Search results for MTB are below:

http://www.voler.com/

Our commitment to the manufacturing of premium quality cycling apparel at our Grover Beach California factory extends beyond ensuring we produce the finest product possible; it's about integrity in the way we treat our employees, customers, and the environment.. -Voler

◊ Note-> Many of their products are manufactured in the USA - but not all items on their website are manufactured in the USA. They offer the following: "Our USA made products are produced with the finest quality domestic and foreign fabrics and trims. The products we carry that are not made in our factory are clearly marked as such on our website. Please call us at 800-644-4002 if you need clarification on a specific product." -Try this link

https://rolfprima.com/

Your rides are as important to us as our own. We understand that quality and workmanship matter. By hand-building our wheels with parts that we design, test and manufacture, we can provide our customers with the consistently great experience they expect from us. -Rolf Prima

http://www.litespeed.com/

It's not just titanium. It's Litespeed Titanium. Litespeed takes the highest quality titanium available and makes it better. -Litespeed

http://sevencycles.com/

Seven Cycles manufactures high-end bicycle frames from butted and straight-gauge domestically-sourced seamless 3-2.5 titanium, filament-wound carbon fiber, and the world’s finest steels. Seven offers a wide variety of frame styles—road, touring, triathlon, criterium, track, cyclocross, mountain, suspension, and tandems—in the customer’s choice of stock or custom geometry. The company also manufactures a custom titanium stem and mountain bike handlebar, and offers an exclusive carbon fiber road fork, as well aluminum handlebars, stems, and seat posts. -Seven Cycles

Seven operates in 15,000 square feet of industrial space in Watertown, Mass. Approximately 9,000 square feet are dedicated to manufacturing -Seven Cycles

http://www.calfeedesign.com/

Genuine. Innovative. Original. In 1991, Greg LeMond was searching for a bike fast enough to keep him at the very pinnacle of professional bike racing. Craig Calfee was busy forging a quiet revolution in carbon construction. Together, they changed the face of cycling. -Calfee Design