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Sling Lift Trailers

Conolift now offers an exciting yet affordable alternative to a fixed width straddle carrier. Conolift’s sling lift trailers combine the ease of handling boats with slings, with our unique expanding width frame to reduce the wasted space between stored boats that comes with fixed width lifts. The forward sling position can be hydraulically adjusted fore and aft up to six feet to allow the slings to always be placed under the recommended lift points on the boat. This trailer can also be used on your existing launch ramp, eliminating the need for the construction of costly piers or lift wells.

Unlike a conventional hydraulic trailer, the sling trailer is also capable of lifting sailboats directly out of, or into cradles, but works equally efficiently with boat stands. Each model is available as a towable unit, or if more maneuverability is required, as a completely self-propelled unit. Conolift quality is built into each unit with standard stainless steel pins and hardware, high strength hydraulic cylinder shafts, pilot operated safety lock valves on all lifts, and robust vertical cushions to protect the boat sides and rub rails. The hydraulic system is powered by a Honda engine, eliminating the need for electrical connections or untimely battery power loss.

Optional Equipment:

  • Self-propelled power unit
  • HDG frame
  • Wireless remote control
  • Custom paint colours

Conolift Marine Hydraulic Sling Lift Trailers
















10,000 LBS


 108" - 162"

77" - 131"


 19' 8 "

 30' 2"

 Up to 32'

Up to 33'


20,000 LBS


 108" - 162"

77" - 131"


 19' 8 "

 30' 2"

 Up to 37'

Up to 38'


30,000 LBS 


115" - 169"

 84" - 138"


21' 3"


 Up to 42'

Up to 44'


40,000 LBS


 120" - 174"

 89" - 143"


25' 5 "


 Up to 46'

Up to 48'


60,000 LBS


 138" - 198"





 Up to 50'

Up to 52'



Conolift marine hydraulic trailers feature a unique wide, open-frame concept, delivering the most user-friendly trailer operation on the market today. Our trailers provide superior inside clearance, allowing vessels to be safely carried and set with very low ground clearance when necessary. Setting keel blocks and boat stands is also easier with the improved accessability of a Conolift hydraulic trailer.

Most Conolift models are equipped with our exclusive hydraulic expanding-width frames, allowing an expanded inside clearance of 98" (even more on large models). This allows the trailers to straddle and haul sailboats resting on large cradles. When combined with our optional hydraulic sail arm package, our open-frame system enables the trailer to safely handle non-cradled sailboats with all types of keels, including wing keel designs.

This clean, open-frame system and wide inside width also enables Conolift operators to transport vessels backwards when required.

Not only are our trailers constructed with a wide, open-frame design; we also strive to deliver uncomplicated operation and clean, uncluttered lines. Most of our hydraulic components are mounted within the actual frame of the trailer, eliminating exposed hoses, cylinders, and fittings in the working areas.

Conolift operators insist that our clean, open-frame design offers the most efficient boat handling solution for every application. Ease of operation, simple functionality, and efficiency in handling are the hallmarks of our trailers.

Take a minute to review the photos below to see the benefits of the Conolift clean, open-frame design concept.


When it comes to the ultimate in functionality, versatility, and performance, Conolift delivers! Our exclusive hydraulic expanding-width frame allows variable-width inside frame clearance, providing a customized fit for every vessel. This unique system provides easy expansion and retraction of the main trailer side-frames, delivering adjustment of 30" or more. This system, combined with our clean, open-frame design allows trailers to transport sailboats resting on cradles.

Highway trailers equipped with this system are designed to expand for safe transportation of large, wide-load vessels, with the keel carried as low to the ground as possible for maximum overhead clearance.

This increased frame width also provides superior stability when transporting wide-beam vessels. When transporting the trailer empty, or with smaller vessels, the frames can be quickly retracted to allow for legal-width operation. This hydraulic expanding-width frame design is a proven system, with units in continuous service since 1985.

For the ultimate in boat-handling efficiency, ease of operation, and simple functionality, give Conolift a call. But don't just take our word for it! Ask for a list of references, and take the time to contact our clients to find out for yourself how Conolift can benefit your operation.

For more details on our exclusive hydraulic expanding-width frame system, review the pictures below.

  • Kropf Conolift Marine Hydraulic Sling LIft Trailer Expanding Frame Design
  • Kropf Conolift Marine Hydraulic Sling LIft Trailer Expanding Frame Design


Whether your crew has years of boat-handling experience, or if they are rather new to the industry - - Conolift makes it easier! When it comes to simple functionality, ease of operation, and efficient boat-handling, there is no alternative!

Conolift's exclusive extended frame lift system, with our frame-mounted adjustable lifting pads, allows safe and easy one man trailer operation. Our trailers operate similar to a large fork truck, with the side frames of the trailer serving as the "forks" for lifting your vessels.

Our clean, open-frame design and hydraulic expanding-width frame allows even greater flexibility particularly when working with wide beam vessels.

For gunnel to gunnel indoor or outdoor storage, Conolift provides the solution. With our trailers, there is no need to leave room between vessels for handling slug beams or long keel bars, so true "rail to rail" positioning is made possible.

Our hydraulic rear winch strap also eliminates the need for a fixed end-gate or rear torsion bar, allowing for fast and efficient haul-out and blocking.

For greater efficiency, many clients choose our optional wireless radio remote control system for all hydraulic functions. This system provides added convenience, efficiency, and safety, without eliminating the manual control system as a back-up.

For the ultimate in efficiency and ease of operation, please contact us, or perhaps one of our clients in your area. They will assure you that Conolift out-performs the competition, providing superior boat-handling safety and efficiency for all operations.

Please feel free to browse the pictures below for more details.