Absolutely insanely beautiful color flip. Bike hung on bike shop wall for display. Make me an offer. The 1991 Klein Pinnacle Mountain Bike Frame is a vintage gem, featuring a 19 aluminum frame in a stunning burgundy blue fade color. This United States-made frame is designed for 26-inch wheels and is compatible with cantilever or V-brakes. With near flawless paint, this unisex adult bike offers a smooth and authentic riding experience for cycling enthusiasts once built. Whether you’re hitting the trails or just cruising around town, this Klein Pinnacle frame is sure to impress with its quality craftsmanship and classic design.