2021 GMC Sierra 1500 AT4 on Ion Type 143 6x139.7 20x10-19 Matte Black Wheels

This preview shows how Ion Type 143 6x139.7 20x10-19 Matte Black wheels look on a 2021 GMC Sierra 1500 AT4. Use this page to compare finish, diameter, and overall styling before buying.

Ion Type 143 6x139.7 20x10-19 Matte Black Wheels for the 2021 GMC Sierra 1500 AT4

The 20x10 –19 offset on a 2021 Sierra 1500 AT4 positions the wheel nearly flush with the fender in stock ride height, though the raised stance shown here provides additional clearance for suspension articulation and off-road travel. At this width, square 285–295 mm tire sizing is common; verify backspacing against your specific fender-roll tolerance, as a lowering setup would require fender modification or rolling. The 6x139.7 bolt pattern is correct for this truck—confirm your exact hub configuration before purchase.

The Ion Type 143 6x139.7 20x10-19 Matte Black is one of the most popular aftermarket wheel choices for the GMC Sierra 1500 AT4 platform. When shopping for 2021 GMC Sierra 1500 AT4 wheels, fitment is everything -- bolt pattern, hub bore, offset, and fender clearance all play a role in achieving the perfect stance. Our fitment specialists can help you dial in the exact specs for your 2021 GMC Sierra 1500 AT4.