Shimano XTR FD-M900 28.6mm Bottom Pull Front Derailleur. Shimano XTR FD-M900 28.6mm Bottom Pull Front Derailleur. Two available, both from the spares box of Sian and Dafydd Roberts, former pro mountain bikers, and along with Dafydd Davies, the founders of Coed y Brenin. There will be other items available in time, including a Marin Team Titanium, and various former race bikes. I'm selling other items too, but it'll be clearly stated which items are theirs, and the money goes to them.