hey... welcome to ECTRR there Smiley!!! (now that it's up and running again

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Wheels are going to be a bit of an issue, everyone likes different things but honestly, if you are over 200 lbs I wouldn't be looking for a set that light. Sure there are those that will get yrs out of a light set, but then others who wont. And with SS you are putting more pressure on the wheels because you end up "mashing" a lot of the time, kinda pushing the limits of strength on a sure or ultra light set. Going for 2100 grams I think would be a much safer bet. Also you are going to want a wider rim than you will get in the ultra lights. Lower pressures in the tires, with a narrow rim, and a heavier person is going to make the tire bulge more... not a good thing for stability, traction, or the tire it's self. get at least a 28mm rim over the standard 22-24mm rim would be my suggestion.. There are many out there including my fav's the Velocity Blunts, which are very light in it their class/size. if you really want traction you can get the 35mm wide rims with Salsa's Gordo's or the P-35's. wider rims are MUCH stiffer. I lost spokes on just about every rim I've ever run... the only 2 I could ride out on have been the Blunts and the P-35's.. hell the P-35's I have now I just had a spoke strip out and didn't notice till I was cleaning it... thing rode fine and hardly warped at all.. (though it was a front wheel)
you could go with something like Stan's or American classic's but I'd get the feeling you'd be taking a roll of the dice.. if you want Pre-built I'd think about Mavic's 29er wheels, they are VERY rugged and light... but they are only 24mm wide....

get a tad heavier/stronger rim, tubeless, get reasonably light tubeless ready tires (again not super light for the same basic reasons) and you should be good
anyway... just thoughts...