 A customized version of the Specialized Rockhopper mountain bike is currently used by the London Ambulance Service to equip their Cycle Response Units which operate in congested areas of the city.In 1990, Specialized tried to sue RockShox Inc, claiming the company's name too closely resembled the bicycle model name "Rockhopper" The case was ultimately dismissed with prejudice.In 2006, Specialized sued Mountain Cycle over its use of the model name "Stumptown" (nickname for Portland), alleging it resembled the Specialized model name Stumpjumper.