This is a complete system with an extra (2 total) mounting kits so it can be run on two bikes. Bought this winter from Excel Sports as a built wheel system, 32H Mavic Open Pro Clincher for about $1260, plus about $70 for the extra mounting kit. Everything works perfectly - am selling to plow the $$ back into a disc wheel, which I need more. Includes a built wheel with SL hub, the two mounting kits, Power Tap Software, 2 manuals, the zip up case - the complete system is intact. Total mileage on the system is 474. I spent about $1350 on it and would like to get $850, shipped.