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B(ike)log — Chainrings

Elliptical Chain Rings Don’t Work (Because You Won’t Let Them)

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New research shows how biomechanics trump bike mechanics Depending on how you feel about elliptical chain rings, a new study on them will either sound like a snipe hunt or a deep dive through cycling’s warehouse of obscure and useless novelties. The new study in question has reached profound conclusions on longstanding debates and generated new areas of study for how this magnificent mechanism we call the bicycle actually works. The short answer goes like this: Elliptical chain rings don’t do anything to help you. Nor do they do anything to hurt you. Also, it’s not that simple. The long answer...

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Sea Otter Classics: Praxis Carbon Wheels and Cranks

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Praxis recently started making some fancy new carbon bits. First with Cranks and now with complete wheelsets. Starting with the wheelset, they took a custom, 3mm offset layup and laced it to DT 350 Hubs. Well, not any old DT 350 hubs. They had custom shells made with taller flanges to support their 2X lacing patter all around, minus the radial front drive side wheel. The wheels are 32mm internal and 38mm external. One of the coolest features we noticed is the flat valve shell. Pics of it can be found below after the specs. No more slow leaking valves....

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Eurobike15: Praxis Works & Turn Cranks | Product News / Reviews

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 Link to Original Article: BikeRumour.com by Cory Benson Big news from Praxis at Eurobike were several all new Turn cranksets, and then this single ring road setup. Built off of the popular and successful hollow forged Zayante crankset, this crank is essentially a new spider developed as a result of rider feedback from those switching to single ring setups for time trials and flat road riding. This new Zayante Sprint crankset has a proprietary 4-bolt 160mm BCD that Praxis developed to maximize chainring stiffness with 48-52T rings. Developed with track cranks in mind, the new crankset combines their M30 spindle and the hollow forged...

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