GarageCalc Where 8x165.1 is used
8x165.1 appears on 13 vehicles from 5 makes in this list: Chevrolet accounts for 5, GMC for 4 and Ram for 2. The earliest fitment here is the Ford F-250 / F-350 from 1973, and 3 of the 13 are still built with this pattern today.
What else has to match
A matching bolt pattern is the first of four checks, not the last. The wheel's center bore has to match the hub, or be bridged with a hub-centric ring, so the hub carries the wheel instead of the studs. The offset decides whether the tire clears the suspension and stays inside the fender; run the numbers in the wheel offset calculator before buying. And the lug seats must match the wheel: conical, ball or flat seats are not interchangeable even when the thread is. None of those values are fixed by 8x165.1 itself, so check them per vehicle.
Frequently asked questions
What is 8x165.1 in inches?
8x165.1 is 8x6.5 in inches: 8 lugs on a 6.5 inch circle (165.1 mm divided by 25.4). It is the same pattern in different units, and 8x6.5 is how US wheel listings usually label it.
What cars have an 8x165.1 bolt pattern?
Chevrolet Silverado 2500HD / 3500HD (2001-2010), GMC Sierra 2500HD / 3500HD (2001-2010), Ram 2500 (1994+), Ram 3500 (1994-2002), Chevrolet C/K 2500 / 3500 (1988-2000), GMC C/K 2500 / 3500 (1988-2000), Chevrolet Suburban 2500 (1992-2010), GMC Yukon XL 2500 (2000-2010), Chevrolet Avalanche 2500 (2002-2006), Chevrolet Express 2500 / 3500 (1996+), GMC Savana 2500 / 3500 (1996+), Hummer H2 (2003-2009), and 1 more in the table on this page. Always confirm on your own vehicle: the pattern can change between generations, trims and markets.
Is 8x165.1 the same as 8x170?
No. 8x170 is 4.9 mm larger in diameter. That is enough to seat every lug off-center, so the wheel is held by the lug hardware rather than by matching geometry and can work loose. Fit only wheels that are exactly 8x165.1, or hub-centric wheels with wobble bolts made for that specific mismatch.