We'd like to issue you an official invitation to join the ranks of 29ers on Niners, but, since you're already here, chances are good that you've either already been invited or are a returning member of the big hoop crew. Our own personal understanding of 29ers is that they're a fastclass sandwich, and the RIP 9 Carbon Mountain Bike Frame's race oriented geometry, strategic blend of materials, and CVA suspension make it the classiest, fastest model on the market that won't cost you a second mortgage. The main triangle of the RIP Carbon is carbon. Which shouldn't come as a surprise. Compared to the all alloy RIP, the Carbon model reduces weight without compromising efficiency. It also looks sharp after a hosing off, with weld free joints that transition cleanly between tubes and junctures. The links are also carbon, but the rest of the Carbon 9's back end sticks with the proven aluminum. With all the articulation involved in a full suspension back end, stiffness can become an issue, and a flexible setup can lead to inefficient travel and a shorter life for the suspension system. Niner's choice to stick with alloy here has one primary benefit: it maintains all the stiff, lightweight properties of the frame's main triangle but at a much lower cost than carbon. Carbon is capable of handling the stresses of a complicated rear suspension, but the design and materials that go into it add an unfortunate price bump. For those looking for a full carbon machine, the RDO model provides that option. The Carbon model, on the other hand, is for those who want the ride quality and don't mind missing out on bling. We feel it's important to stress that this frame's on trail feel is virtually identical to the RDO's. It's got the same proven geometry, removable ISCG05 chain guide mount, direct mount front derailleur interface, 142mm rear spacing, and titanium frame guards, so you're not missing out on any of the big ticket items or little tricks that make the RIP series such a be...