Replacement or upgrade shank for Equal-i-zer "no shank" weight distribution hitch systems. Fits 2-1/2" receivers. 9" drop and 13" rise — asymmetrical for significantly lifted HD trucks. 12" overall length. 16,000 lb GTW rating. High-grade American steel with hand-dipped paint finish. Adjustability measured from inside top of receiver to base of hitch ball.
The shank is the component that bridges your tow vehicle's hitch receiver to the Equal-i-zer hitch head — and selecting the right drop is as critical as selecting the right hitch. If the shank doesn't position the hitch ball at the correct height to keep the trailer level, weight distribution performance suffers and tongue weight is not transferred correctly to the tow vehicle's front axle.
The 90-02-4425 is Equal-i-zer's 2-1/2" receiver shank with 9" of drop and 13" of rise — an asymmetrical profile designed for setups where the receiver sits significantly higher than the trailer coupler, most commonly on HD trucks with lift kits or factory high-clearance ride heights, or where the trailer's coupler sits notably higher than the receiver when flipped to rise orientation. At 12" in overall length and built from high-grade American steel with a hand-dipped paint finish, this shank is sized for the demands of Class V towing at up to 16,000 lb GTW. It's designed for use with Equal-i-zer "no shank" hitch systems — those sold without a shank included so the buyer can select the exact shank needed for their vehicle.
Asymmetrical profile — 9" of drop for high receivers, 13" of rise when flipped for very low receivers towing high-coupler trailers
Sized for the 2-1/2" receiver tube found on HD trucks — rated for Class V towing up to 16,000 lb GTW
Built from the highest-grade American steel by Progress Mfg. — same material standards as the rest of the Equal-i-zer system
Full-coverage hand-dipped paint provides superior corrosion resistance compared to spray-applied finishes
1. "No Shank" systems only: The 90-02-4425 is designed for Equal-i-zer weight distribution hitches sold without a shank — typically ordered when the standard shank doesn't provide the correct drop or rise for the buyer's tow vehicle. If your Equal-i-zer system came with a shank included, you already have the correct shank for standard setups — this is a replacement or upgrade option. 2. Measure your required drop carefully: Equal-i-zer measures shank adjustability from the inside top of the receiver to the base of the hitch ball — not from the top of the receiver opening. Follow Equal-i-zer's shank selection procedure to calculate your specific drop before ordering: • Measure from the ground to the inside top of the receiver (loaded, on level ground) • Measure from the ground to the trailer coupler height (trailer loaded, on level ground) • The difference determines your required adjustment 3. Asymmetrical drop/rise: The 90-02-4425 has a 9" drop but a 13" rise when flipped — not symmetrical. Confirm which orientation and which measurement is correct for your setup before ordering. If you need a 9" rise specifically, this is not the correct shank.
The Equal-i-zer weight distribution system has two distinct major components that are sometimes confused: Shank (This Product — 90-02-4425): The component that slides into the tow vehicle's hitch receiver. It provides the correct drop or rise to level the trailer and supports the hitch head assembly. The shank is selected based on your tow vehicle's receiver height and your trailer's coupler height. Hitch Head: The component that contains the spring arm sockets and hitch ball — it provides weight distribution and sway control. The hitch head is selected based on your trailer's tongue weight and GTW rating (e.g., 90-02-1000 for the 1,000 lb TW model). Both components must be correct for the system to work properly. The shank determines ball height and level; the hitch head determines weight distribution capacity and sway control performance.
Equal-i-zer measures shank adjustment from the inside top of the receiver to the base of the hitch ball. Follow these steps: 1. Load your tow vehicle as it will be during towing (passengers, cargo, hitch weight) 2. Measure from the ground to the inside top of the receiver opening on a level surface 3. Load your trailer as it will be during towing 4. Measure from the ground to the trailer coupler height 5. Calculate the difference: If the receiver is higher than the coupler, you need a drop shank. If the coupler is higher than the receiver, you need a rise shank 6. Use Equal-i-zer's Shank Calculator at equalizerhitch.com for a guided calculation based on your specific measurements Contact Equal-i-zer at (800) 478-5578 for shank selection assistance.
In The Package: • (1) 90-02-4425 Adjustable Shank — 2-1/2" Receiver, 9" Drop / 13" Rise NOT Included: • Equal-i-zer hitch head (sold separately — select based on tongue weight rating) • Spring arms, sway control brackets, hitch ball, or other hitch components • Receiver hitch pin/lock (see Fastway 86-00-3160 for 2-1/2" locking hitch pin)
Equal-i-zer / Progress Mfg.: Phone: (800) 478-5578 Website: equalizerhitch.com Shank Selection Tool: equalizerhitch.com → "Shank Calculator" Made in the USA
All 2-1/2" Equal-i-zer shanks share the same 12" overall length, American steel construction, hand-dipped paint finish, and Class V GTW rating. Select by drop/rise.
Use Equal-i-zer's Shank Calculator at equalizerhitch.com or call (800) 478-5578 to confirm which shank is correct for your specific tow vehicle and trailer combination before ordering.