No doubt, the speedo will be off a fuzz on the fast side, so keep that in mind if you cruise ~5 over the speed limit, it'll really translate to around 7 over. I'm on 16's and it really makes things strange. If you ask me, honestly if you're going to spend the money on new wheels, why not just get something that looks like the stock wheel but wider? Yeah I understand going a little bigger is cool, but that wimpy 5.5? inch wheel doesn't do much justice. I'd bet money that you could find a wheel that looks similar to the stockers that would wider, have a more appropriate offset, and could accommodate a tire that would be cheaper to run then the goofy one chevy advises us to use. That's just my 2 cents.