It takes careful engineering to offer a limited lifetime warranty on a model intended to be ridden hard. With proper testing, you learn where to add gussets and what kind of weld pattern works and what doesn't. You learn what gauge tubing survives and what ends up in the dumpster. Which is great - but all that durability is wasted effort if the rest of the design lacks. Gary has done his homework and gotten the geometry right. It's got short chainstays, for ease of weighting the rear wheel for manualing or setting trajectory off jumps. It's got a neutral geometry that makes it extremely versatile. Bigg'ns does everything well - especially going Big.