07 AM
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Oh, sorry !

just realized that you have a 28h R390 - great. Iīll keep in mind !!

Letīs see what bike friday answers...
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Old 11-18-10, 01:44 AM
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Originally Posted by BruceMetras
I have a spare, new, 28h Alex 390 rim here if you find you need one and can't get one on your side of the world.. Velocity also has a nice selection of 451 rims... I used Velocity rims for my Duomatic 700 bike...
I think i have to ask you for the 28h rim. I can get the 24h rims and hub. Here i could get the Velocity Fusion and the Alex DA22 - but only in 28, 32 or 36h.

Please let me know how to go on. Up to now i cannot sent a PM (less than 50 postings :-(( ) so maybe you can get in contact with me with PM.

Thanks
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Old 05-25-11, 02:29 PM
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Is this the hub? I've been looking but a lot of the sources from a few years ago seem to be gone...

"Torpedo Automatic A2110 with Coaster Brake"
https://www.torpedo-coasterbrake.com/...-speed-hub.htm

Thanks!
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Old 05-25-11, 03:18 PM
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Have you seen the new Sturmey Archer S2? New kickback hub with a without coaster brake. I believe Nexus is also coming out with one soon. The hub used on Bruces bike was NOS.
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Old 05-25-11, 03:48 PM
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Originally Posted by ryandeussing
Is this the hub? I've been looking but a lot of the sources from a few years ago seem to be gone...

"Torpedo Automatic A2110 with Coaster Brake"
https://www.torpedo-coasterbrake.com/...-speed-hub.htm


Thanks!
Yes, that is the hub I used in both of my bike mods... to be released this year from SRAM will be the A2 .. an automatic 2 speed hub based on the Sachs unit .. reliable info has been sketchy at best ..
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Old 05-25-11, 05:17 PM
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SRAM announced a new 2 speed automatic hub recently...
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Old 05-25-11, 06:23 PM
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Thanks - I've been loving my Dahon Speed for a few years, but I really don't need the 8 gears and keeping the whole shifting apparatus in shape gets to be a drag.

In NYC I feel like the 451mm wheels are a godsend b/c I'm always in a pothole or on a curb, but otherwise I think your mod represents a near-perfect commute bike.

I suppose I'll spring for the Uno, and then wait for the new SRAM hub to materialize
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