I have a Shimano WH-R560 wheelset. The rear rim has cracked on my twice. The first time, the shop had it replaced under warranty. The second time, its out of warranty. Basically, I am too heavy for this wheelset. I want to see about buying a replacement rim and then selling the whole wheelset on ebay. I don't know if its a viable proposition until I can check rim prices.
Can someone recommend an online spot to purchase just the Shimano Rim?