>>1433932I would not do it unless you know exactly what wall thickness and metal is being used
some of the old steel frames have a top tube that becomes thin towards the center of its length
depending of frame size you can normally judge a bikes strength by its weight
if a bike feels like its less than 20lbs/10 kg treat it with care
28 lbs/13 kg and above the frames will be built thicker, beat on it a little
37 lbs/17 kg nothing short of a car is going to dent that thing
and also by how it sounds when you give the tubes a gentle tap
pig fat wall section tubes make a THUNK or very dead sound
light weight bikes ring like a bell or wind chime
