Specialized Shiv Carbon Fiber Tandem – AKA: The Supersonic Divorce Machine


Found by Xterra triathlete stud Conrad Stoltz while lurking around Specialized HQ, this one-off carbon fiber tandem is based on Specialized’s 2010 SHIV time trial bike.

Made to be as aero as possible, everything that can be integrated is, including the computer, aero bars, brake and shifter cables and even the front drivetrain.  The leader pedals a crankset linked to the stokers’ via an internal shaft drive.

There are a couple of other interesting tidbits worth noting:  First, those are SRAM carbon deep V rims laced to Specialized’s Roval Rapid Star hubs (which, interestingly, are no longer shown on their website).  Second, the Stoker has no brake levers.

More pics after the break…


Non-adjustable seat posts mean it better fit…or that it was made with specific riders in mind.  Look how low the stoker’s face would be…


Fully integrated aero bars and computer, among other speedy touches, led Stoltz to dub this the “Supersonic Divorce Machine.”


The SHIV tandem uses disc brakes front and rear with hidden cables.  Not sure if they’re hydraulic, which would mean some serious engineering to the brake levers, or cable actuated.

Check out more photos on Conrad’s blog.  Found via BikeRadar via VeloGogo.


cheeken - 12/30/09 - 2:17pm

Supersonic Divorce Machine is the greatest three-word phrase ever. And using it to describe this bike was genius. Now I want to start a rock band called Supersonic Divorce Machine. hahahaha….I can’t stop laughing.

Tan - 12/30/09 - 3:31pm

Here’s a short video interview with Robert Egger talking about this S-Works tandem concept: http://twitvid.com/914E9
You can connect with us at http://twitter.com/iamspecialized

Bike Carson » Cycling News - 12/30/09 - 6:30pm

[…] sure is fun to look at. Here’s a full carbon, time-trial style road tandem from Specialized over on BikeRumor.com. Check out that riding position…yikes!  Wouldn’t want to be the stoker on that […]

Michael - 12/30/09 - 9:12pm

Stokers rarely have brake levers on tandems.

Uri - 12/30/09 - 11:30pm

Those brakes appear to be hydraulic. How’s that work with Red levers?

Mick - 12/31/09 - 12:33pm

Like Michael Mentioned, Stokers rarely if ever have brake levers, they often have hoods (& in cases non functioning levers) for comfort… This is more than likey a non or minimal functioning show bike (the bicycle equivalent of a show car) … ie: no front deraileur… Finally if those brakes are actually functioning, they have to cable actuated discs’, no way SRAM have a hydraulic RED lever… FWIW, this seems like the ideal application for Di2
Cannondale was renown for this back in the 90’s. A great incubator for out of the box thinking & development of new ideas & concepts.

Too bad we rarely, if ever see this kind of stuff at interBike these days.

Editor - 01/01/10 - 10:12pm

That’s cause most of the big companies (Trek, Specialized…) have stopped showing their bikes inside the show at Interbike, and not much sense in bringing a ridiculously expensive one-off beauty to the dirty, dusty Outdoor Demo!

So stokers don’t have brakes? Learn something new everyday…thanks for the comments!

jocko - 01/04/10 - 5:37pm

More pics pleeeeeeeeaaaaaasse!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Make me one, it’ll still be cheaper than actual divorce

[…] his full story (with instructions!) on this project here.  If the Specialized Carbon Tandem is the Supersonic Divorce Machine, then this tandem unicycle is the Slow Road to […]

[…] Spotted. […]

adam - 02/09/10 - 12:07am

This bike is made of plastic….Specialized has a 3D printer to create there frames and build them up for shows…. sit on one and thats the end of the bike. This is a concept like most other bikes on the site… designed for attention only. shaft drive? Really? Way too much friction for a high performance machine. Magura hydraulic brakes with Red shifters? Okay. Right. If no one rides the bike the levers don’t have to connect the brakes. Since the plastic bike will never be ridden, there’s no need for real brakes. Since it will never be ridden, there is no need for adjustable fit, front derraileur, adjustable stem lenght, real shaft drive. The big S’s designers are way ahead of their engineers.

greg - 02/18/10 - 7:26am

ASHIMA have just been showing a cable- acutated hydraulic disc brake for road bikes, using the cable from STI/ Ergo/ whatever to squeeze a stem- mounted master cylinder…

[…] Bike Rumor posted pictures, taken by Conrad Stoltz, of this “one-off carbon fiber tandem based on Specialized’s 2010 SHIV time trial bike”. Wow! I want one…or I should say, “I want it” since there are no others in existence. […]

[…] carbon fiber tandem could give the Shiv prototype a run for it’s money.  At just 7lbs for the frame, the complete bike is only 23lbs, which […]

[…] up a lot of time.  One alternative is riding a tandem, but I’ve heard tandems referred to as divorce machines, so I think I would treat that as an absolute last resort — to be considered right after […]

Graeme - 12/06/10 - 12:56pm

Man,this is a sight for sore eyes, plastic or not…Are there any companies that manufacture carbon fibre racing tandem? Can someone send me a link to these sites

eric weall - 12/03/11 - 2:56pm

ive got a terry dolan carbon tandem,this is a looker.nothing compared with this!

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