強い自転車

フランスの道路は石畳みがたくさん。

フランス車はこのガタガタの石畳みに合った構造をしているそう。

もちろん、この道を自転車も走る。

自転車の強み

朝のモンサンミッシェルの石畳みの通りを自転車のシューズの音が響きました。

ここは車はもちろん入れない。 

あなた次第の自転車

情熱的にもクールにもにも見せる“DeMonchaux Porthos Di2”

オーダーメイドの自転車、あなたならどう表現しますか？
 www.dmcx.com

重さは見た目じゃない

以前、DeMonchauxバイクの写真を見た人から、「重そうですね」という質問を受けました。

確かにチタンなので丈夫だし見た目は重そうですが、車体は本当に軽いです。

しかもチェーンではなくカーボンを使っているDeMonchaux Porthos Di2の自転車は乗り心地も軽い。

ぜひ多くの人に体感してもらいたいと思います。

www.dmcx.com

Porthos Coming soon...

It is different than anything else.
It is Simple Design.
It is Strong.
It is Lightweight.
It is Refined.
It is  Finely Engineered.

Porthos is coming soon...

DMCX People, Taka & Pop

Two japanese bad boys in love with their Demonchaux Caps

Thank you guys!

DMCX People

Came across very nice people wearing Dmcx Caps.

Demonchaux Lafayette II Cafe Racer

Just finished a custom Lafayette II Cafe Racer styled.

http://s871.photobucket.com/albums/ab278/Demonchaux/?action=view¤t=4308dcd9.pbw

Demonchaux Lafayette II Amsterdamer

Demonchaux Lafayette II Amsterdamer

DMCX White tires 20x1.75 + Nitto B602 SL handlebar + DMCX track grips + Brooks B67 Leather saddle + MKS Sylvan Touring Alloy pedals

Singlespeed
V-brakes
Cromoly frameset + fork
13kg with pedals

Demonchaux Lafayette II Tuned V2 Fixie style

Demonchaux Lafayette II Tuned V2 2010 for SALE -NEW-

DMCX White tires 20x1.75 + Nitto B123 Steel NJS handlebar + DMCX track grips + Dia Compe MX122 brake levers + Grunge White saddle

Singlespeed
V-brakes
Cromoly frameset + fork
12kg with pedals
Price 45,000円税込み
Contact us

Wood bike

End of January a local wood furniture company asked me to help them create a wood bike for a Eco-friendly themed design show.

The challenge was to use local grown wood, Cedar, which would be 3cm thick for strength purpose and not bendible.
The bike had to look like a bicycle with a single crown (not a double crown like motorbike or Dh bikes)
And finally, the bike had to be delivered on Feb.15th and able to be ridden.

As time was short on hands, we skipped the brakes and made it a fixie wood bike.

Nearly everything has been custom built, custom hubs, wood wheels, custom steel lugged style wood fork (massive look) custom headtube, custom BB shell & seat tube piece, custom drop outs...Custom hand carved wood saddle and wooden MKS pedals.

The Hollowtech Crankset has also been rectified with a longer axle.

See more detailed pictures of the completed bike here

Demonchaux Lafayette II Tuned V1 for SALE

Demonchaux Lafayette II Tuned V1 2010

Michelin Jogger 20x1.75 + Nitto B201 AA silver handlebar + ODI grips + Polished brake levers + Sport Tourer Leather saddle
Singlespeed
V-brakes
Cromoly frameset + fork
12kg with pedals

New homepage preview

It took long time to make the new homepage but it is finally coming up!
Here is the new DMCX homepage preview:

DMCX

Tell me what you think of it, it is still time to change things

Keep moving

The ZR Ti (I really need to find a nicer name for it) concept bike is moving along.

Wheel size, has been decided to be 26" instead of 650c for more practicality.

The brakes will be cantilever type.


Road caliper are made to be light and aerodynamic somehow, but the braking power is not as powerful as Cantilever (or V-brakes)
Cantilever have a kind of "out of date" image since the arrival of MTB as mass market which was fitted with V-brakes and their "more powerful braking"
V-brake are powerful to block the wheel which is pratical for technical off-road riding

Blocking the wheels on a road bike is not practical, we don't want to block the wheel, this is when we lose control of the bike and cannot stop it (this is for this reason ABS is now standard on most cars and some motorbikes)

Well, coming bike to my concept bike.
The braking system will be Cantilver type. It offers best braking modulation with road type brake lever.
Why not Disc brake?
Because disc brake are heavier than rim brakes, also with road bike style brake lever, it is possible to mount only mechanical disc brakes, which are much heavy than hydraulic ones and finally, disc brakes will block the wheels too heasily on steep down hill roads.

Cantilvers are also mounted touring bicycles carrying a lot of weight around the world. This confirm their toughness and reliability.

Finally, the weight/cost performance is also great with Cantilevers compared with road caliper style.

Fast bike and braking surface

650c has become an exotic size now. It is still used in France but almost disappeared from french shops and suppliers as "randonneuse" and "cyclosportive" had become a kind of antique bikes when the fashion was big swing for the MTB.

It is wiser to make a road bike in 26" than a 650 size almost any store stock this size.
There is a small trend with the 650 randonneuse style but the market is tiny for sport type 650.
Looking at the tires makers catalogs and it is easy to confirm my thoughts.
Almost no tires are available for road use in 650c sizing (650x20 or 23 etc...)
But looking at 26" there is much more choice of width and pattern.

26" Vs 700c
Due to the exotism of the 650c I concetrate my work on the 26" sizing.
Why 26" instead of 700c
26" got advantage for mountains / alpine style road (hey, it is why MTB use this size at the beginning right?)
It is not only goof fit for small rider, it is also more performant for hill climb and and cornering down the roads.
Also, shortest spokes provide stiffer wheels.
And finally, smaller rim diameter and shorter spokes means less weight in rotation.

I noticed several times that while going down Norikura skyline road and other alpine roads at over 100km/h the rear wheel has not much grips when braking hard before cornering.

Mounting 26" offer a choice of high pressure clincher with wider section and still light as 700c clinchers

Demonchaux ZR Ti (Zero Rake) concept

I have been very busy recently with building cromoly frames but the ZR Ti (read: Zero mm Rake offset Ti bike) is the main focus at the shop.
The Beta version should be ready this month.
I'll keep developping the concept