The yeti sb45 carbon 29er mountain bike 2017 is the answer for riders looking for a versatile 29er rig the sb45 frame design is optimised for 29 wheels and has a distinctly different perfonality than 29ers of old ensuring the rider feels perfectly balanced between the wheels not top heavy or lumbering the proficient switch infinity suspension platform and short chainstays make this bike feel effortless on climbs and lively and plush on descents for a bike that so clearly excels