---
product_id: 220675926
title: "Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8\" - 2-5/16\" Couplers, All Coupler Types"
brand: "trimax"
price: "$U5836"
currency: UYU
in_stock: true
reviews_count: 13
category: "Trimax"
url: https://www.desertcart.uy/products/220675926-trimax-umax-50d-trailer-lock-for-hitch-dual-purpose-transforms
store_origin: UY
region: Uruguay
---

# Dual ratchet locking system Weather-resistant keyhole cover 360° tamper-resistant coverage Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types

**Brand:** trimax
**Price:** $U5836
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock it down, level up your trailer security game!

## Quick Answers

- **What is this?** Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types by trimax
- **How much does it cost?** $U5836 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/220675926-trimax-umax-50d-trailer-lock-for-hitch-dual-purpose-transforms)

## Best For

- trimax enthusiasts

## Why This Product

- Trusted trimax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile 2-in-1 Design:** Transforms effortlessly from coupler lock to U-lock for all your security needs.
- • **360° Anti-Tamper Shield:** Full coverage guards against prying, hammering, and unauthorized access.
- • **Weatherproof Reliability:** Integrated keyhole cover keeps dirt and corrosion out, ensuring smooth use rain or shine.
- • **Unmatched Dual Ratchet Security:** Advanced locking mechanism for maximum trailer protection.
- • **Universal Fit with Lifetime Assurance:** Fits all common coupler sizes and backed by a limited lifetime warranty for peace of mind.

## Overview

The Trimax UMAX 50D Trailer Lock offers a robust dual ratchet locking system with 360-degree tamper protection, adaptable as both a coupler and U-lock. Designed for 1-7/8" to 2-5/16" couplers, it features a weather-resistant keyhole and universal fit, backed by a limited lifetime warranty—perfect for professionals who demand reliable, versatile trailer security.

## Description

Buy Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types: Hitch Locks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Should be very sturdy to protect tow dolly - I have a lightweight tow dolly for pulling a slingshot. Once we get to destination, car and tow dolly stay in parking lot. Dolly is not very heavy, and I wanted to secure the tongue from nefarious actors. This fits the coupler very tightly, and combined with a chain thru the wheels to prevent dragging, my dolly should be secure. Unit appears strong. And I like the circular style keyway. Came quickly at a great price. Happy camper so far.
Review: Pretty good as a mechanical lock. - works as i should. Used on a bulldog hitch. Latches on both sides. Will only slow down a person with a battery operated grinder though.

## Features

- DUAL RATCHET SECURITY – Advanced dual ratchet locking system ensures a strong, tamper-resistant fit for maximum trailer protection
- MULTI-USE DESIGN – Functions as both a coupler lock and a U-lock, providing versatility and convenience for securing your trailer or other equipment
- 360° PROTECTION – Designed with full 360-degree coverage to guard against prying, hammering, and tampering, keeping your trailer safe
- WEATHER-RESISTANT KEYHOLE – Integrated keyhole cover keeps dirt, debris, and corrosion at bay, ensuring smooth operation in all conditions
- UNIVERSAL FIT & WARRANTY – Compatible with most coupler sizes and backed by a limited lifetime warranty for long-term security and peace of mind

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084ZW5BNZ |
| Batteries | 1 Unknown batteries required. |
| Best Sellers Rank | #57,187 in Automotive ( See Top 100 in Automotive ) #112 in Towing Hitch Locks |
| Brand | Trimax |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,192) |
| Date First Available | February 19, 2020 |
| Exterior | Chrome |
| Item Weight | 3.2 pounds |
| Item model number | UMAX50D |
| Manufacturer | Trimax |
| Manufacturer Part Number | UMAX50D |
| Model | UMAX50D |
| Product Dimensions | 9.75 x 9.25 x 4 inches |

## Images

![Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types - Image 1](https://m.media-amazon.com/images/I/71-QyR0wkIL.jpg)
![Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types - Image 2](https://m.media-amazon.com/images/I/71jJ3AbWWoL.jpg)
![Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types - Image 3](https://m.media-amazon.com/images/I/81X9gevvYuL.jpg)
![Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types - Image 4](https://m.media-amazon.com/images/I/81mtR+V0JDL.jpg)
![Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types - Image 5](https://m.media-amazon.com/images/I/81nEGTUMLML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Should be very sturdy to protect tow dolly
*by M***R on March 27, 2023*

I have a lightweight tow dolly for pulling a slingshot. Once we get to destination, car and tow dolly stay in parking lot. Dolly is not very heavy, and I wanted to secure the tongue from nefarious actors. This fits the coupler very tightly, and combined with a chain thru the wheels to prevent dragging, my dolly should be secure. Unit appears strong. And I like the circular style keyway. Came quickly at a great price. Happy camper so far.

### ⭐⭐⭐⭐⭐ Pretty good as a mechanical lock.
*by S***R on June 11, 2025*

works as i should. Used on a bulldog hitch. Latches on both sides. Will only slow down a person with a battery operated grinder though.

### ⭐⭐⭐⭐⭐ Heavy duty lock
*by A***R on September 29, 2025*

Very solid lock. Easy to install. Heavy weight and rugged.

## Frequently Bought Together

- TRIMAX UMAX50D Universal Dual Purpose Trailer Coupler and U-Lock
- Maxxhaul 70472 Solid Rubber Heavy Duty Black Wheel Chock 2-Pack, 8" X 4" X 6"

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-01-31*