Prowheelbuilder.com Mar 20, 2009 Categories: MASH Frames 0 Comment Wanting to say thanks again to the guys at Prowheelbuilder.com They loaned us flip-flop rear wheels for the Tour of California trip. In the end we learned how each piece of gear we used on the trip played an important roll, and these wheels were life savers. They will be selling these used rear 700c clinchers at a good price, so check out what they offer, and pick up a slightly used rear, used 1 week, only 750 miles!