http://www.sportaid.com/
Sports wheelchairs and accessories here! Sportaid has the largest selection of everyday, sports and manual wheelchairs and accessories in the market.

http://www.unimed2.com/convertachair.htm
Provider of mobility chair. The Mobility/convertible Chair is a combination wheelchair/strecher.

http://home.wi.rr.com/birzer
The Wheelchair Racing Resource Page is a list of Internet resources relating to wheelchair racing.

http://www.americanwheelchairproducts.com/
McWhorter Distribution

http://www.wheelchairexpert.com/site4/WheelChairRacing
Wheel Chair Racing