lol
what's weak about them?
Comp guys are running 40 spline 9" axles all the time and having good results with little breakage. It all depends on price.
They are far from weak.
Donno that I would run 49" tires on one. But hell, even the 2.5 ton junk is not holding up to tires that big (shafts, ring and pinions etc..).
Rockwells are cool because they are fairly good when it comes to strength and cost.
kinda like a 14 bolt. $100 gets you to 44" tires easily.
Mace is definetly correct on this Rocks are nice because they are a dime a dozen in stock form and you can throw a 42 or a 44 at them and driven with a little sense they dont break.