Yes, a little heavy but solid. I laced up a pair a year ago or so and sold them to an acquaintance who is still rolling them and hasn't needed a touch up with a spoke wrench.These have been holding up well for me, can't beat the price-
While I do like the wider rim, my personal experience with the relatively narrow road rims is that they work just fine. By the time I run at low enough pressure for them to "roll" on corners I'll have banged the rim on my rocky terrain enough to dent 'em up. It's definitely a YMMV thing at this point. There really wasn't much of a choice when it came to rims when I started on 29ers -- quality road rims were what we had available and they worked fine. And they still do for me...This comes from personal experience...
Yep, and the Sun CR18 is a touring bike/tandem bike rim.SunRingle has a couple. I think the Rhynolite comes in 700c.
One thing to consider then is the spacing for the rear hub. Your MTB is most definitely 135mm...your CX frame may be either 130 or 135mm and is most likely 130mm if it is a canti-only frame and doesn't also have disc mounts.I'm planning on making a wheelset for cyclocross and my mountain bike because my cross bike has canto brakes