Well I finally got a hold of one of these so I thought I would give you my impressions. First of all it takes extra long Schrader valve stems. Regular tubes are not long enough to even screw on an extension. This is a deal killer for me and I donated it to the BICI coop in Birmingham Al if some one wants it. Second of all the rim is anodized. I have photos of around 10 cracked rimes on flickr under the name zerodish. The mars rover has suffered damage to it's wheels because of this. NASA generally does not make these kind of idiot mistakes so I don't expect the general public to know it either. I generally pick out rims that can take my weight of 200 pounds unbuilt in a wheel. The Araya VP20 and the Weinman 519 can do this. I have never had a failure of these rims. I recommend this as a standard where each brand of rim is tested to what weight it can withstand without deformation. I think some one should copy the old Sun Rhyno which survived a cross country trip on a touring loaded quad as the standard heavy duty rim. There should cost around $30 new.