Mountain Biking

Airbomb.com
Offers mountain bikes and components through an on-line store.
http://www.airbomb.com/

BeyondBikes.com
Specializing in bikes, clothing, parts, and accessories. Offers both major and smaller brands. Also includes road cycling equipment.
http://www.beyondbikes.com/

1Bike
Offers Mongoose mountain and BMX bikes and frames. Auction information, wallpaper images, and a cycling link directory.
http://1bike.com/

The Bike Outlet
Includes closeout mountain bikes, bmx bikes, and racks. Offers major brands, including Mongoose, Redline, and Thule.
http://www.thebikeoutlet.com

Bike Stop
Puerto Rico based shop offers a variety of bikes and accessories.
http://www.bikestop-pr.com

Cactus Bike
Phoenix, Arizona shop specializing in mountain, downhill freeried and single speed.
http://www.cactusbike.com

DirtWorld.com
Includes books, clothing, bicycles, and accessories.
http://www.dirtworld.com/

Extreme Steering
Specializes in components for mountain bikes, including steering stabilizers and silicone grips. Store, product information, customer reviews, and race information.
http://www.extremesteering.com

Mountain Bike Store
Includes Jeep full suspension, hardtail, and youth models as well as general outdoors equipment.
http://mountain-bikes-now.com

North Shore Cycles
Specializes in mountain bikes and accessories; also offers road and bmx bikes.
http://www.nscycles.com

Rocky Point Cycle
Bike shop located in Rocky Point, New York specializes in mountain bikes, accessories, and repairs. Product catalog and trail information.
http://www.rockypointcycles.com

Silverfish-UK
Components and clothing from Race Face and Arrow.
http://www.silverfish-uk.com/

Simon's Bike Shop
Mountain bicycles, frames, parts, clothing, and accessories.
http://www.simonsbikeshop.com/

Used Bikes Online
Specializes in used high-end mountain and road bikes.
http://www.usedbikesonline.com

Web Mountain Bike
Sells accessories, tires, pumps, saddles, and mountain bikes, Includes tips on maintenance and repair.
http://www.webmountainbike.com/