Switch Infinity suspension technology allows Yeti to eek more quality travel out of our suspension than other designs. As a result, the SB4.5 is not easily categorized until you ride it. It's a bit of a chameleon - it'll be whatever you want it to be. The Yeti crew has raced it in seven-day epics, shredded it on high-alpine lines and it's the go-to recommendation for someone who wants a versatile bike with big wheels. The SB4.5 is light and makes climbing feel effortless, yet takes on descents like a mini monster truck.