8-Lug Wheel Interchange: 8x165.1 vs 8x170 vs 8x180 on Ram, Ford and GM Trucks

8-lug wheel interchange between Ram, Ford and GM heavy-duty trucks does not work: Ram uses an 8x165.1 bolt pattern, Ford Super Duty uses 8x170, and GM heavy-duty trucks use 8x180 from the 2011 model year. The three bolt circles are only 4.9 mm to 14.9 mm apart, so they look alike, but a wheel drilled for one will not seat correctly on another.

The one real exception is older GM: heavy-duty Chevrolet and GMC trucks through the 2010 model year share Ram's 8x165.1 bolt circle, but a matching pattern still does not make a wheel interchangeable. This guide shows the numbers side by side, then walks through the center bore and lug thread checks that decide whether an 8-lug wheel interchange is safe. For model-by-model specs, see our fitment pages for Ram Heavy Duty, Ford Super Duty and GMC Sierra HD; the tables here only quote them.

Key facts: 8-lug heavy-duty wheel specs at a glance

• Bolt circles: Ram heavy-duty trucks use 8x165.1, Ford Super Duty uses 8x170 and GM heavy-duty trucks from the 2011 model year use 8x180, so the circles are 4.9 mm (165.1 vs 170), 10 mm (170 vs 180) and 14.9 mm (165.1 vs 180) apart and none of the three swaps with another. Sources: our open fitment dataset, Wheel-Sizes data for the F-250 and the Performance Plus Tire guide to 8-lug patterns.
• Older GM trucks: Chevrolet and GMC heavy-duty trucks through the 2010 model year share Ram's 8x165.1 bolt circle, but the two brands' hub bores are reported differently, so a matching pattern alone does not make the wheels interchangeable. Sources: Performance Plus Tire and Wheel-Sizes data for the Ram 2500.
• Lug thread: Ford Super Duty studs are M14x2.0, while Ram and GM heavy-duty studs are M14x1.5, so even the lug nuts cannot be shared between Ford and the other two. Sources: Wheel-Sizes data for the F-250 and Ram 2500, and our fitment database.

8-lug wheel interchange: the three patterns side by side

Ram, Ford and GM each settled on a different 8-lug bolt circle for their single-rear-wheel heavy-duty pickups. The table below lists the pattern, hub bore and stud thread for each; the 4.9 mm to 14.9 mm gap between them is why a casual measurement can mistake one for another.

We list the older GM bore as "check the hub" on purpose. The sources we compared disagree on it, and we only publish a bore when two sources match. The Ram bore of 121.3 mm comes from our database and the Performance Plus Tire guide, while one aggregator lists 120.9 mm, so confirm it on the hub if you are boring a custom wheel. Our 8x165.1 page, 8x170 page and 8x180 page list every vehicle in our database for each pattern.

Why a 5 to 15 mm gap is a real mismatch

Bolt circle is a diameter, so a mismatch pushes each hole off its stud by half the gap. With eight lugs, every stud is off in a different direction, and the wheel cannot center itself on the studs.

The gap is half the difference between the two bolt circles, so these are straight arithmetic, not estimates. A near-miss wheel may still thread on, but one wheel guide warns it can fail to center or to stay tight under load, which is why we never recommend forcing a close pattern.

Ram heavy-duty wheels: 8x165.1

Ram heavy-duty trucks use an 8x165.1 bolt pattern, which is 8x6.5 inches, with a 121.3 mm center bore and M14x1.5 studs in our database. Our Ram Heavy Duty fitment page covers 2013 to 2025, and the older Dodge Ram Heavy Duty entries in our database share the same pattern and bore.

For 8-lug wheel interchange, Ram's 8x165.1 circle is the smallest of the three, so a Ram wheel will not clear the studs of a Ford or a 2011-and-later GM truck. Ram's pattern is shared with older GM trucks, but the hub bores are reported differently, so measure the bore before moving a wheel between the two.

Ford Super Duty wheels: 8x170

Ford Super Duty single-rear-wheel trucks use an 8x170 bolt pattern with a 124.9 mm center bore. Its studs are M14x2.0, the only 2.0 mm pitch of the three, so Ford lug nuts do not carry over to Ram or GM trucks. The 8x170 page lists the Ford models in our database.

Ford's pattern sits 10 mm below GM's 8x180, and that 10 mm gap is the pairing most easily missed by eye in any 8-lug wheel interchange. One guide to heavy-duty patterns states plainly that 8x170 and 8x180 are not interchangeable and that there is no safe way to make one fit the other.

GM heavy-duty wheels: the 2011 change from 8x165.1 to 8x180

GM heavy-duty pickups changed bolt pattern with the 2011 model year: Chevrolet Silverado HD and GMC Sierra HD trucks through 2010 use 8x165.1, and those from 2011 on use 8x180 with a 124.1 mm center bore and M14x1.5 studs. A wheel from a 2010 truck therefore does not fit a 2011 truck, even though both are "Silverado 2500HD."

Our GMC Sierra HD page and Chevrolet Silverado HD page list the 8x180 trucks by year, and the factory wheels on the GMC page are 18 to 20 inches. If you are moving from a 2010 truck to a newer one, expect to replace the wheels, because 8-lug wheel interchange between those years does not work.

Rear axles matter too. This guide covers single-rear-wheel pickups, and dually trucks can use different patterns on the rear hub, as the Performance Plus Tire 8-lug guide explains, so check the rear hub of any dually separately. For the equivalent question on 6-lug trucks, read our 6x139.7 wheel interchange guide.

Center bore and lug thread decide the rest of 8-lug wheel interchange

Once the bolt pattern matches, the center bore must match the hub or be filled with a hub-centric ring. A wheel with a bore smaller than the hub cannot be mounted, while a wheel with a larger bore needs a ring, and the ring wall is half the difference between the two diameters.

These rings only apply to wheels that already have the right bolt pattern, for example a custom wheel drilled 8x165.1 but bored for a Ford hub. Our article on hub-centric and lug-centric wheels explains how hub-centric mounting works.

Thread is the last check. The nut must match the stud, so a Ford M14x2.0 nut cannot go on an M14x1.5 Ram or GM stud, and the reverse. Order the lug nuts with the wheels, not after.

How to confirm your truck's pattern before any 8-lug wheel interchange

1. Measure from the center of one lug hole to the center of the hole directly opposite; eight lugs is an even count, so every hole has an opposite. Compare the result with 165.1, 170 and 180 mm.
2. Read the center bore from the hub itself, or from the factory wheel, and compare it with the table above.
3. Check the stud thread on the truck, and write down whether the stud is M14x1.5 or M14x2.0.
4. Confirm the model year, because GM changed pattern in 2011, and confirm whether the rear axle is a dually.
5. Run all four numbers through our fitment verification checklist before you commit to a build.

Forged 8-lug wheels cut to your pattern

Because 8-lug wheel interchange across the three patterns is not possible, a forged 8-lug wheel has to be made for one of them. Every ANKUSI wheel is cut to order: you give us the year, model and brake setup, and we machine the bolt pattern, center bore and offset to match, then confirm the spec before anything is cut. Wheels start from $220 per wheel; production takes 18–22 days and sea freight 30-35 days.

Several of our 8-lug designs suit a lifted truck: the mirror-milled mesh wheel with a yellow beadlock ring and the polished wide-spoke wheel with a bolted ring are both beadlock builds. Browse the full 8-lug heavy-duty forged wheel range or the off-road beadlock category, and send us your truck's details for a quote.

Going bigger on tires as well? Our 24-inch truck fitment guide covers the offset and clearance side of a 2500-class build.

Related forged wheels

Browse the full off-road forged wheel range, or see how the factory builds them in how forged wheels are made.