---
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: "€ 129.63"
currency: EUR
in_stock: true
reviews_count: 13
category: "Trimax"
url: https://www.desertcart.de/products/220675926-trimax-umax-50d-trailer-lock-for-hitch-dual-purpose-transforms
store_origin: DE
region: Germany
---

# Dual ratchet locking system Weather-resistant keyhole cover 360° tamper protection 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:** € 129.63
**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?** € 129.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/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

- • **Weatherproof Reliability:** Keyhole cover blocks dirt and corrosion for smooth use in any climate
- • **360° Armor Against Theft:** Full coverage guards against prying, hammering, and tampering
- • **Versatile Dual-Use Design:** Transforms effortlessly from coupler lock to U-lock
- • **Unbreakable Dual Ratchet Security:** Advanced locking tech for maximum trailer defense
- • **Universal Fit with Lifetime Peace of Mind:** Fits all common coupler sizes and backed by a limited lifetime warranty

## Overview

The Trimax UMAX 50D is a robust, dual-purpose trailer lock featuring an advanced dual ratchet system and 360-degree tamper protection. Designed to fit 1-7/8" to 2-5/16" couplers, it converts easily into a U-lock for versatile security. Its weather-resistant keyhole ensures durability in all conditions, while a limited lifetime warranty guarantees long-term peace of mind for your valuable trailer.

## 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: Quality secure trailer theft protection - I did a ton of research for a trailer lock for a boat trailer. I settled on this one and there are zero regrets. This thing is tough, heavy metal and a solid well designed product. Forget the others, the reviews on this one are great because this really is. Easy to use, provides two keys, looks great and does what it should. Easy to set and remove. Couldn’t be more happy!

## 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 | #113,459 in Automotive ( See Top 100 in Automotive ) #182 in Towing Hitch Locks |
| Brand | Trimax |
| Customer Reviews | 4.6 4.6 out of 5 stars (943) |
| Date First Available | February 19, 2020 |
| Exterior | Chrome |
| Item Weight | 3.6 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.

### ⭐⭐⭐⭐⭐ Quality secure trailer theft protection
*by B***E on September 25, 2021*

I did a ton of research for a trailer lock for a boat trailer. I settled on this one and there are zero regrets. This thing is tough, heavy metal and a solid well designed product. Forget the others, the reviews on this one are great because this really is. Easy to use, provides two keys, looks great and does what it should. Easy to set and remove. Couldn’t be more happy!

### ⭐⭐⭐⭐⭐ 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"

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.de/products/220675926-trimax-umax-50d-trailer-lock-for-hitch-dual-purpose-transforms](https://www.desertcart.de/products/220675926-trimax-umax-50d-trailer-lock-for-hitch-dual-purpose-transforms)

---

*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-01*