Local bike shop bike shops have begun themselves to sell products online. A recent development is the introduction of brand specific stores from bicycle manufacturers such as Trek Bicycle Corporation. Other manufacturers, such as Specialized are strengthening their channels with "concept stores". According to the National Bicycle Dealers Association, in 2007 there were approximately 4,400 "specialty bicycle retailers" in the USA; down from 4,800 in 2005. Although they sold only 17% of the bikes, up from 16% in 2005, they collected 49% of the dollars, up from 47% in 2005. In 2004, the average specialty bicycle retailer had gross sales of $550,000 per
Trek Bicycle Corporation Void" and refers to Trek's proprietary process for creating carbon structures that exceed aerospace standards. Weighing only , the 5500 frame was the world's lightest production road frame. To make room for its new OCLV manufacturing facility, Trek expanded its Waterloo headquarters again to a total of . 1992 marked another first for Trek: its first full suspension mountain bike, the 9000-series, which featured Trek's T3C (travel is three times compression) suspension system. In 1993 Trek introduced its first OCLV Carbon mountain bike frames, the 9800 and the 9900, which at was the world's lightest production mountain bike frame. In