Are Ford, Ram, and GM puck systems the same size?

No. All three use a five-hole layout (four corner pucks plus a center gooseneck hole), but the pattern spacing is different on each, so they are not interchangeable. Ram is the most distinct; Ford and GM are close but not identical. A puck-mount fifth wheel hitch is built for one brand's pattern, so match the hitch to your make, model, and year.

Will a puck hitch from one truck fit another brand?

Generally no. The four-puck fifth wheel pattern differs between Ford, Ram, and GM. Ford and GM are close enough that a few adapters bridge both, but Ram stands alone. The one part that does interchange is the gooseneck ball — that connection is standardized. For the fifth wheel hitch itself, always buy the version matched to your exact truck.

Did GM change the puck dimensions between model years?

Yes. When GM redesigned the Silverado HD and Sierra HD for 2020, it moved the puck spacing. A 2016-2019 puck-mount fifth wheel hitch will not fit a 2020-or-newer GM truck, and vice versa. The gooseneck ball still carries over. So on GM, dimensions really do change by model year — match the hitch to 2016-2019 or 2020+.

What size is the gooseneck ball in a puck system?

The factory OE puck gooseneck ball is a standard 2-5/16 inch ball that drops into the center hole. It's the one truly standardized part of the system, which is why gooseneck balls interchange between Ford and GM trucks even though the fifth wheel patterns don't.

What are the exact puck spacing measurements?

Per the hitch makers' published specs (the truck makers don't list them), the four outer pucks are spaced center-to-center roughly: Ram 2500/3500 = 39 inches wide by 30-3/8 inches deep (the biggest pattern); GM 2016-2019 = 27 by 22 inches; Ford Super Duty = 30 by 13 inches; GM 2020+ = 22.3 by 13 inches (the tightest). The puck holes themselves are a standard size on all three (about 3 inches for the outer pucks, 4.25 inches for the center gooseneck). Note GM 2016-2019 is slightly narrower side-to-side than Ford but much deeper. You don't drill for factory pucks — just match the hitch to your make, model, and year.

Puck System Dimensions & Fitment

Written by a towing industry expert Updated July 2026

The short answer: All puck systems use the same 5-hole layout, but the spacing differs by brand and year — so hitches aren't interchangeable. Match to your exact truck.

The One Rule That Matters

Every factory puck system uses the same five-hole layout — four corner pucks for the fifth wheel hitch plus a center hole for a gooseneck ball — but the spacing is different on Ford, Ram, and GM, and it can change when a truck is redesigned. That means puck hitches are not interchangeable. Match the hitch to your exact make, model, and year.

Puck Spacing, to Scale

Pick a truck — the others stay faded behind it

center — gooseneck ball (shared) outer pucks colored by brand; others faded to compare

Ford Super Duty — 30″ × 13″, wide but shallow

Drawn to scale from the hitch-maker specs below (center-to-center). Factory pucks come pre-installed — this just shows how differently the brands are spaced.

Puck System Reference: By Brand & Year

Which pattern you have, and what fits it

Brand & Trucks	Years	Pattern notes	Matched hitch (example)
Ford Super Duty F-250/350/450	2011+	Consistent across years: 30" W × 13" D (center-to-center).	B&W RVK3300/3305 (Ford); CURT, Husky, PullRite "Ford" versions
Ram 2500 / 3500	2013+	The biggest pattern by far: 39" W × 30-3/8" D. Front and rear pucks differ in size.	B&W RVK3600 (Ram); Ram-specific only
GM Silverado & Sierra 2500HD/3500HD	2016–2019	27" W × 22" D (K2XX) — narrower than Ford side-to-side but much deeper. Different from 2020+.	B&W RVK3700 (2016-19 GM); year-specific legs
GM Silverado & Sierra 2500HD/3500HD	2020+	The tightest: 22.3" W × 13" D (T1XX). Moved in the 2020 redesign — won't take a 2016–2019 hitch.	B&W RVK3715 (2020+ GM)

Part numbers are examples to show fitment differs by truck — always verify the exact hitch for your year, make, and bed.

What Interchanges — and What Doesn't

The short version

✓ Interchanges

The gooseneck ball. It's a standard 2-5/16" ball, so it carries between Ford and GM — and the ball still fits when you jump between a truck's own model years.

✗ Doesn't

The four-puck fifth wheel pattern. It differs Ford → Ram → GM, and GM changed it in 2020. A 4-point puck hitch is year- and brand-specific.

Some adapters are built to bridge more than one pattern (a CURT OEM puck adapter, for example, lists both 2020+ GM and 2011+ Ford). Ram — the biggest pattern — tends to stand alone. And a gooseneck setup sidesteps the whole thing, since the ball is universal.

The Actual Puck Measurements

The spacing is published — by the hitch makers

The truck makers don't hand out a spec sheet, but the hitch makers do — it's in their fitment specs and install templates. First, two things that are the same on all three brands: the puck holes are a standard size (roughly a 3" outer hole and a 4.25" center gooseneck hole), so the only thing that changes brand to brand is how far apart the four pucks sit.

Outer puck spacing (center-to-center), most spread to tightest

• Ram 2500/3500: 39" wide × 30-3/8" deep — the biggest pattern by far (widest and deepest)
• GM 2016–2019 (Silverado/Sierra HD): 27" wide × 22" deep
• Ford Super Duty: 30" wide × 13" deep
• GM 2020+ (Silverado/Sierra HD): 22.3" wide × 13" deep — the tightest

The middle two flip depending on how you measure: GM 2016–2019 is a touch narrower side-to-side than Ford (27" vs 30"), but much deeper (22" vs 13"), so it's the more spread-out pattern overall.

Good to know

You don't drill for these — factory pucks come installed, and aftermarket puck kits come with their own template. These figures are here to show why the patterns aren't interchangeable, so you match the right hitch to your truck.