IBOC Signature Frameset

Introducing the world's finest mountain bike and frame set. The 1991 Mongoose IBOC Signature frame set isn't for everyone — only serious competitors who demand the best. The IBOC Signature frame is handmade in a special argon chamber using only U.S. government certified titanium and aircraft-quality 4130 chromoly. The Signature's titanium main frame is specially bonded to its double-butted chromoly rear triangle for superior strength. For unequaled steering and handling response, the Signature frame features a Tange Switchblade fork constructed with a lightweight lost wax alloy crown and Tange prestige blades. At under 3 kilograms, the IBOC Signature ranks among the lightest frames available in the world. The IBOC Signature has the distinction of winning more world mountain bike championships than any other frame made.