Gamut USA. Based in San Jose, California, Gamut USA offers high-end chain devices to serve all relevant disciplines within mountain biking: Downhill / Freeride Urban / Street Four Cross / Slalom Gamut USA's goal is to offer the world's lightest, most intuitive, and easiest to install complete system chain devices. Current World DH champion Greg Minnaar and Irish national champ Ben Reid are just two of the many pro level riders that Gamut supports. Gamut also provides OEM products to well respected manufacturers such as Specialized and Santa Cruz, as well as many others.