My 20/24 wheelset with Soul Kozak hubs and XR-200 rims has held up pretty well. Depending on your weight, I’d suggest a higher spoke count (or a beefier rim, such as the XR-270). 20/28 is not a bad option for most folks, and I’d highly recommend 24/28 for anyone over 170 lbs. We only currently have a single 28 hole hub in stock with a Campy freehub body. If you need a Shimano freehub, give us a call. We can easily swap it out.