The United States has what's called Magnuson–Moss Warranty Act. In a nutshell the law protects customers for similar situations. The issue has to be proven to be directly caused by the modification or if it is an actual warrenty tied part the manufacture must meet their obligations. To be honest it doesn't always workout fairly and wheel spacers due in fact put more stress on the wheel bearings in 99% of the situations. Its gonna be a crapshoot for US Warranty's too. I USUALLY keeps things stock until the warranty runs out anyways to just reduce the possible hassle.
Maybe Canada has something similar to the Magnuson-Moss act?
Orange 17 Teryx4 LE, 4.5k winch, Full windshield, Roof, quadboss front rack, full size front spare tire/wheel