Have rimguard and kicked myself after getting it done. (Kicked myself for waiting 8 years before getting it done!!) As stated, no strain on axels since weight is all pushing on the inside of the tire in the direction of the ground. No rim damage, non toxic if it leaks. It was fairly cheap (I think $200 for 11.2 24's?). I would also consider washer fluid though the rimguard is a little heavier. (11lbs per gal vs maybe 8 for washer fluid)