Frame geometry - Size is a Medium. BB dimension will drop 9 or 10mm due to the wheel/tire size difference from original spec. The 160mm 27.5 Fox 36 Talas RC2 fork has about the same A2C as the 140mm 29 Fox 34 original spec fork. Chainstay is only 3mm longer than my current 27.5 frame. Plan is to slacken the headset 2 deg for 64.5 deg HTA in the 160mm fork length, but mostly use the 120mm fork length and lower HTA for local trails. The terrain around here is not so severe.