Refers to a type/sub-brand of mountain bike.
The Stumpjumper was one of the earliest bona fide production mountain bikes รขยย- a fact Specialized is trumpeting as the Stumpjumper turns 25 years old in 2006. The first two mass produced mountain bikes were sold in 1982: the Specialized Stumpjumper and Univega Alpina Pro. The word is actually "stumpjumper" instead of "stump jumper."
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