Join Date: Jul 2009
Location: Province of Ontario, Canada
Physics says this is impossible!
If the cover formed a perfect sail, that is it cupped or formed a perfectly flat surface the wind could not roll off of, instead forming to the shape of the bike it was pressed against, it would generate 2.3pounds / square foot at 30mph and most of this would be applied low on the bike where it has less leverage. Try pressing on the vertical mid point (top of engine block) hard enough to lift the bike off the kickstand. Most of you will not be strong enough to do this. Since the bike is leaned, the sail effect of a cover becomes even further reduced. It's like the slope of a windshield. Physics says a 30-40mph wind will not cause a bike to tip over even if it has a cover and the wind hits directly in the side. If it is sheltered between cars the force of the wind will be orders of magnitude less. A bike without a cover only projects a minuscule few square feet of area the wind cannot pass through.
My guess is people are confusing the propensity for the kickstand to sink in soft earth or hot asphalt with wind loading. The kickstand foot has ~150lb of weight on it, pressed on a foot that only has an area of 1sq inch. If your bike is falling over put a piece of wood or something else under the kickstand to spread the weight over a larger area.
Last edited by twowheels; 04-10-2017 at 05:05 PM.