weight ratio

Bike Like an Egyptian

Tiny pyramids make for the toughest mountain-bike frame yet

If a simple polygon can hold up a pharaoh's tomb for 4,500 years, it should survive some off-road riding. That's the thinking behind the 2.75-pound Arantix mountain-bike frame from Delta 7 Sports. It's 10 times as strong as a steel frame of the same weight would be—enough to survive the company's informal "run- over" test with a Ford F350 pickup.
bike_485: Photo by Greg Neumaier

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