Don't do
it. It'll punch a nice dent in your chainstays... Btw I was totally unable to remove the lock ring on my Urbane wheel. I have a crappy MEC tool though.
My lockring was really really hard to take off as well and it also came from Urbane. Took me about half an hour of cranking, banging on the lockring tool, or torquing my entire weight over the lockring tool. It comes off, it's just really ****ing tight. Not at all complaining though, stuff like that is supposed to be tight.
If you have a crazy amount of trouble you can just put a pipe over the gripping area of the lockring tool so you have a longer handle. More torque would make it easier to get it off