The TrailBlazer is further unfriendly to people wishing to do a lift or increase the tire size. The first obstacle is the positioning of the upper ball joint that is located on the steering knuckle, above the tire (see the picture below). This severely inhibits a larger tire size unless you install wheel hub spacers (pictured to the right) or purchase wheels with a backspacing of less than 4. I purchased wheel spacers from WheelAdapter.com after the recommendation from fellow TrailVoy members.
If you wish, a wheel spacer can also act as an adapter to change the lug pattern to match a new wheel. I requested four 1.5″ hub and wheel-centric billet aluminum spacers. Fred (the owner of Wheel Adapter) knew all of the necessary dimensions and shipped them out the next day.
If you are planning to use the stock bolt pattern, remember, it is NOT 6×5.5″, as most Chevy trucks are. Our stock lug pattern is 6×5″, or 6x127mm.