Trimax Trailer Hitch Lock UMAX 100 — Fits 1-7/8"–2-5/16" Couplers, Dual-Ratchet Weatherproof Security

The Trimax UMAX 100 is a heavy-duty trailer hitch lock that secures 1-7/8" to 2-5/16" couplers with a dual-ratchet, reinforced-steel design for maximum theft deterrence.

Designed to protect trailers, campers, utility trailers, and equipment haulers, the UMAX 100 combines all-around coverage with a weatherproof lock and a universal fit. Its sealed keyhole and reinforced body resist cutting, drilling, and forced entry, while the one-size-fits-most design simplifies installation across common coupler types. Backed by a limited lifetime warranty, this lock focuses on dependable, long-term security without complicated setup.

How does the UMAX 100 stop common trailer theft methods?

The UMAX 100 uses a dual-ratchet locking system and reinforced steel construction to make common attacks more difficult and time-consuming. By covering the coupler and engaging two locking points, it denies thieves easy access to hitch release points.

• Dual ratchet mechanism increases pry resistance and keeps the lock tightly seated.
• Reinforced steel body resists cutting and impacts better than thin cast locks.
• 360-degree coverage eliminates exposed latch components thieves typically target.
• Sealed keyhole limits corrosion that could otherwise weaken the lock over time.

Will this fit my trailer's coupler size and type?

The UMAX 100 is engineered as a universal solution for the most common coupler sizes, covering 1-7/8" through 2-5/16" diameters and accommodating a variety of coupler shapes. It’s intended for standard ball-type couplers and most aftermarket designs.

• One-size-fits-all design adjusts to common trailer coupler diameters.
• Works with both rounded and slightly oval coupler profiles.
• Suitable for boat trailers, utility trailers, campers, and equipment trailers.
• Easy to check fit before final purchase with manufacturer specs.

How does the UMAX 100 hold up in bad weather and long-term use?

The lock includes a sealed keyhole cover and weatherproof components to keep dirt and moisture from seizing the cylinder, helping maintain reliable operation in wet or salty conditions. Its heavy-duty finish and construction resist rust and wear, and the limited lifetime warranty supports long-term use.

• Sealed keyhole keeps moisture and grit away from the cylinder.
• Durable coating and reinforced steel slow corrosion and surface wear.
• Mechanism designed for repeated engagement without looseness.
• Limited lifetime warranty provides added confidence in longevity.

How easy is the Trimax UMAX 100 to install and remove during regular use?

Installation is straightforward—position the lock over the coupler and engage the dual ratchets until they click into place. Removing the lock requires the matching key and reversing the ratchet engagement; the design balances security with day-to-day usability.

• Quick-fit design installs without tools in most cases.
• Dual ratchets secure the unit tightly but release cleanly with the key.
• Compact enough to store in a vehicle when not in use.
• Clear visual fit helps confirm correct installation at a glance.

Who is this for? The Trimax UMAX 100 is aimed at trailer owners who need robust, no-fuss protection—boat owners, weekend campers, landscapers, and any small-business operator who hauls gear. If you want a high-strength lock that covers the coupler, works across common sizes, and stands up to weather and abuse while remaining simple to use, the UMAX 100 is built for that purpose.