Six5 has nailed it on everything so far, this will be no exception. Even though Walsh is at the for front of this already, it is still cool! To answer 1986s' question, the Ltr geometry is said to be the best, there are several companies making 450r arms using Ltr geo with Ltr spindles, hubs, rotor as well as Ltr geo stems. Walsh also makes hybrid frames (crf) to use this style setup. Also has rear end options of 450r link style or Savior (basically crf450 link). Lsr has their own style spindles(Ltr geo) that uses trx hubs and brakes with High Missalign tie rods for Trx design stems. Although its a cheaper solution, its said to not handle as well, but still better than 450r