What you need to tow a boat trailer
Boat trailers are the exception to almost every towing rule of thumb — different brakes, different tongue weight, and hardware that gets dunked in water on every trip.
The core kit at 3,500 lb (a typical boat trailer)
- RequiredClass 2 hitch (1-1/4 in receiver)
A 3,500 lb trailer needs a hitch rated at or above 3,500 lb gross trailer weight. Class 2 hardware is rated to 3,500 lb with 350 lb tongue weight. Ratings are set per part number — check the sticker on the hitch itself, and remember your vehicle's own tow rating still governs if it is lower. Note: your tongue weight can reach 525 lb, which is above the 350 lb weight-carrying tongue rating for this class. That is not a contradiction — a receiver carries two ratings, and its weight-distributing tongue rating is higher. It is exactly why the weight-distributing hitch below is not optional. Check both numbers on the hitch's own sticker.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RequiredBall mount rated above 525 lb tongue weight
Boat trailers sit outside the usual 10–15% band — Chevrolet says to use the tongue weight in your trailer's own owner's manual. Size the mount above that figure. Size the drop or rise so the trailer sits level when coupled — measure your receiver height and your coupler height first; a nose-high or nose-down trailer moves weight off the axles and starts sway.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RequiredHitch ball — 1-7/8 in or 2 in
The ball must match the size stamped on your coupler exactly. Ball diameter MUST match the coupler size stamped on your trailer coupler. An undersized ball lets the trailer bounce loose. Capacity varies by part number. At 3,500 lb the sizes rated to carry it are 1-7/8 in or 2 in, but the coupler decides, not the weight. Full ball and coupler size chart →
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RequiredNothing to buy for braking — confirm it is surge
Surge brakes are a self-contained hydraulic system on the trailer, activated as the coupler pushes against the hitch ball when you slow down. They need no controller and no cab wiring. Look at the coupler: a surge actuator is a visibly longer, sliding coupler body with a master cylinder in it. If instead your trailer has electric brakes, you do need a controller — check before you buy anything.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - Required4-pin or 5-pin wiring
Surge brakes carry no brake signal, so a 4-pin flat covering lights is often all you need. Many surge trailers use a 5-pin, where the extra pin locks the actuator out when you reverse so the trailer does not brake against you backing down a ramp.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RequiredSafety chains rated for the trailer
Chains must be rated at or above 3,500 lb and cross under the tongue in an X, so the tongue is caught rather than dropped if the coupler releases.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RecommendedHitch pin and lock
Keeps the ball mount in the receiver and makes it much harder to walk off with. Match the pin diameter to your receiver (1-1/4 in).
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RecommendedTowing mirrors
If the trailer is wider than your vehicle you must be able to see down both sides of it. Many states require it; all of them make it safer.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RecommendedTongue weight scale
Tongue weight is the one number nobody publishes for you — it depends entirely on how you load the trailer. A scale is the only way to know you are inside 350–525 lb instead of guessing.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
What is different about a boat trailer
- RecommendedSubmersible (sealed LED) trailer lights
Standard bulbs crack when a hot filament hits cold water at the ramp. Sealed LED units are the fix, and they are the single most common boat-trailer failure people replace twice before buying the right ones.
Find it on Amazon →Affiliate link — as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. - RecommendedBearing protectors
Hub bearings go from hot to submerged in seconds, and the pressure drop pulls water past the seal. Bearing protectors keep positive grease pressure on the seal.
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"The most common trailer braking systems are electric brakes (often used on travel trailers, horse trailers and car haulers) and surge brakes (found primarily on boat trailers). An electric trailer brake system uses a brake control unit mounted inside the trailering vehicle; it operates by sensing the vehicle brakes and then applying the trailer brakes. Surge brakes are a self-contained hydraulic brake system on the trailer, activated during deceleration as the trailer coupler pushes on the hitch ball."
— 2025 Chevrolet Trailering Guide, p.6 (Trailer Brakes)
Common questions
Do I need a brake controller for a boat trailer?
Usually not. Boat trailers typically run surge brakes, which are self-contained hydraulics on the trailer, activated as the coupler pushes against the hitch ball when you slow down. No controller is required. Confirm which system your trailer actually has before buying anything — an electric-braked boat trailer does need one.
What tongue weight should a boat trailer have?
Boat trailers are an explicit exception. Chevrolet's guide says some trailer types — especially boat trailers — fall outside the usual 10–15% band, and that the figure in the trailer's owner's manual should be observed instead. Use that number, not a rule of thumb.
What hitch do I need for a boat trailer?
Size it to the loaded weight, not to the type. At 3,500 lb that is Class 2 hardware in a 1-1/4 in receiver. Weigh yours loaded — a boat trailer at its GVWR can need a different class entirely.
Your exact weight
Towing something else?
Source: 2025 Chevrolet Trailering Guide, p.8-9 (Tongue Weight / Loading Your Trailer) · last verified 2026-08-29