The legendary Crest is even better for 2017. Wider and even lower profile, the new Crest MK3 sheds weight for faster acceleration and climbing. WideRight 23mm internal width increases tire volume for improved stability with wider tires. Inspired by our carbon technology, the entirely new rim shape adds strength and virtually eliminates the chance of a tire pinch flat. Refined over the past 15 years, our Bead Socket Technology offers the most trusted tubeless seal in the business, making the Crest MK3 the best choice for lightweight, tubeless XC performance.