Long story short, I've got a buyer on my OEM 22" wheels and have a lead on some HRE forged mono block wheels to replace them. However, the seller is not the best at replying, which is giving me pause to consider other options. One route I'm seriously thinking about is not just getting lighter wheels, but also going down to 21" to save even more on efficiency dynamics. Ultimately the 21" wheels I'd consider aren't forged (flow formed instead) but they are equally as light. Meaning lighter plus smaller equals greater benefits, too. Tire Rack lists some tire sizes for 21 and they happen to be the same Pirelli Verde tires I'm running now. So overall I'm sure I'd be happy with the tire performance-- but I'd love to know if any other MX owners have gone this route. Tire options are pretty much non existent in 21" other than the Pirelli Verde all-season or snow-- but that is okay with me. Anyone?!