A Shop Built On Speed

aCOS Gravity is Idaho Springs Colorado’s fastest bike shop! We strive to offer the best customer service that you can find among internet retailers. Set up in Idaho Springs just off I70, we’re right on the way to Winterpark, Aspen, Breckenridge, & Keystone. Everything you need, right on your way. Our staff has expertise in both road and mountain bikes gained through many years of riding, servicing and racing in the deserts and mountains of Colorado and around the world.

aCOS-G strongly supports gravity racing by sponsoring a downhill race team and regional riders throughout the country. If you would like us to sponsor a race, please Contact US and we can get it set up.

Shop Hours

  • Wed-Sat: 9-6pm
  • Sun: 9-5pm
  • Call Us: 720.410.2100
Downtown Idaho Springs

Reviving an old Classic

Jiggies Cafe in Idaho Springs had been a landmark business for years. So when it closed, we jumped at the chance to take over the historic building and make it our own. From its unique place right on the river to the old-school bar & bar stools, the cafe has provided an amazing space for bikes.

Stop by and see us on your way to the bike parks.

Front of the new shop


Our vast knowledge of suspension mountain bikes and components comes from our racing experience, which provides the best testing grounds for the products that we stock, sell, and recommend. When you spend your money with aCOS-G, you can expect fast, knowledgeable service on quality products, and know that the money you spend is going to support and grow the culture of riding and racing mountain bikes. aCOS-G only stocks products that we ride or race. Our history of product testing has created very close relationships with product manufacturers and their employees, allowing our customers to get priority treatment in service. If you are looking for an item that is not in our shop, we will be happy to order it for you. Give us a call or send us an e-mail. We will let you know if it’s something we can order and how long it will take to arrive.