Originally Posted by
Duragrouch
I recognize the black Cannondale 3.0 Crit, somewhere around '89-'92?
It's an '89; started life as an R500, I repainted it in Kameleon green/purple, fitted a 2x10 drivetrain and 320tpi cotton racing clinchers. It wants "Full Gas" all the time now.
Originally Posted by
Duragrouch
Hanging bikes from vertical hooks, is not the same as using hooks from the side as pictured, which can increase hook and rim loading, in the same way that levering a nail out with a hammer claw, can exert far more pulling force than hooking with the claw and then pulling straight up; The latter will never pull the nail
Yes and No; Yes, in that you are side-loading the hook, but that side-load is only ~20* off angle , but No, in that WRT hanging up a bike, the net force in the whole system is only equal to the weight of the bike. In a "dead hang", all of the force is on a single point on the wheel, and the whole thing is in tension. In a wall mount, the bikes' wheels are "pushing" against the wall, and the hook is keeping the bike from falling away from the wall as much as supporting its weight. Same net total of forces, just split up in a couple different directions.
Id have to pull out my old Statics notebook to get you an actual breakdown, though.
The nail-pulling example also brings biomechanics and levers into the equation, which increases the variation in the amount of force you can apply to a given point in the model. Unless you're putting the bike on the hook and then hanging from the handlebars, that just muddies the water.
I stand by my original statement though, that the anecdotes of damaging bikes by hanging them is because they were hung with the hooks against/around the spokes, and loaded or unloaded by trying to pull the bike "down" off the hook, rather than lifting it clear of the hanger, then bringing it down. I will agree though, that a wall mounted hook takes a bit more care, both in setup and in use, than a single ceiling hook.