Sonder Transmitter Carbon. I recently build one up with a 120 34 stepcast 29 fork, its a mullet bike with a 2.8 27 plus in the rear. I built a small with a 35mm stem and at 5.5" I feel its still a bit long. I am selling the frame, it has 160 ish miles on it, its actually too slack for me. For a hardtail I have found my sweet spot is 68 degrees, my trails are pretty flat.