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Towing

This towing section gathers the hardware that connects a tow vehicle to a trailer and keeps the load stable: receiver hitches, ball mounts, gooseneck and fifth wheel gear, brake controllers, and load-leveling helpers. It suits truck, SUV, and Jeep owners hauling campers, utility trailers, or recovery rigs. Brands include Curt Manufacturing, B&W Hitch, AirLift, and DrawTite. Open a product page for details.

Smittybilt factory-style 2-inch receiver hitch in gloss black powder coat

Towing parts cover everything between your frame and the trailer tongue: receivers, ball mounts, pins, wiring, brake controls and the springs that keep a loaded truck level. Every piece carries its own rating, so the right part keeps a camper, flatbed or recovery trailer tracking straight.

Hitches and ball mounts make the mechanical connection. Brake controllers, harnesses and adapters handle the electrical side. Air springs and helper leaf springs firm up a sagging rear, while gooseneck and fifth wheel rails, sliders and brackets serve bed-mounted setups. Smaller groups cover locks, receiver covers, tie-downs, mud flaps and tow bars for flat-towing a Jeep behind a motorhome.

1,111Parts listed
63Brands
54Part types
1-1/4"–2-1/2"Receiver openings
4 to 7Trailer plug pins
5–100 psiLoadLifter 5000 air range

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Towing hardware reference

Common sizes and wiring conventions for the hardware in this section, plus ratings taken from listed products. Always confirm against the label on each part and your vehicle's door jamb.

Receiver and pin sizes

ReceiverHitch pin
Class I / II1-1/4" opening1/2" pin
Class III / IV2" opening5/8" pin
Class V and heavy duty2" or 2-1/2" opening5/8" or 3/4" pin

4-way flat plug

WhiteGround
BrownTail and running lights
YellowLeft turn and stop
GreenRight turn and stop

Load support options

Air springsHelper springs
How it worksAdjustable air bags at the axleExtra spring engages under load
AdjustmentChange pressure for each loadFixed, no air lines
Example in this sectionAirLift LoadLifter 5000SuperSprings SSA28
Listed supportUp to 5,000 lb load leveling800 to 6,000 lb added capacity
Tow rating changeNoneNone

7-way RV blade plug (common colors)

WhiteGround
BlueElectric trailer brakes
GreenTail and running lights
RedLeft turn and stop
BrownRight turn and stop
Black12V auxiliary power
Yellow (center)Reverse lights

Ratings from listed products

Trailer weightTongue / pin
Smittybilt JH45 hitch, 2-door2,500 lb250 lb
Smittybilt JH45 hitch, 4-door3,500 lb350 lb
Smittybilt 2932 aluminum ball mount8,000 lb800 lb
Smittybilt 2900 2" chrome ball6,000 lbNot listed
Reese Sidewinder 61300 turret19,500 lb3,900 lb pin
B&W GNXA4085 4" extender20,000 lb5,000 lb

Measure before you order

  • Receiver opening size and the pin hole diameter on your hitch
  • Ball diameter stamped on the trailer coupler (1-7/8", 2" or 2-5/16")
  • Ball shank diameter versus the hole in your ball mount
  • Trailer plug type: 4-way flat, 5-way, 6-way round or 7-way blade
  • Number of braked axles on the trailer, for brake controller choice
  • Bed length and rail spacing for gooseneck or fifth wheel hardware

Wire colors vary between manufacturers and older trailers. Check each circuit with a tester before your first trip, and never treat helper springs or air bags as a way to tow more.

All Towing 1,111 parts

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What belongs in a towing setup

A complete tow setup has several links: a hitch mounted to the vehicle, a ball mount or head, a coupler-compatible ball, wiring, and, for heavier trailers, a brake controller and some form of suspension support. Weak or mismatched parts in any link limit the whole system, so it helps to think of the setup as a chain rather than a shopping list of separate items.

This category spans bolt-on receiver hitches, drop and adjustable ball mounts, gooseneck and fifth wheel mounting hardware, hitch pins and locks, trailer wiring connectors, mud flaps, and air or leaf-spring helpers that firm up the rear of a loaded truck.

Know your ratings first

Start with the numbers on your vehicle's door-jamb label and in the owner's manual: gross vehicle weight rating, gross combined weight rating, and the maximum tow rating. Every component, including the hitch class, ball mount, ball, pin, and trailer coupler, has its own rating, and your usable capacity is the lowest of them all.

Tongue weight matters as much as total weight. A trailer that is too light on the tongue can sway, while one that is too heavy overloads the rear axle and lifts weight off the front wheels. Many tow guides suggest roughly 10 to 15 percent of trailer weight on conventional trailers, but follow the manufacturer's numbers.

Matching hitch type to the job

  • Receiver hitches come in classes, commonly I through V, with larger classes using 2-inch or 2.5-inch receiver openings and higher ratings.
  • Gooseneck and fifth wheel hitches mount in the truck bed and suit heavy livestock, equipment, and RV trailers.
  • Weight-distributing hitches and sway control spread tongue weight across the axles of the tow vehicle and trailer.
  • Drop and rise ball mounts level the trailer so the coupler sits at the right height.

Measure from the ground to the top of the receiver and to the coupler of a level trailer before choosing a drop or rise.

Supporting the load and installing safely

Air springs, helper leaf springs, and similar load-leveling kits reduce rear sag when the truck is loaded. They do not raise the vehicle's rated capacity, so never treat them as a way to exceed the ratings on the label.

Many hitches bolt to existing frame holes, but some require drilling, trimming plastic, or removing exhaust parts. Use a torque wrench, follow the specified bolt torque, and recheck after the first few trips. Confirm fitment for your exact year, make, and model, and check the manufacturer's specifications before installing. Professional installation is sensible for gooseneck, fifth wheel, and brake controller wiring.

Common mistakes to avoid

Towing problems usually come from mismatched parts rather than a single bad component. Typical errors include using a ball that is rated below the trailer, ignoring tongue weight, skipping safety chains, and forgetting to confirm that the wiring connector matches the trailer plug.

Before every trip, walk around the rig: check the coupler latch and pin, chain crossing, light function, tire pressure on both vehicles, and brake controller gain. Lock the hitch pin when parked to deter theft.

Popular Towing brands

Towing FAQ

What hitch class do I need?

Match the class to the heavier of your trailer's loaded weight and tongue weight, using the lowest rating in the whole system. Class III and IV 2-inch receivers handle many campers and utility trailers, while heavy trailers may need Class V or a gooseneck. Confirm against your owner's manual.

Do I need a brake controller?

Many states require trailer brakes above a certain trailer weight, and the threshold varies by state. If your trailer has electric brakes, you need an in-cab controller wired to the vehicle. Check local regulations and the trailer manufacturer's guidance.

Can air springs increase my towing capacity?

No. Air springs and helper springs reduce sag and improve stability under load, but your towing and payload limits are set by the manufacturer. Staying within the ratings on the vehicle's label is still required for safe towing.

How do I choose a ball mount drop?

Park the loaded trailer level, then measure from the ground to the top of the receiver opening and to the underside of the coupler. The difference, adjusted for ball height, tells you the drop or rise needed to keep the trailer level.