Handcrafted steel and bronze mountain bikes made in Anacortes, WA, USA.

Framebuilder Kevin Foss has had a lifetime love of riding bikes. He spent thousands of hours guiding and coaching others before embarking on the journey to make frames that fit him and the way he wants to ride. Rosario Bike Co was formed in 2021 out of the belief that there’s a place in mountain biking for the custom shaper who has knowledge of regional riding, a personal investment in the local community, and the ability to guide riders to the geo, components, and setup that fits them and the trails they ride. Whether your rides are backyard escapes, racing and pushing your limits, or exploring the world by bike, Rosario Bike Co. exists to help you get the most out of your riding.