B&W Continuum Weight Distribution Hitch, 2" Shank, 2-5/16" Ball, Underslung Coupler (WDHK4501)
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Fits the same truck
Features
- Set Weight With a Pump Handle: Most weight distribution hitches are either loaded or unloaded. On the Continuum you pump a handle to move as much weight to the front axle as you want, and twist the needle valve knob to let it off again.
- One Bar Set, 600-1,600 lb: B&W teamed with Hendrickson for tapered composite spring bars built with Hendrickson's LITEFLEX technology. One set covers 600 to 1,600 lb of tongue weight, and B&W says composite flexes five times as much as steel at similar strength.
- Sway Prevention Already Working: The bars stay under load, so the friction that resists sway is there from the first foot of travel. B&W tested leading friction sway controls with the truck on air casters and found most take little force to overcome.
- Repeatable Setup on a Gauge: The head angle is preset and there is nothing to shim. A pressure gauge on the pump lets you return to the same setting every trip.
- All Setup on Driver's Side: Pump, gauge and needle valve are all on the trailer's driver side, so you set or release the load without walking around to the other side.
- Comes Apart When Not Needed: Hooking up a small trailer that needs no weight distribution? Lift off the spring bar assembly and pull it with the ball mount alone.
Description & Fitment
Got an underslung coupler and a 2" receiver? WDHK4501 pairs Continuum head unit WDHH4500 (2-5/16" ball, standard shank and drop) with load bar unit WDHL4511, which adds the hydraulic cylinder extension. B&W rates the hitch for 16,000 lb trailers and 600-1,600 lb tongue weight.
Fitment & Compatibility
Check your fit: a 2" receiver, a trailer with an A-frame and a underslung coupler, a trailer up to 16,000 lb and tongue weight between 600 and 1,600 lb.
Not for: a 2.5" receiver (use WDHK4503); a standard coupler (use WDHK4500); trailers without an A-frame coupler.
About B&W Trailer Hitches
Roger Baker and Joe Works founded B&W Trailer Hitches in 1987, working out of a garage where they built custom truck beds; the company name comes from their initials. Customers wanted a gooseneck ball that would not sit welded in the middle of the bed, and their answer was the Turnoverball: it mounts beneath the bed, and the ball flips over to stow in the same hole it tows from. The Companion fifth wheel hitch came next and uses the same under-bed mounting.
B&W still builds its hitches in Humboldt, Kansas, from American-made steel, and Joe Works began handing the company to its workers in 2007; today it is employee-owned. B&W counts itself among the few hitch makers still building in America.
Buying B&W from Prestige Truck. B&W honors its warranty whether or not you register the product, so there is no card to mail. Keep your Prestige Truck order email with your records in case you ever need to make a claim.
Frequently Asked Questions
What comes in WDHK4501?
Head unit WDHH4500 with the 2-5/16" ball and a 5/8" receiver pin, plus load bar unit WDHL4511 with the hydraulic pump and cylinder, cylinder extension and mounting hardware, per B&W.
Which coupler is WDHK4501 for?
An underslung coupler: its load bar unit adds the hydraulic cylinder extension.
How long does installation take?
In most cases 30 minutes or less, B&W says, and the one wrench you need is 9/16". The bar assembly comes put together and there is no head angle to set.
What if my load changes?
Add a few pumps on the handle to shift more weight to the front axle. B&W's design means no bar swap and no head adjustment for a change in tongue weight.
Will it fit my trailer frame?
B&W's manual calls for an A-frame coupler with rails about 2" wide and 5" to 6" tall; 4" to 7" rails work with alternate bolts available from B&W. The rails must sit 6" to 9" apart where it mounts, with 2" of open space behind the coupler.
Will the hydraulics leak?
B&W built the system as a closed loop, the type used on tractors and construction equipment. B&W's manual says the system relieves pressure automatically when it exceeds 3,000 psi, to protect the hitch, truck and trailer during overload events.
Specifications
| Brand | B&W Trailer Hitches |
|---|---|
| Part Number | WDHK4501 |
| System | Continuum Weight Distribution Hitch |
| Ball | 2-5/16" |
| Spring bars | Tapered composite, LITEFLEX by Hendrickson |
| Load adjustment | Hydraulic pump with pressure gauge; needle valve release |
| Head angle | Preset |
| Rating (complete hitch) | 16,000 lb max trailer weight; 600-1,600 lb tongue weight |
| Trailer | A-frame coupler only |
| Certification | SAE J-2638 |
| Made in | USA |
| Product | Continuum Weight Distribution Hitch (complete kit) |
| Shank size | 2" (fits a 2" receiver) |
| Shank length | Standard |
| Drop | Standard |
| Trailer coupler | Underslung |
| Head unit | WDHH4500 |
| Load bar unit | WDHL4511 |
| Rating | 16,000 lb max trailer weight; 600-1,600 lb tongue weight |
| Warranty | Limited Lifetime |
| UPC | 843233083224 |
Warranty, shipping & returns
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Lifetime Limited warranty
B&W Trailer Hitches covers this hitch with its Limited Lifetime Warranty. B&W's promise is simple: it stands behind what it builds, and when something goes wrong, it sets it right.- B&W builds its products to be free of design and quality defects. If you believe one falls short of that, B&W wants to make it right with you.
- Accident or misuse: B&W says it will still help you get towing again at the lowest cost and with the least hassle it can.
- Normal wear: the product and its finish age with use, and B&W does not promise to keep them in new condition.
- Use it only as designed and keep up the light maintenance B&W calls for.
- Registration is optional: B&W applies its warranty whether you register the product or not.
- To start a claim, contact us with your order number and photos and we will take it up with B&W for you.
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Free shipping
Ships free to the lower 48 states, with no minimum order.- Order by 5 PM ET on a business day and it starts processing the same day.
- Most orders arrive within 1-5 business days.
- We email your tracking number as soon as it ships.
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Inspect on delivery
Before installing, confirm your trailer has an A-frame coupler with room on the driver-side rail for the pump, and that the head unit, load bar box and bolt bag match the parts lists in B&W's manual. Check it as soon as it arrives.- Look for crushed ends, punctures or tears in the carton.
- If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
- Open the box and check the parts against the parts list before you install.
- Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.
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30-day returns
Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.- Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
- Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
- Changed your mind: you pay return shipping. No restocking fee.
- Refunds go back to your original payment method within 7 business days of approval. See our returns policy.