Upgraded from my Blur XC Carbon to 29" wheels. I LOVE the Tallboy. I'm actually quite surprised how much I prefer it over the Blur. It's light, it's stiff and it's fast. The latest frames have a 142mm rear axle which makes things stiff, but check with customer service so you know what you're getting and you get the right rear wheel. I'm running mine with a 156 Q-factor crank, which seems to be now approved by Santa Cruz in the latest revision,.