2008 THUNDER MOUNTAIN CUSTOM KEYSTONE, With its 25-inch seat height, the low, custom appeal of this new 300 rear tire bike gives you the rideabililty you deserve! From front end to back, the length is stretched to an extreme 9-foot 2-inches long. As your speed quickens and the heads turn, the almighty 103B engine and the smooth 6-speed right side drive take you on an adventure through twists and turns. Although Harley-Davidson engines, transmissions and other original Harley-Davidson components are utilized in the production of our motorcycles, we are an independently owned and operated company. Thunder Mountain Custom Cycles, Inc. is NOT in any way affiliated with, nor supported by the Harley-Davidson Motor Company.