One Month Later: Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″ Review
When you’re dealing with hitch systems, especially those designed for sway control, precision and adaptability are paramount. My search for a more versatile solution to accommodate varying trailer heights and tow vehicle configurations led me to the Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″. This adjustable shank is designed to integrate seamlessly with the robust Equal-i-zer sway control hitches, promising to solve common leveling issues. Initially, I was experiencing a persistent tilt with my current setup, and it was becoming a concern for both ride quality and safety.
Upon receiving the shank, my first impression was one of solid engineering. The material felt substantial, with a durable-looking finish that suggested it could withstand the rigors of frequent use and exposure to the elements. It’s a critical component, bridging the gap between the receiver hitch and the trailer’s tongue weight system. I had briefly considered some generic, less adjustable shanks, but the specific compatibility and the broad adjustment range offered by this Progress MFG model made it the standout choice for my needs. The immediate feeling was one of relief, knowing I had a high-quality component to address a nagging problem.
Real-World Testing: Putting Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″ to the Test
First Use Experience
My initial test of this adjustable shank involved connecting it to my 2.5-inch receiver hitch on my truck and then attaching my 10K Equal-i-zer hitch head. The primary scenario was a routine tow of my travel trailer, a trip that typically involves highway speeds and some varied terrain. I specifically chose a route that would test its stability and ease of adjustment.
The shank performed admirably, holding the hitch head securely without any discernible movement or play, even during sharp turns or sudden braking. Adjusting the height was straightforward; the multiple bolt hole configurations allowed me to achieve a near-perfectly level trailer, which was a welcome change from my previous setup. There was a slight learning curve in determining the optimal hole for the desired drop or rise, but this is inherent to any adjustable shank and was quickly mastered.
Extended Use & Reliability
After a solid month of use, including a few longer trips and regular short hauls, the shank continues to perform without a hitch, pardon the pun. It has endured rain, sun, and the occasional splash of mud, and shows no signs of rust or corrosion on its finish. The bolt holes remain clean, and the hardware, which I torqued to spec, shows no indication of loosening.
In terms of durability, this Progress MFG shank feels built to last. Compared to other adjustable shanks I’ve encountered, this one feels more robust, lacking any of the common issues like hole elongation or excessive flex under load. Maintenance has been minimal, consisting of a quick wipe-down after particularly dirty trips and ensuring the bolts remain snug. I haven’t needed to disassemble it for any cleaning, which speaks volumes about its initial design and material quality.
Breaking Down the Features of Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″
Specifications
The Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″ is engineered for versatility and strength. Its primary function is to provide a significant range of height adjustment for sway control hitches, accommodating a wide array of tow vehicle and trailer combinations. This model specifically offers a substantial 12 inches of drop and a 15-inch rise, providing ample flexibility for most setups.
It is designed to work with specific Equal-i-zer sway control hitch models, including the 6K, 10K, 12K, and 14K no-shank models. This ensures a secure and direct fitment for those particular hitch heads. The shank itself is built to fit standard 2-inch or 2.5-inch receiver tubes, a common size found on most trucks and SUVs.
Crucially, the mounting holes for the hitch head are precisely spaced at 1-1/4 inches on center, a standard that ensures compatibility with the intended Equal-i-zer hitch heads. The overall length of the shank is 12 inches, providing a solid structural foundation for the adjustable mechanism. Constructed from heavy-duty steel with a durable black powder coat finish, it’s built to withstand significant towing forces and environmental exposure. This robust construction is essential for towing safety and longevity.
Performance & Functionality
In terms of its core job, this adjustable shank excels. Its main function is to allow for precise leveling of the trailer relative to the tow vehicle, and it does this exceptionally well. The extensive drop and rise capabilities mean that achieving a level tow, even with significant differences in hitch height between the vehicle and trailer, is straightforward. This level towing not only improves ride comfort but also significantly enhances towing stability and sway control performance.
The strengths of this shank lie in its impressive adjustment range and the secure way it holds the hitch head. I experienced no wobble or slop, even on rough roads. A minor point for consideration, though not a significant weakness, is that with such a long shank, ensuring the receiver hitch on the tow vehicle is also of robust construction is paramount. It handles its primary duty of providing height adjustment and securely mounting the hitch head flawlessly.
Design & Ergonomics
The design of this shank is fundamentally practical and user-focused, prioritizing functionality over aesthetic flourishes. The heavy-duty steel construction and the protective black powder coat finish speak to its intended purpose: durability and resilience in demanding outdoor environments. The shank feels solid and weighty, conveying a sense of confidence in its structural integrity.
Ergonomically, adjusting the height is simple, requiring only basic tools. The pre-drilled holes are clean and well-defined, making it easy to align bolts for the desired setting. There’s no complex mechanism to learn; it’s a direct mechanical adjustment. The smooth finish also means it’s relatively easy to wipe down and keep clean, minimizing grime accumulation in the bolt holes, which is a common annoyance with lesser designs.
Durability & Maintenance
From my experience over the past month, the Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″ appears to be built for the long haul. The steel appears to be high-grade, and the powder coat finish is holding up remarkably well against minor abrasions and the elements. I anticipate this shank will last for many years of regular towing without issue.
Maintenance is refreshingly simple. A periodic visual inspection to ensure all bolts are tight is generally all that’s required. If it gets particularly dirty, a quick spray with a hose and a wipe-down is usually sufficient. I haven’t encountered any rust spots, and the bolt holes remain free of excessive debris. The robustness of the material suggests it can withstand significant stress, making it a reliable component for heavy-duty towing.
Accessories and Customization Options
This particular product, the Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″, is essentially a single, highly functional component. It doesn’t come with a wide array of accessories in the traditional sense. However, its design is inherently about integration and compatibility. It is specifically built to mate with Progress MFG’s own Equal-i-zer sway control hitch heads.
The “customization” aspect comes from its ability to be configured in multiple height positions. The multiple bolt hole patterns are the key feature here, allowing users to dial in the exact drop or rise needed. Users will, of course, need to supply their own receiver hitch pins and bolts, typically a 2-1/2 inch diameter pin and appropriate locking hardware, which are often sold separately or come with the hitch head itself.
Pros and Cons of Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″
Pros
- Exceptional height adjustment range: The 12-inch drop and 15-inch rise offer unparalleled flexibility for leveling various trailer and tow vehicle combinations.
- Robust construction: Built from heavy-duty steel with a durable powder coat finish, it feels incredibly sturdy and designed for longevity.
- Precise fitment: Engineered for specific Equal-i-zer hitch heads with 1-1/4 inch on-center mounting holes, ensuring a secure and stable connection.
- Wide receiver compatibility: Designed to fit standard 2-inch or 2.5-inch receiver tubes, making it adaptable to most trucks and SUVs.
- Easy to use: Simple bolt-hole adjustments require minimal tools and offer intuitive height configuration.
Cons
- Requires compatible hitch head: This shank is designed to work with specific Equal-i-zer hitch heads, meaning it’s not a universal standalone solution.
- Length can be a factor: While beneficial for adjustment, the 12-inch overall length means it requires a receiver hitch of comparable strength and depth on the tow vehicle.
Who Should Buy Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″?
This shank is an ideal choice for anyone who owns an compatible Equal-i-zer sway control hitch and frequently tows trailers with varying tongue heights. It’s perfect for those who switch between different trailers, or for anyone with a tow vehicle that has a significantly higher or lower receiver than their trailer’s coupler. If you’ve struggled to achieve a level tow and understand the importance of proper hitch height for sway control performance, this product is a game-changer.
However, individuals who don’t use an Equal-i-zer hitch system or only tow trailers that perfectly match their tow vehicle’s receiver height might not need such an extensive adjustment range. It’s also important to ensure your tow vehicle’s hitch receiver is rated appropriately for the combined weight of the hitch and trailer. For those looking to maximize their towing stability and safety, investing in a robust receiver pin and lock set is also highly recommended alongside this shank.
Conclusion on Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″
The Progress MFG 90-02-4725 Equal I Zer Shank 2.5″ 12in Drop / 15″ Rise x 12″ is a thoroughly impressive piece of equipment that directly addresses a common towing challenge. Its robust construction, extensive adjustability, and precise compatibility with relevant Equal-i-zer hitches make it an invaluable component for ensuring a level and stable tow. The $284.99 price point reflects its heavy-duty build quality and the significant engineering that goes into providing such a broad range of adjustment.
For any owner of a compatible Equal-i-zer hitch struggling with hitch height issues, I wholeheartedly recommend this shank. It transforms the towing experience, enhancing both safety and comfort. It’s a worthwhile investment for anyone serious about achieving optimal performance from their sway control towing setup.