PRO Koryak 31. 8 Stem A Robust Stem When you're riding treacherous terrain, the last thing you want to worry about is your components. The PRO Koryak 31. 8 Stem is an extremely durable stem that is made from lightweight and durable 6061 aluminum. It features a 31. 8mm clamp that ensures absolute control and vibration dampening. It is available in several lengths and has a 0-degree rise. Features6061 aluminum construction that is lightweight and durable Available in different lengths with a 0-degree rise Designed for trail and all-mountain biking SPECIFICATIONSLength35, 40, 50, 60mm Rise0-Degree Bar Clamp Diameter31. 8mm Stack-Material6061 Aluminum Intended Use All-Mountain, Enduro Weight N/A | Pro | Koryak 31. 8 Stem 35Mm | Aluminum