Yeah.. But thats with like full titanium bolts and nobbles cut off tyres, monty/try all everything lol . I'd say between 9-11 is the best weight, unless your a pussssssy hah.
Like I said in that other topic, I've had 2 and stretched both springs, never had a problem, I had them both about a year each. Aslong as you keep them clean they'll be as good as new.