I picked up some free super swampers(22x12x9) that I would like to put on my 250es(I tried my friend's 22 inch swampers and it ran fine with them even though it is supposed to have 25). The problem is they are dry rotted a bit and probably wouldn't hold air, but the tread and bead looks great. My problem is I'm thinking the valve stems will break off(they will be the steel ones, though) because of it being on the driving wheels... But I like to run alot of air(6+ psi) and ride mostly loose terrain, will they work or be useless?