Richard Sheppard is six foot, six inches tall and weighs in at 289 pounds on a good day, so as one may expect, there are not many dual-suspension trailbikes out there that can either fit him, or that can manage to perform well enough to make him happy.
http://www.pinkbike.com/news/did-you-see-that-ram-bikes-urt-chassis-and-quadrilateral-fork-sea-otter-2015.html