What's the biggest size wheel I can put on my 2016 Equinox without doing any upgrades to brakes etc. ?

Call them and ask for Scott...great establishment

Yeah give them a call because there are alot of things that go into rims & tires. I recently had to educate myself so i could put new rims on my 2016 chevy trax LTZ and these guys were so great! They helped me find beautiful rims for my baby! Good luck. Im interested in seeing the Equinox with nice rims

Give them a call