In the realm of aggressive use trail bikes, there's arguably no bike more classic than the Mojo HD. So when Ibis gave it an update, they dropped half a pound off the frame and increased the clearance to accommodate 27. 5 inch wheels. And here we have the Mojo HDR 650b XX1 complete mountain bike. With a bike this capable, it only makes sense to dress it in some of the finest components known to mankind, and this trail monster proves that Ibis agrees.The Mojo HD is already legendary, which is why Ibis chose not to mess with the geometry or the suspension on the HDR. Accordingly, you'll find the same DW Link suspension design, which relies on parallel links to generate 130mm of plush, yet firm travel. And if that sounds like a paradox, let us assure you, it isn't. Dave Weagle is a bright guy, and as the namesake and designer of the DW Link, he has a history of building some of the best performing suspension bikes on the planet. What that means for the HDR is that the suspension is designed to provide anti squat in response to rider input. So, rather than relying on elevated amounts of compression damping to provide a firm feel, the suspension design does that for you. And since that allows for a lighter compression tune, the rear wheel is free to move out of the way of impacts. The result is a bike that smoothes out the roughest trails, while remaining firm when you get on the pedals. Like its predecessor, the HDR's front and rear triangle are built of carbon fiber, and employs a process that Ibis has been steadily refining since the first Mojo hit the scene in 2005. Those refinements have enabled Ibis to shave roughly half a pound from the HD, without sacrificing any strength or stiffness. And that's important, since the HDR is intended to be rallied down the fastest, roughest trails around. You'll find the same stiff aluminum links and head tube insert, so durability won't be a concern. As before, the rear wheel is held in place by a 142x12mm Maxle quick release...