 At its peak , around 250 people worked at the Chehalis plant , but operation gradually moved to the main Trek factory in Wisconsin . In 2001 , a workforce of around 70 people produced 15 @,@ 000 to 20 @,@ 000 frames a year . In 2002 , all production moved to the Trek headquarters at Waterloo , Wisconsin . Bikes were still sold under the Klein name until around 2009 in Japan , but widespread distribution ceased circa 2007 in the United States . 
