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Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

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Old 03-13-14, 11:17 PM   #1
Ritterview
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Co-Motion Macchiato Di2 at NAHBS

Its intersting to see what Co-Motion is bringing to NAHBS in their performance entry. It features oft discussed items here, such as Di2 (is that standard RD cage?) and TRP Spyres (180 mm rotors?). I've bolded other IMO interesting features, includng the new Rolf Prima Carbon disc tandem wheels.


MACCHIATO DI2 TANDEM

Performance-hungry athletes seek out tight, accurate handling, proven components and a company they can believe in. Co-Motion Cycles builds every Macchiato with custom sizing specifically for each captain and stoker, and it delivers on all accounts. Using proprietary ACMUltra7 zonally-butted 7005 aluminum tandem tubing, specifically engineered for the Macchiato. At 25.8 lbs with the optional Rolf Prima carbon wheels and DuraAce 9070 Di2 components, the Macchiato isn’t just light it is simply the best-performing tandem on earth!

This limited edition Macchiato tandem displays a special paint scheme, with design cues from the Gulf Racing McLaren GT3 endurance sports car. Using a reverse masking processes with custom colors, and House of Kolor pearlescent paints, all performed in-house.

Utilizing a new Co-Motion designed tandem-specific carbon tapered fork, and in-house machined ACMUltra7 aluminum tapered head-tube. Internal Di2 cable routing and Shimano’s new E-tube with internal battery system. The new 2014 Macchiato joins the road disc revolution, with the updated TRP Spyre calipers and 180mm rotors. With features like Shimano 11 speed components, FSA SLK carbon cranks, Gates carbon timing belt, Interchange Disc drop-outs, and PressFit BB30 bottom bracket and eccentric. This tarmac eating, high-performance tandem is ready for the most challenging stretch of pavement or mountain descent.







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Old 03-14-14, 07:32 AM   #2
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That's cool, but did you also see their Carrera tandem, which incorporates a Bosch e-drive system and Gates belt drive? Very interesting, and might open up tandeming for a lot of folks that otherwise might not be able to ride (much like e-bikes have done in general, especially in Europe).

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Old 03-14-14, 07:43 AM   #3
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I noticed those wheels are listed at only 1630 grams on the Rolf site. That weight offsets some weight penalty that comes with disk brakes.
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Old 03-14-14, 07:44 AM   #4
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That's cool, but did you also see their Carrera tandem, which incorporates a Bosch e-drive system and Gates belt drive? Very interesting, and might open up tandeming for a lot of folks that otherwise might not be able to ride (much like e-bikes have done in general, especially in Europe).

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Is a bike with a motor a bike or a motorbike?
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Old 03-14-14, 08:02 AM   #5
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I noticed those wheels are listed at only 1630 grams on the Rolf site. That weight offsets some weight penalty that comes with disk brakes.
But the discs would also offset the aero advantage of the deep sectioned rims.

Noth sure there's any wind tunnel data available, but my bet is those wheels are slower than alumninum Rolfs with rim brakes.
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Old 03-14-14, 09:16 AM   #6
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Is a bike with a motor a bike or a motorbike?
The e-bike people have been very clever in keeping these bikes classified as bicycles, not motorbikes (or motorcycles). The trick is that the e-bikes "boost" pedaling (usually), rather than being the sole propulsion source, and are also able to be pedaled alone without the use of the motor. See Electric bicycle - Wikipedia, the free encyclopedia
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Old 03-14-14, 10:05 AM   #7
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The e-bike people have been very clever in keeping these bikes classified as bicycles, not motorbikes (or motorcycles). The trick is that the e-bikes "boost" pedaling (usually), rather than being the sole propulsion source, and are also able to be pedaled alone without the use of the motor. See Electric bicycle - Wikipedia, the free encyclopedia
I was referring to a more common usage and definition. If it has a motor that is used to propel it forward then it is motorized vehicle regardless of licensing regulations. From your link:

Quote:
E-bikes use rechargeable batteries and the lighter varieties can travel up to 25 to 32 km/h (16 to 20 mph), depending on the laws of the country in which they are sold, while the more high-powered varieties can often do in excess of 45 km/h (28 mph)

Last edited by waynesulak; 03-14-14 at 10:09 AM.
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Old 03-14-14, 12:35 PM   #8
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I noticed those wheels are listed at only 1630 grams on the Rolf site. That weight offsets some weight penalty that comes with disk brakes.
A couple thousand bucks for the wheels, not to mention the astronomical price of the DA Di2 11spd, which also helps to reduce the weight of bike & wallet.

Cheesy stoker bars - no bling there.

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Old 03-14-14, 12:45 PM   #9
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That's cool, but did you also see their Carrera tandem, which incorporates a Bosch e-drive system and Gates belt drive? Very interesting, and might open up tandeming for a lot of folks that otherwise might not be able to ride (much like e-bikes have done in general, especially in Europe).

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That Carrera with the Bosch drive looks really weird with a smaller front timing ring than rear timing ring. I guess the ring doesn't turn at the same speed as the cranks, and I'm sure they have figured it out so that it works, but it sure looks odd. Also, I assume that they've added horizontal rear dropouts so that both the timing and drive belts can both be tensioned since there is no eccentric BB at the front.
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Old 03-14-14, 01:51 PM   #10
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That is a beautiful bike. Fun to dream about.
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Old 03-14-14, 03:50 PM   #11
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That Carrera with the Bosch drive looks really weird with a smaller front timing ring than rear timing ring. I guess the ring doesn't turn at the same speed as the cranks, and I'm sure they have figured it out so that it works, but it sure looks odd. Also, I assume that they've added horizontal rear dropouts so that both the timing and drive belts can both be tensioned since there is no eccentric BB at the front.
I'm pretty sure it has a rear eccentric. You can see the big shell behind the cranks and the axle is off center as it would be with an eccentric.

The rear dropout looks weird. It has a sliding dropout with maybe a thru-axle.
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Old 03-14-14, 04:35 PM   #12
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A couple thousand bucks for the wheels, not to mention the astronomical price of the DA Di2 11spd, which also helps to reduce the weight of bike & wallet.

Cheesy stoker bars - no bling there.
And how much is a new S&S Calfee frame + colour component change?
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Old 03-15-14, 01:36 AM   #13
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I'm pretty sure it has a rear eccentric. You can see the big shell behind the cranks and the axle is off center as it would be with an eccentric.

The rear dropout looks weird. It has a sliding dropout with maybe a thru-axle.
BB30 on rear...that's why it's so large.

Rear dropout/derailleur hanger combination is replaceable. Cool feature....

And since when did we all become so concerned about cost??? Velocity of money, baby!!
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Old 03-15-14, 01:30 PM   #14
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BB30 on rear...that's why it's so large.

Rear dropout/derailleur hanger combination is replaceable. Cool feature....

And since when did we all become so concerned about cost??? Velocity of money, baby!!
I was referring to the Bosch Carrera. Regardless of BB type, the axle is off-center which indicates an eccentric is in place there.



I suspect with this bike (no granny) that most of the load will be transferred via the chainring bolts effectively tying together the two rings and offsetting each other's torque. So, most potential for overloading the spider arms could fall to the stoker alone.

One of my favorite current projects is implementing the same-side belt drive. I can't see much from the above photo, but it appears they may have only used chainring spacers (effectively washers) to gap the 2 - 12mm CenterTrack belts. That is a lot of space to create and doubtful it could be obtained without spacing both inner and outer rings. You can see the outer gates ring is not sitting on the spider arm shoulders. If the inner ring is also beyond the spider arms, then neither is fully supported and rely soley on the chainring nuts/bolts. Aussie FB friends have shredded a few sets of FSA crank spiders, so a production release of this tandem (if this is not just a one-off) might need a bit of tweaking to ensure the design is sound. It could probably use a good 20k miles put on it to confirm. Any takers Zonatandem?

Just my musings. Comments?

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Old 03-17-14, 02:30 PM   #15
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Co-Motion won Best Tandem at NAHBS.

Congrats to Co-Mo!
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Old 03-17-14, 06:59 PM   #16
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Co-Motion won Best Tandem at NAHBS.

Congrats to Co-Mo!

I agree ....well done CO-MOTION !!
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