If you are thinking of installing a wide tire kit, here's a few sites to help out.
Wide Tire Kits
Softail - Wide Tire Softail Kit Frame
Wide Rear Swiingarm Kits for Motorcycles
Wide Tire Kits and Conversions at Chubbys Choppers
Harley-Davidson | Accessories And Apparel | Genuine Motor Accessories
New Big Boar Softail Wide Tire Kit
Softail Wide Swing Arm Kits, TTC Motorcycle Parts
http://www.sturgisswapmeet.com/options.cfm?prodid=737
Santee Wide
Wide Tire Kits
Softail - Wide Tire Softail Kit Frame
Wide Rear Swiingarm Kits for Motorcycles
Wide Tire Kits and Conversions at Chubbys Choppers
Harley-Davidson | Accessories And Apparel | Genuine Motor Accessories
New Big Boar Softail Wide Tire Kit
Softail Wide Swing Arm Kits, TTC Motorcycle Parts
http://www.sturgisswapmeet.com/options.cfm?prodid=737
Santee Wide