Get the 20" ones, best of both worlds. I live in Montreal and our roads are nothing to compare to anywhere in US, absolute nightmare, plus a very harsh winter. I run 2 sets of 20" style 214 wheels, one for summer with Dunlops the other is my winter setup with Pirellis. No problem with roads or snow and 20" tires priced not out of this world like 21"s. On top of that my truck is remaped as well.
