21" (L/XL) KHS Alite 3000 hardtail mountain bike. I'm 6' and it fit me well, if you're 5'10 - 6'2 it should fit you too. Bought used in the fall, rode a handful of times at Hartland. Great bike if you're looking to get into the sport. New brakes, could use new tires and a tune. Only selling because I'm moving.