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@badtmy
nah cos if you lock the wheel (which usually happens mid-bunny hop in a skid) the forward momentum of your body weight + bike is actually just being slowed by the tyre skidding over the road (ie friction between tyre and road), and the actual force applied to the rear triangle by your feet is bugger all (it's static).
i don't reckon there's actually that much force going through the rear triangle, cos the deceleration of the rear wheel is happening under very little load (it happens mid-air when you bunny-hop the rear wheel) as your body weight is not involved at that point.
am i barking up the wrong tree? does anyone have any actual force measurements from anywhere?