Going up hills

You guys are confusing "degrees" (360 degrees in a circle), with percent climbs. A 20 percent climb is a doozy, but it is nowhere near 20 degrees. A 100% climb would be 45 degrees; a 50% climb would be 22.5 degrees; a 25% climb would be 11.25 degrees.

Percent gradiants are simple run vs. rise. A one foot ascention over a 100 ft run would be a one percent grade.

Long mountain climbs are usually grades of 5 to 10 percent. Steep hills that make bicycling tough are usually 7 to maybe 20%. Anything over 20 percent is tough going for any cyclist and you will probably have to out of your way to find them. A 37 percent climb of any length would be a serious challenge for any cyclist!
 
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