Found: Outrageous 64g Dura Ace Derailleur

64g Dura Ace Derailleur

There are self professed weight weenies out there who bolt on the lightest weight parts they can find, and then there are theses guys – dare we say light weight artists? Found over on the Light-Bikes forum, this stunning 64g (!) derailleur is the product of a duo who go by the handles of FastDad and Cola Wheat. What started life as a spare Shimano Dura Ace 7800 rear derailleur weighing a rather portly (comparitively) 180-190g, was morphed into the show stopper seen above complete with a carbon b-spring. Yes, a one-off carbon spring.

Check out the details, next.

 Original Dura Ace Derailleur

Tuned Dura Ace Derialleur

Based on the looks of things, Stefan who goes by FastDad is quite handy with a Dremel – this is part of where the art comes in. Not only was he able to get the weight down to a very impressive 69g before handing it off to Cola Wheat, but the lines of the cutouts are beautiful. By just looking at it you’d have a hard time figuring out it was done by hand. At the top is an exploded diagram with every stock piece weighed, with the modified versions and the addition of the first cage below.

Tuned Dura Ace Derialleur 2 Tuned Dura Ace Derialleur 1

The final result from Stefan is impressive enough as it is, but it gets better.

Carbon Spring

After the hand off was made to Cola Wheat, Thomas started his magic by building a carbon fiber b-spring! Thomas actually goes into pretty great depth on the creation of the spring which weighs just over 1g.

10g Cage 64g Dura Ace Derailleur 2

In addition to the beautiful anodizing, Thomas also provided the new Tron-esque derailleur cage and pulleys. Total weight for the entire cage is 10 grams.

64g Dura Ace Derailleur 3

All said and done you have a functional derailleur that weighs less than half of the original. I don’t want to know how many hours went into this thing, and I certainly don’t want to be around if it ever gets ripped off by an errant stick, but it sure is nice to look at.

Nice work.

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79 Comments
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Quinn
Quinn
9 years ago

but how durable is it?

Mr. P
9 years ago

Nerdiness at it’s finest. I love it!

Nice one FastDad and Cola Wheat!

P

mike creed
mike creed
9 years ago

You guys. This is what its about…thanks for making it.

Haywood
Haywood
9 years ago

nice work guys.

dwiz
dwiz
9 years ago

another item that while gaining lots of attention from the weight weenies of the world..but i ask you these questions:
how durable is this flimsy thing gonna be?
how AVAILABLE is this thing gonna be?
how much of a pain in the ass is servicing/repairing/parts/pieces gonna be.

is this gonna be one of those items where you can ride it a dozen times then have to replace and or service the crap out it……….one word for ya’ll—-SILLY

Marck
Marck
2 years ago
Reply to  dwiz

@dwiz – everything you posted is correct – it can also be said about any part of a F1 racecar – but that is how we evolve things and push the limits… one thing leads to another and so on…. be happy!

Steve
Steve
9 years ago

Great art of work !!!!!

Dillao
Dillao
9 years ago

If that doesn’t get your wheels turning… you’re probably a triathlete.

M.C. Slammer
M.C. Slammer
9 years ago

It’s art… Some get it, some don’t. It’s remarkable not only for it’s appearance, but for the level of skill and craftsmanship applied. Some aspects sport go beyond the utilitarian.

Rick S
Rick S
2 years ago
Reply to  M.C. Slammer

I agree with you 100%,Good take!

sardinian rider
sardinian rider
9 years ago

Impressive.
Find yourself spending a gazilion of euro for a swank-a-drool rear derailleur and see it crumble apart at the very first bad@ss chain crossing.

vectorbug
vectorbug
9 years ago

I love it. Are they taking orders?

Rob M
Rob M
9 years ago

dwiz, you do realize this is a one-off custom, right? Don’t worry, it won’t make it’s debut on your 2014 Cross Check… silly is right.

Mindless
Mindless
9 years ago

Weenies.

martin
martin
9 years ago

It wouldn’t work as the first half decent bump you get there is nothing to stop it from throwing the chain!!! ( you have to have an inner chain guide plate! )…..

David French
9 years ago

When my EuroMillions numbers come up, I’ll take a green one!

bin judgin
bin judgin
9 years ago

HARDCORE NERDS

WE SALUTE YOU!!!!

ant1
ant1
9 years ago

can’t spell silly without ill. this thing is badass.

bbb
bbb
9 years ago

I don’t care about the weight, function and durability.
I just can’t take my eyes off those jockey wheels.
Beautiful.

Lou
Lou
9 years ago

1. It’s a one off. It took like 6 months to complete by the parties involved.
2. Durability is irrelevant. If it makes it 1/10 of a mile then it has succeeded in being one of the most ridiculously light “functional” derailleurs ever built.
3. And who knows, a lot of stuff on bikes is there for a “what if” scenario. Chain catchers, chain tensioners, lawyer tabs, derailleur guide plates, etc. I bet this thing gets a lot farther than you would imagine.

David
David
9 years ago

A Weight weenie exercise just married up with an artist.
Gorgeous execution, yet it really too pretty to risk a ride with it.
And what about that scale, 4 decimal place accuracy on a gram?

satisFACTORYrider
satisFACTORYrider
9 years ago

that. is. badass.

Your Face
Your Face
9 years ago

That DOES NOT look like a campy seatpost. Why bother?

Chris
Chris
9 years ago

Not something I would ever want but I appreciate the workmanship that went into it. The over sized pulley bearings are actually kind of interesting though not having an inner cage plate seems like a sure fire way to get a dropped chain at the first bump.

myke
myke
9 years ago

That is money right there!

Marc Gibeault
Marc Gibeault
9 years ago

Incredible work.
Imagine halving the weight of a part already so light while still being functionnal.
And they didn’t start with a cheap overweight derailleur, it’s already top-of-the line!

ds
ds
9 years ago

Incredible. And high tech should always look like art. Question of total devotion in every domain !

What kind of bearing are in the huge jockey wheels of the 64g ? Needles ?

Congratulations and continue !

Andrew
Andrew
9 years ago

only having a one sided cage is not a big deal at all, Sunrace did it for a long time with no problems. Believe it or not Sunrace drivetrains actually worked pretty well, their spirit line had some cool design features like top normal front derailleurs (that one was weird), the no outer plate RD, and the cable pinch bolt on the RD was sometimes located ‘inside’ the derailleur, it was very elegant and worked well too.

Andy
Andy
9 years ago

Does it actually work? and any performance degradations?

Dex
Dex
9 years ago

By far the best component tooling I have ever seen. To know this was done by hand with a Dremel makes it that much more impressive. The carbon spring and anodization shows just how far the creators were willing to take the weight and style issue to the max. Serious kudos very well done!

generalee
generalee
9 years ago

i want jockey wheels like that!

aaron
aaron
9 years ago

I dont care about the weight, I just want it.

A.
A.
9 years ago

I think this may void the Shimano warranty. Think twice before doing this at home.

ACE
ACE
9 years ago

Will this last through an entire race?Who cares if it snaps before you take a left turn. Its pretty and light and and Ive got too much money.

WV Cycling
WV Cycling
9 years ago

I’m betting Shimano follows little weight-weenie projects like this behind the scenes to see whether they can improve and copy anything these guys do.

Never said that they would copy or even use the work, but I’m sure they like watching what others are doing for inspiration.

greg
greg
9 years ago

Beyond the functionality aspect, it is also a great design and style exercise. Like a show car that is kinda drivable- it could be a sign of things to come. Wouldn’t you want a derailleur that looked like that but was still bulletproof on your bike? I certainly would.

mk
mk
9 years ago

My singlespeed setup is still lighter

CtoF
CtoF
9 years ago

Love it!!! I would love to see it mounted on a bike with a black and red KMC chain running through it. THAT’S HOT!

jim
jim
9 years ago

a thing of beauty!
just enlarge the outer diameter of the pulley guide to match the chain.. you’ll have an instant chain guide/cage.
nice work!

Joshua Murdock
9 years ago

Possibly the coolest bike part I’ve ever seen. Wow. That really is incredible. Good work!

The Goats
9 years ago

Stunning! Big thank you to these guys for being devout (and crazy : ) enough to take it to the end.

XOXO

The Goats

JCL
JCL
9 years ago

Just to be complete and to show their dedication and savvy, they also designed a special tool for the “special” jockeys !!!

mountguitars
mountguitars
9 years ago

love it or hate, this is such a sick build!

MaLóL
MaLóL
9 years ago

badass

Gravity
Gravity
9 years ago

^ – Is that English?

NASH
NASH
9 years ago

@epo pusher. Metal on metal is fine if there is lubrication between the surfaces, jockey wheels are not a high load part such a wheel bearing.

The general name for this type of design is a bushing and is not commonly associated with (deleted).

CXisfun
CXisfun
9 years ago

@epo pusher: isn’t your chain/cassette/chainring combo metal on metal? Did that only last 10 minutes then epically fail?

Loki
Loki
9 years ago

Gorgeous, interesting and inspirational. Kudos and thanks to the mad men who made it.

ABW
ABW
9 years ago

Amazing. Makes me so happy that “tuning” a bike now has a definition more like that of the automotive/hot rod world, where you take what you have and make it work better/lighter/more attractive/etc. rather than taking what you have, throwing it in the recycling bin, and buying the next expensive part. Tuning should never be confused with upgrading.

Kark
Kark
9 years ago

@ epo pusher. you’re a fool. Metal on metal is commonplace in moving and rotational parts. e.g. bearings, sintered bronze or alum bushings, gears, sprockets etc.

perhaps think before you post nonsense and hypothetical gibberish.

ride
ride
9 years ago

So many haters.if you have love for the design and plain awesomeness of bikes then you understand why they took so much time to make this.it dosnt matter if it literally never shifts a gear.for all of you haters keep taking your whip in to someone else for service and shut your mouth.meanwhile people like us will push the envelope of of standard issue gear just to finish and say.damn.that’s sick.also I doubt that this is much if any less durable then a normal DA derailleur.I guess everyone should stop making concept bikes because they are not practical….Lets tell Reynolds to stop using carbon “spokes” on the rzrs because they are not practical.lets tell thomson to stop machining from billet because its time consuming.lets tell k edge to stop retrofitting di2 to work with xtr to have a electronic mtb drivetrain.lets stop the use of tapered head tubes and 30 mm spindles and thru axles because the old stuff worked fine.lets tell the guys who built the lightest road bike in the worls that they wasted their time.

ride
ride
9 years ago

Xx1 cassette?lame right?