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Old 03-14-14, 03:50 PM
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twocicle
Clipless in Coeur d'Alene
 
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Join Date: Mar 2012
Location: Coeur d'Alene, Idaho
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Bikes: Tandems: Calfee Dragonfly S&S, Ventana ECDM mtb; Singles: Specialized Tarmac SL4 S-Works, Specialized Stumpjumper Pro, etal.

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Originally Posted by Chris_W
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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