I'm using 0 offset rims with buggy hubs (no extension) and I like it a lot. I ran the new ProLine Holeshot LPR's for the indoor season. I'm going to try the Crime Fighter LPR's for the summer. Here's a pic, but with my old 1/2 offset rims AND the hub extenders. It was as wide as it was long back then:
I wish I could measure it for you. Right now, Dan, at
RC Product Designs is measuring my 5T for his new electric conversion kit. The bad thing about this is that I don't have it. The good thing is that I get a free kit out of the deal for letting him borrow it.
If your DAce hubs line up with the end of the axle, there is no extension. Post or send a pic if you're not sure.