my dealership said they dont recommend anything bigger than 20"s on a h3 ....anyone out there with bigger did your ride and handling change also what do you think 20"s or 22"s

 

I ran 22s on MY 07 Hummer H3 BUT I also used a 1 inch spacer on ALL four tires So they stuck out past the fenders about an inch and they rode AWESOME and Handled like a dream....I rode these 22s for about 800 miles and removed them and Re-Installed my STOCK rims and tires So i am Now selling My 22s Rims And tires,,,But thback to YOUR question,,,,Mine rode AWESOME and handled Beautiful,,Just got tires of slinging water down the side of my truck due to the spacers