Crank shape?
07-11-12, 06:42 AM
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Crank shape?
I ride a 80's Schwinn Super Le Tour and the cranks are straight. I notice that newer cranks have a curve in them. Is there a reason for this? Does it provide for more clearance for the ankle bone?
07-11-12, 07:09 AM
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It might, but that's not the reason. Over the years crank sets and BB's have moved to progressively shorter spindles to improve stiffness. That moved the hub (spindle end) of the crank inboard. But the pedals had to stay roughly the same width apart to clear chainrings and chainstays, so you have today's curved arms.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
