To power up a mountain, you need a stiff bike frame that transfers pedaling force straight to the wheels. But zooming downhill without jolts or spills calls for more cushioning. So Kona’s Coilair bikes feature a lever that automatically shortens the shock when you pedal and lengthens it when you coast. The lever also pushes the seat closer to the ground, lowering the center of gravity to match the stability of a dedicated downhill racing bike.
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Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?