Rims have changed for the stupid. The way it used to work was you could have really light rims, that felt so called lively, you had to use enough spokes, and you had to crank up the tension to near collapse. And the limiting factor was that without double eyelets they were likely to break. Today, those rims are gone. Even ones sharing the same numbers and having double eyelets, normally have fatter sections. The new profiles are stiffer therefore they need less spokes or less spoke tension to make sound wheels. When I have checked on wheel tensions for these rims, the numbers coming back are always fairly modest. I still have a pair of MA2s in 26" with 36 holes. Problem is, I can't come up with a worthy enough use. Occasionally they show up on ebay. I bought mine from Nashbar for nothing, I wish I had known enough to buy them all. The were made up for Bontrager, and were an attempt at something better than those railway track sections early mountain bikes were equipped with. They were designed for 2.1" tires, and those rims are really narrow, like 20mm. I run Aeroheat, or Alex DH series. Downhill rims are normally a pretty good fit. The DHs I am familiar with ae DH20 are these the new version, DH19? Alexrims - cycling wheels