well ive seen 1 1/8" holes done on a dx32, and the snow cats are massive. they might be a problem for setting up brakes. also they might be weaker, since theyre so wide they might be easier to flatspot than other rims. also, from the pics below, they seem to be single walled too. but for 25 dollars, i guess it cant hurt to try them. just make sure your brakes will still have room to be set up.
1 1/8" holes on dx32:
snow cat:
a TON of info on snowcat rims:
http://www.enteract.com/~icebike/Equipment/rims.htm
1 1/8" holes on dx32:

snow cat:

a TON of info on snowcat rims:
http://www.enteract.com/~icebike/Equipment/rims.htm