The Chevrolet Trailblazer has a bolt pattern of 6x127. This means that it has six lug nuts with a diameter of 127mm. When selecting wheels for a Trailblazer, it's important to make sure that the wheels have the correct bolt pattern to ensure proper fitment and safe operation of the vehicle. In addition to the bolt pattern, it's also important to consider other factors. These factors include the wheel size, offset, and backspacing when selecting new wheels for a Trailblazer. The factory wheels on the Trailblazer are typically 16, 17, or 18 inches in diameter. For all the offroad enthusiasts out there, it is possible to install larger wheels with the proper offset and backspacing. It's recommended to consult with a reputable wheel dealer or installer who can help you select wheels that are compatible with your Trailblazer's specifications. They will also help meet your style and performance preferences.