Best Trailer Equalizer Hitch: Practical Features for Easier Everyday Use

Best Trailer Equalizer Hitch

A strong trailer equalizer hitch distributes tongue weight, helps control sway, and matches your trailer’s rated load, making it suitable for owners who want steadier towing and more predictable setup. The 10 options here range from integrated two- and four-point sway-control systems to conventional chain-connected weight-distribution hitches. Capacity varies substantially: several models are rated for 10,000 pounds of trailer weight, while others cover 6,000, 8,000, or up to 14,000 pounds.

Included equipment also differs, with some kits supplying a shank, ball, brackets, or mounting tools and others requiring separate parts. Use your trailer’s actual tongue weight, gross trailer weight, receiver requirements, and frame dimensions as the final compatibility checks.

For the strongest combination of integrated sway control and established capacity, the Equal-i-zer 4-point Sway Control Hitch is rated for 10,000 pounds of trailer weight and 1,000 pounds of tongue weight. The Fastway e2 offers built-in two-point control for trailers up to 8,000 pounds, while CURT’s TruTrack 2P combines friction sway control with adjustable brackets. For heavier listed loads, CURT 17063 and CUBELLIN models reach 14,000 pounds, but buyers should verify tongue-weight range, included components, shank fit, and frame clearance before choosing.

Trailer Equalizer Hitches: Comparison

ImageProductBuy
Best Pick 1
Equal-i-zer 4-point Sway Control Hitch, 90-00-1001, 10,000 Lbs Trailer Weight Rating, 1,000 Lbs Tongue Weight Rating, Weight Distribution Kit DOES NOT Include Hitch Shank, Ball NOT Included
Equal-i-zer 4-point Sway Control Hitch, 90-00-1001, 10,000 Lbs Trailer Weight Rating, 1,000 Lbs Tongue Weight Rating, Weight Distribution Kit DOES NOT Include Hitch Shank, Ball NOT Included
Best for: Maximum sway control
Brand: Equal-i-zer | Compatible with Vehicle Type: Bus, Car, RV, Truck, UTV, Van
View on Amazon
Best Pick 2
Fastway ConnectTM Weight Distribution Hitch
Fastway ConnectTM Weight Distribution Hitch
Best for: Balanced towing
Brand: Fastway | Compatible with Vehicle Type: Trailer
View on Amazon
Best Pick 3
XtremepowerUS 1,000 lb Weight Distribution Hitch with Sway Control, Heavy Duty Trailer Towing Equalizer Kit, 2-Inch Shank for RV & Travel Trailers
XtremepowerUS 1,000 lb Weight Distribution Hitch with Sway Control, Heavy Duty Trailer Towing Equalizer Kit, 2-Inch Shank for RV & Travel Trailers
Best for: Heavy duty towing
Brand: XtremepowerUS | Compatible with Vehicle Type: Trailer
View on Amazon
Best Pick 4
CURT 17063 Round Bar Weight Distribution Hitch with Sway Control, 14,000 lb
CURT 17063 Round Bar Weight Distribution Hitch with Sway Control, 14,000 lb
Best for: Versatile trailer frames
Brand: CURT | Compatible with Vehicle Type: Trailer
View on Amazon
Best Pick 5
CURT 17601 TruTrack 2P Weight Distribution Hitch with Sway Control, 10K
CURT 17601 TruTrack 2P Weight Distribution Hitch with Sway Control, 10K
Best for: Round bar stability
Brand: CURT | Compatible with Vehicle Type: Truck
View on Amazon

How We Compared These Products

We compared dimensions, capacity, materials, compatibility, included components, and care requirements across many Amazon listings. These details matter because the product must fit the available space, intended use, setup requirements, and maintenance routine. After examining the wider field, we selected 10 products from Equal-i-zer, Fastway, XtremepowerUS, CURT, PROYONGOO, VEVOR, Dollate, and CUBELLIN.

The shortlist includes products such as Equal-i-zer 4-point Sway Control Hitch, Fastway ConnectTM Weight Distribution Hitch, and XtremepowerUS Every recommendation is tied to information stated for that specific product; unclear or missing features were treated as unknown rather than filled with assumptions.

Detailed Reviews: Best Trailer Equalizer Hitch

1. Equal-i-zer 4-point Sway Control Hitch, 90-00-1001, 10,000 Lbs Trailer Weight Rating, 1,000 Lbs Tongue Weight Rating, Weight Distribution Kit DOES NOT Include Hitch Shank, Ball NOT Included

Equal-i-zer 4-point Sway Control Hitch, 90-00-1001, 10,000 Lbs Trailer Weight Rating, 1,000 Lbs Tongue Weight Rating, Weight Distribution Kit DOES NOT Include Hitch Shank, Ball NOT Included

Best for: Maximum sway control.

Experience the highest level of resistance to trailer sway with the Equal-i-zer's Integrated 4-Point Sway Control system. This unique design effectively transfers trailer tongue weight to all axles, ensuring a safer ride by keeping the front of your tow vehicle firmly on the road.

Manufactured in the USA from American-made steel, this hitch provides unmatched quality and towing performance. Its integrated 4-point sway control system offers superior resistance to trailer sway. The weight-distributing design ensures a level ride by transferring tongue weight to the vehicle's axles, enhancing stability and control during towing.

Product Details

BrandEqual-i-zer
Compatible with Vehicle TypeBus, Car, RV, Truck, UTV, Van
Item Weight44 pounds
ManufacturerEqual-i-zer
Part Number90-00-1001
Manufacturer Warranty DescriptionLimited Lifetime Warranty
MaterialAlloy Steel
Additional Product Information
Maximum Towing Capacity10000 pounds
Model Number90-00-1001

Pros

  • Integrated 4-point sway control
  • Weight distributing design
  • Manufactured in the USA
  • Provides a safer ride

Cons

  • Hitch shank and ball not included

Ideal for RVs and travel trailers seeking maximum sway control and a stable towing experience. Ensure you have the necessary hitch shank and ball for installation and use.

2. Fastway ConnectTM Weight Distribution Hitch

Fastway ConnectTM Weight Distribution Hitch

Best for: Easy weight distribution adjustment.

Achieve a smoother, level tow with the Fastway Connect Weight Distribution Hitch, featuring hardened steel chains for improved load distribution. Easily adjust weight distribution by simply changing chain links, enhancing steering and braking control for less stressful towing situations.

This hitch provides a safer tow through effective weight distribution, restoring balance to your tow vehicle and alleviating load on the rear axle. The round bar arms and hardened steel chains connect to your trailer frame for easy adjustment. Enjoy improved steering and braking control, reducing stressful towing situations with this alloy steel construction.

Product Details

BrandFastway
Compatible with Vehicle TypeTrailer
Item Weight89 pounds
ManufacturerFastway Trailer Products
Part Number98-00-8100
MaterialAlloy Steel
Maximum Towing Capacity10000 pounds
Additional Product Information
Model Number98-00-8100

Pros

  • Hardened steel chains for load distribution
  • Fast and easy adjustment
  • Improved steering and braking control
  • Reduces stressful towing situations

Cons

  • Item weight is 89 pounds

Suitable for trailers needing straightforward weight distribution adjustments. Ensure your trailer frame is compatible with the chain connection points for optimal performance.

3. XtremepowerUS 1,000 lb Weight Distribution Hitch with Sway Control, Heavy Duty Trailer Towing Equalizer Kit, 2-Inch Shank for RV & Travel Trailers

XtremepowerUS 1,000 lb Weight Distribution Hitch with Sway Control, Heavy Duty Trailer Towing Equalizer Kit, 2-Inch Shank for RV & Travel Trailers

Best for: Heavy-duty travel trailers.

Gain confidence on the road with the XtremepowerUS Heavy-Duty Weight Distribution Hitch, supporting up to 1,000 lbs of tongue weight. Its design distributes tongue weight evenly, promoting a level towing position and enhancing overall stability and control for a comfortable ride.

Engineered for heavy-duty towing, this hitch supports up to 1,000 lbs of tongue weight and 10,000 lb gross vehicle weight. The alloy steel construction ensures durability for travel trailers, campers, and utility trailers. It effectively distributes tongue weight, leveling the load and improving control for a more comfortable and secure towing experience.

Product Details

BrandXtremepowerUS
Compatible with Vehicle TypeTrailer
Included ComponentsWeight Distribution Hitch Bar
ManufacturerXtremepowerUS
Part Number22005
Manufacturer Warranty Description90 days
MaterialAlloy Steel
Additional Product Information
Maximum Towing Capacity1000 pounds
Model Number22005

Pros

  • 1,000 lb tongue weight capacity
  • Heavy-duty construction
  • Improves stability and control
  • Provides a smoother ride

Cons

  • 90-day manufacturer warranty

A solid choice for travel trailers and campers requiring robust weight distribution. Verify that the 2-inch shank fits your existing receiver for proper installation.

4. CURT 17063 Round Bar Weight Distribution Hitch with Sway Control, 14,000 lb

CURT 17063 Round Bar Weight Distribution Hitch with Sway Control, 14,000 lb

Best for: Smoother, controlled towing.

Experience smoother, more controlled towing with the CURT 17063 Round Bar Weight Distribution Hitch, featuring integrated sway control. This hitch distributes trailer tongue weight to level the load, improve control, and enhance the ride quality for a confident journey.

This carbon steel hitch is fabricated for reliable strength and includes sway control kit #17200 to reduce trailer sway. Integrated grease zerk fittings in the hitch head allow for easy lubrication at the spring bar mounts, ensuring proper operation. Rated for 10,000-14,000 lb GTW and 1,000-1,400 lb TW, it provides a comfortable ride.

Product Details

BrandCURT
Compatible with Vehicle TypeTrailer
Included ComponentsRound Bar WD Hitch
Item Weight100 pounds
ManufacturerCurt Manufacturing
Part Number17063
Manufacturer Warranty DescriptionLimited Lifetime Warranty (One-Year Finish, One-Ye
Additional Product Information
MaterialCarbon Steel
Model Number17063
Additional InformationImportant information

Pros

  • Integrated sway control kit
  • Easy lubrication access
  • Reliable strength
  • Levels the load for smoother ride

Cons

  • Requires grease application for proper operation

Designed for trailers up to 14,000 lbs seeking enhanced stability and ride comfort. Ensure you have a 2-5/16" trailer ball, as it is included with this kit.

5. CURT 17601 TruTrack 2P Weight Distribution Hitch with Sway Control, 10K

CURT 17601 TruTrack 2P Weight Distribution Hitch with Sway Control, 10K

Best for: Integrated passive sway control.

The CURT 17601 TruTrack 2P Weight Distribution Hitch integrates passive sway control directly into its design, reducing sway and keeping your trailer aligned. Its two points of sway control use friction to resist lateral movement for a smoother towing experience.

This advanced system combines precise weight distribution with passive sway control, offering a smoother ride. The adjustable brackets provide fixed support, and the head tilt adjustment simplifies setup. Utilizing friction to resist lateral movement, it ensures your trailer stays aligned, enhancing control and stability for trucks and compatible vehicles.

Product Details

BrandCURT
Compatible with Vehicle TypeTruck
Included ComponentsTruTrack 2P WD Hitch
Item Weight94 pounds
ManufacturerCurt Manufacturing
Part Number17601
Manufacturer Warranty DescriptionLimited Lifetime Warranty (One-Year Finish, One-Ye
Additional Product Information
MaterialCarbon Steel
Maximum Towing Capacity10000 pounds
Model Number17601
Additional InformationImportant information

Pros

  • Integrated sway control
  • Friction-based sway resistance
  • Adjustable brackets
  • Simplified setup

Cons

  • Maximum towing capacity is 10,000 pounds

Ideal for truck owners who want integrated sway control without add-on components. Verify compatibility with your trailer frame for optimal performance.

6. Fastway e2 2-Point Sway Control Round Bar Hitch, 94-00-0800, 8,000 Lbs Trailer Weight Rating, 800 Lbs Tongue Weight Rating, Weight Distribution Kit Includes Standard Hitch Shank, Ball NOT Included

Fastway e2 2-Point Sway Control Round Bar Hitch, 94-00-0800, 8,000 Lbs Trailer Weight Rating, 800 Lbs Tongue Weight Rating, Weight Distribution Kit Includes Standard Hitch Shank, Ball NOT Included

Best for: No backing restrictions.

The Fastway e2 2-Point Sway Control Round Bar Hitch offers a complete solution with built-in sway control, eliminating the need for add-on hassles. Enjoy the convenience of leaving the e2 attached, as it has no backing or turning restrictions, making it perfect for RVs and trucks.

This alloy steel hitch system combines sway control and weight distribution in one unit, removing the need for separate chain-style hitches or cumbersome add-ons. Its design allows for unhindered backing and turning, regardless of weather or angle. Rated for 8,000 lbs trailer weight and 800 lbs tongue weight, it fits RVs and trucks.

Product Details

BrandFastway
Compatible with Vehicle TypeRV, Truck
Included ComponentsProgress Mfg 94-00-0800 Fastway E2 8K Wd Hitch
Item Weight78 pounds
ManufacturerFastway Trailer Products
Part Number94-00-0800
Manufacturer Warranty Description10-year limited warranty
Additional Product Information
MaterialAlloy Steel
Maximum Towing Capacity8000 pounds
Model Number94-00-0800

Pros

  • Built-in sway control
  • No backing or turning restrictions
  • Complete solution in one system
  • Suitable for RVs and trucks

Cons

  • Ball not included

Best for RV and truck owners seeking a hassle-free, integrated sway control system that doesn't limit maneuvering. Ensure you purchase a compatible hitch ball separately.

7. 6000 Lbs Weight Distribution Hitch, 7in Applicable Trailer Frames Travel Trailer Towing Hitch Bar Kit, Weight Distribution Hitches with Sway Control, Equalizer Hitch for RV, Campers, Boat

6000 Lbs Weight Distribution Hitch, 7in Applicable Trailer Frames Travel Trailer Towing Hitch Bar Kit, Weight Distribution Hitches with Sway Control, Equalizer Hitch for RV, Campers, Boat

Best for: Durable steel construction.

Constructed from premium #45 steel with a spray molding process, this 6000 lbs Weight Distribution Hitch is engineered for longevity and resistance to rust. It provides a strong towing capacity suitable for travel trailers, campers, and boats, ensuring robust daily use.

This carbon steel hitch bar kit offers a robust towing capacity of 6000 lbs, suitable for various trailers. Its durable material and sturdy connection are designed for long-lasting daily use, resisting rust. The hitch features multiple holes on both sides for adjustment, accommodating trailer frames up to 7 inches wide.

Product Details

BrandPROYONGOO
Included Components1*Weight Distribution Hitch, 1* Wrench, 1*English Manual, Other Accessories for Assembly
ManufacturerPROYONGOO
Part Number6000 Lbs Weight Distribution Hitch
Manufacturer Warranty Descriptionno
MaterialCarbon Steel
Maximum Towing Capacity2721.55 kg
Additional Product Information
Model Number6000 Lbs Weight Distribution Hitch

Pros

  • Crafted from premium #45 steel
  • Resistant to rust
  • Strong towing capacity
  • Accommodates trailer frames up to 7 inches

Cons

  • No manufacturer warranty provided

A durable option for travel trailers, campers, and boats with frames up to 7 inches wide. Confirm the 6000 lbs capacity meets your specific towing needs.

8. VEVOR Sway Control Weight Distribution Hitch, 1,500 lbs Capacity, Trailer Hitch Kit with 2-Inch Solid Steel Shank, 2-5/16 Inch Alloy Steel Ball, Powder-Coated Load Leveling, Black

VEVOR Sway Control Weight Distribution Hitch, 1,500 lbs Capacity, Trailer Hitch Kit with 2-Inch Solid Steel Shank, 2-5/16 Inch Alloy Steel Ball, Powder-Coated Load Leveling, Black

Best for: All-weather stability.

Experience exceptional stability with the VEVOR Sway Control Weight Distribution Hitch, featuring a Four-Way Dynamic Stability System forged from high-tensile alloy steel. This design offers superior deformation resistance and all-weather security for long-distance towing.

Forged from high-tensile alloy steel, this hitch ensures structural integrity and deformation resistance, providing all-weather security. The 4-point sway control system neutralizes inertia forces from all directions, stabilizing turning and reversing for a quieter, smoother drive. Its heavy-duty construction with baked enamel surface treatment prevents rust.

Product Details

BrandVEVOR
Compatible with Vehicle TypeRV, Trailer
Included Components1 x Bolts Kit, 1 x Pin Kit, 1 x Weight Distribution Hitch
Item Weight84 pounds
ManufacturerVEVOR
Part NumberEasy Installation2
Material40Cr, 42CrMoA, Q355B, solid
Additional Product Information
Maximum Towing Capacity6.8 tons
Model NumberHL10000

Pros

  • Four-Way Dynamic Stability System
  • High-tensile alloy steel construction
  • All-weather security
  • Rust-preventative finish

Cons

  • Specific tongue weight capacity not detailed

Ideal for RVs and trailers requiring robust, all-weather stability and sway control. Ensure the 1,500 lbs capacity is suitable for your trailer's tongue weight.

9. Weight Distribution Hitch with Sway Control Bar, Anti Sway Control Hitch

Weight Distribution Hitch with Sway Control Bar, Anti Sway Control Hitch

Best for: Optimized weight balance.

Achieve optimized weight distribution and reduced sway with the Dollate Weight Distribution Hitch. This kit balances weight between trailer and towing vehicle, improving steering and braking performance for a smoother, more comfortable travel experience.

The spring bars and other devices in this stainless steel hitch counteract sway during towing, keeping the trailer aligned with the vehicle. It improves tire grip, traction, and overall stability, allowing for more effective navigation of various road conditions. The adjustable square shank and hitch head contribute to a balanced and controlled towing setup.

Product Details

BrandDollate
Compatible with Vehicle TypeTruck
Included ComponentsRV weight Distributing Hitch
Item Weight98.1 pounds
ManufacturerDollate
Part Number1
Manufacturer Warranty Description1
Additional Product Information
MaterialStainless Steel
Model Number179115-DOL-PO

Pros

  • Optimized weight distribution
  • Reduces sway
  • Improves steering and braking
  • Enhances tire grip and traction

Cons

  • Only a 1-year manufacturer warranty

Suitable for truck owners seeking improved control and stability through balanced weight distribution. Verify the stainless steel construction meets your durability expectations.

10. Weight Distribution Hitch RV Equalizer Hitch

Weight Distribution Hitch RV Equalizer Hitch

Best for: Heavy-duty, adjustable connection.

Handle heavy loads up to 14,000 lbs with the CUBELLIN Weight Distribution Hitch, engineered from high-grade #45 steel with a protective spray-molded finish. Its robust and adjustable chain-link connection ensures strength and flexibility for easy setup.

This heavy-duty hitch is constructed from #45 steel and features a spray molding process for durability and a protective finish. The robust chain-link connection is designed to withstand extreme tension while providing flexibility for precise and easy setup. It includes all necessary mounting parts and accommodates trailer frames up to 7 inches wide.

Product Details

BrandCUBELLIN
Included Components1x Crowbar, 1xEnglish Manual, 1xWeight Distribution Hitch
ManufacturerCUBELLIN
Part NumberTrailer Hitches
Manufacturer Warranty Description3 months warranty
Material#45 Steel
Maximum Towing Capacity6350.29 kg
Additional Product Information
Model NumberWeight Distribution Hitch

Pros

  • 14,000 lbs capacity
  • High-grade #45 steel construction
  • Robust and adjustable chain-link connection
  • Complete kit included

Cons

  • Short 3-month warranty

Ideal for towing tasks requiring a high capacity and durable build. Ensure the 7-inch applicable trailer frame width is compatible with your setup.

What Buyers Often Overlook

Capacity, tongue weight, and receiver fit

Choose capacity from the trailer’s loaded gross weight and tongue weight, not from the largest number in a product title. The Equal-i-zer 90-00-1001 is rated for 10,000 pounds of trailer weight and 1,000 pounds of tongue weight. Fastway’s e2 94-00-0800 is rated for 8,000 and 800 pounds respectively.

CURT 17063 is described as covering 10,000–14,000 pounds of gross trailer weight and 1,000–1,400 pounds of tongue weight, while CURT 17601 is rated for 10,000 pounds. Other listings state 6,000 pounds for PROYONGOO and 14,000 pounds for CUBELLIN.

Confirm that the receiver, vehicle, trailer, and hitch all support the intended load. Also check the shank: Equal-i-zer does not include one, Fastway e2 includes a standard shank, and VEVOR lists a 2-inch solid-steel shank.

The Key Product Trade-Off

Sway-control design and setup trade-offs

Integrated sway control can reduce separate setup steps, but each design has different fit and operating considerations. Equal-i-zer uses an integrated four-point system, while Fastway e2 uses built-in two-point control and states that it can remain attached when backing up and making tight turns. CURT TruTrack 2P uses two friction points, fixed-support adjustable brackets, and head-tilt adjustment that avoids washer-based setup.

CURT 17063 includes a separate sway-control kit and grease zerks at the spring-bar mounts, so ongoing lubrication is part of proper operation. Fastway CONNECT uses hardened steel chains and changes weight distribution by selecting a different chain link.

PROYONGOO and CUBELLIN also use chain-linked designs, with CUBELLIN listing a maximum trailer-frame fit of 7 inches. Verify bracket space and installation requirements before prioritizing a sway-control style.

Best Trailer Equalizer Hitch: Buyer's Guide

Fit, Dimensions, and Compatibility

Compare the listed dimensions with the intended counter, cabinet, appliance, storage, or installation space. Confirm model compatibility and connection requirements where they are supplied. A useful feature cannot compensate for a product that does not physically fit or work with the buyer’s existing setup.

Capacity, Output, and Operating Format

Match listed capacity, volume, output, and operating mode to the actual household or work routine. Larger figures can support heavier use, while a smaller format may be easier to place and maintain. Treat daily output, immediate storage, and container capacity as separate specifications when the listing distinguishes them.

Materials, Construction, and Care

Use the listed materials and care instructions to judge cleaning effort, storage conditions, and compatibility with the intended use. Dishwasher, freezer, food-contact, or weather-related claims are included only when supplied for that product. Check whether routine care fits the way the product will be used.

Included Components and Setup Needs

Review the included components before planning installation or first use. Hoses, adapters, lids, paddles, bowls, brushes, controls, and manuals vary by listing. Confirm power, water, assembly, or accessory requirements from the supplied product information rather than assuming that separately pictured parts are included.

Which Should You Choose?

Choose the Equal-i-zer 4-point system if your trailer is within 10,000 pounds and you want integrated sway control with a limited lifetime warranty. Choose Fastway e2 when an 8,000-pound rating, built-in two-point control, included standard shank, and no stated backing or turning restrictions fit your setup. CURT TruTrack 2P suits buyers who want friction sway control integrated with adjustable brackets and head-tilt adjustment.

CURT 17063 fits a heavier 10,000–14,000-pound range and includes a ball and sway-control kit. Fastway CONNECT favors chain-link adjustment.

Consider PROYONGOO or VEVOR only after confirming their listed capacity and fit details; choose CUBELLIN for its 14,000-pound claim and 7-inch frame limit, while noting its three-month warranty.

Quick Buying Checklist

  • Confirm the complete dimensions against the available space.
  • Verify model, accessory, connection, and appliance compatibility.
  • Match capacity or output to the expected amount of use.
  • Compare materials and care instructions with the maintenance routine.
  • Check the included components before planning setup or first use.
  • Confirm listed power, water, storage, or installation requirements where applicable.

Frequently Asked Questions

What is the primary function of a trailer equalizer hitch?

An equalizer hitch, also known as a weight distribution hitch, redistributes the trailer’s tongue weight to the tow vehicle’s axles. This prevents the trailer from sagging the rear of the tow vehicle, improving stability and handling for a safer towing experience.

How do I determine the correct weight capacity for my hitch?

Select a hitch with a trailer weight rating and tongue weight rating that exceeds your trailer’s loaded weight and tongue weight. Always check your tow vehicle’s and trailer’s specifications to ensure compatibility and safe operation.

What is the difference between 2-point and 4-point sway control?

2-point systems typically use spring bars to distribute weight and offer some sway control. 4-point systems add additional friction or rigid points to actively resist trailer sway, providing more robust control, especially in challenging conditions.

Do I need to purchase a hitch ball separately?

Some weight distribution hitches include the hitch ball, while others do not. Always check the product description carefully to see if a hitch ball is included. If not, you will need to purchase one with the correct size and rating.

Can I use a weight distribution hitch with any trailer?

Weight distribution hitches are generally suitable for travel trailers and RVs. Ensure the hitch’s specifications, particularly the frame size compatibility, match your trailer’s A-frame for proper installation and effective weight distribution.

Final Words

Choosing the right trailer equalizer hitch balances your towing needs with trailer weight. For robust sway control and heavy loads, consider 4-point systems. Lighter towing setups might benefit from simpler 2-point or basic sway control models.

Always verify weight ratings and compatibility for safe, stable towing.