--- title: "trailer lock — Niche Verdict: Launch it (68/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/trailer-lock" last_updated: "2026-07-10T00:46:57.269Z" locale: en meta: description: "trailer lock clears our launch bar: a $6.1M/yr market growing +172.1% with returns at 3.3%." "og:description": "trailer lock clears our launch bar: a $6.1M/yr market growing +172.1% with returns at 3.3%." "og:title": "trailer lock — Niche Verdict: Launch it (68/100) | Amazon United States - Flapen" --- Back to Flapen home # **trailer lock** **Launch it****68/100 ** trailer lock clears our launch bar: a $6.1M/yr market growing +172.1% with returns at 3.3%. **Market/yr** **$6.1M** **Growth (1y)** **+172.1%** **Products** **41** **Brands** **20** was 18 a year ago **Sellers** **127** **Price range** **$7.81–$270.72** **Returns** **3.3%** **Rating** **4.5★** **Launch it** Scored 68/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **68** ×0.30 Growth **73** ×0.30 Competition **74** ×0.20 Quality gap **35** ×0.10 Returns **73** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +172.1% year over year. 58K29KSpike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND No pronounced peak months · busiest ÷ quietest = 1.8× ## **Competition** - RETRUE26% - Rhino USA19% - Master Lock19% - METOWARE11% - JUSTTOP4% - CZC AUTO4% - Other (14 brands)16% Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen. 20 brands and 127 sellers compete here. **Brands** **20 **▲rising was 18 a year ago **Sellers** **127** **Top 5 brand share** **80%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Master Lock Black Universal Size Trailer Hitch Lock Trailer Coupler Lock for Securing RVs Horse Trailers Tool Trailers and More 379ATPY](https://m.media-amazon.com/images/I/41AFmKkBkuL.jpg) [**Master Lock Black Universal Size Trailer Hitch Lock Trailer Coupler Lock for Securing RVs Horse Trailers Tool Trailers and More 379ATPY**](https://www.amazon.com/dp/B000L9QRE8) Master Lock$36.934.6★5,9479%▼falling 2 ![RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Yellow](https://m.media-amazon.com/images/I/41Bv2etW5uL.jpg) [**RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Yellow**](https://www.amazon.com/dp/B09XQJKJH5) RETRUE$12.834.5★3,6479%—flat 3 ![Rhino USA Trailer Hitch Lock Kit (for 2 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue](https://m.media-amazon.com/images/I/51nXpZiUBDL.jpg) [**Rhino USA Trailer Hitch Lock Kit (for 2 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue**](https://www.amazon.com/dp/B098W45GM2) Rhino USA$53.214.4★2,3288%▲rising 4 ![Rhino USA 2 Trailer Hitch Pin Patented 5/8 Locking Receiver Pin for Class III/IV Hitches Weatherproof Anti-Theft Debris-Protected Tow Truck Ready Black 1PK](https://m.media-amazon.com/images/I/41pZJDPD7eL.jpg) [**Rhino USA 2 Trailer Hitch Pin Patented 5/8 Locking Receiver Pin for Class III/IV Hitches Weatherproof Anti-Theft Debris-Protected Tow Truck Ready Black 1PK**](https://www.amazon.com/dp/B07S425715) Rhino USA$27.134.6★10,2257%—flat 5 ![RETRUE Trailer Tongue Coupler Lock Trailer Hitch Lock Dia 1/4 Inch 3/4 Inch Span for Tow Boat RV Truck Cars Coupler Black](https://m.media-amazon.com/images/I/31Hp3-lzVKL.jpg) [**RETRUE Trailer Tongue Coupler Lock Trailer Hitch Lock Dia 1/4 Inch 3/4 Inch Span for Tow Boat RV Truck Cars Coupler Black**](https://www.amazon.com/dp/B0B286C48R) RETRUE$7.814.5★2,2086%▲rising 6 ![METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8 2 2-5/16 Coupler Yellow](https://m.media-amazon.com/images/I/41VpNKjDwiL.jpg) [**METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8 2 2-5/16 Coupler Yellow**](https://www.amazon.com/dp/B0B4ZH6R7Q) METOWARE$10.064.5★2,3395%—flat 7 ![JUSTTOP Trailer Hitch Receiver Pin Lock 5/8 Dia 3-1/2 Long Pin Trailer Lock for Class III IV 2 and 2-1/2 Receiver Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings for Trailer Truck Car Boat](https://m.media-amazon.com/images/I/41CoBPkthxL.jpg) [**JUSTTOP Trailer Hitch Receiver Pin Lock 5/8 Dia 3-1/2 Long Pin Trailer Lock for Class III IV 2 and 2-1/2 Receiver Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings for Trailer Truck Car Boat**](https://www.amazon.com/dp/B0FH22JFVV) JUSTTOP$10.044.7★5284%▲rising 8 ![Master Lock Trailer Coupler Lock Universal Size Fits 1-7/8 2 and 2-5/16 389DAT](https://m.media-amazon.com/images/I/41tppByFngL.jpg) [**Master Lock Trailer Coupler Lock Universal Size Fits 1-7/8 2 and 2-5/16 389DAT**](https://www.amazon.com/dp/B01MYCT0LG) Master Lock$32.944.7★17,4284%—flat 9 ![RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Bright Yellow Light Weight](https://m.media-amazon.com/images/I/41m-0UM4AuL.jpg) [**RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Bright Yellow Light Weight**](https://www.amazon.com/dp/B0DFCDMW1C) RETRUE$10.544.5★3,6474%▲rising 10 ![METOWARE Universal Trailer Hitch Locks Adjustable Heavy-Duty Trailer Coupler Ball Locks Fit 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers with 2 Keys](https://m.media-amazon.com/images/I/41RnLJ62OcL.jpg) [**METOWARE Universal Trailer Hitch Locks Adjustable Heavy-Duty Trailer Coupler Ball Locks Fit 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers with 2 Keys**](https://www.amazon.com/dp/B0CZ3LWNJJ) METOWARE$34.734.7★4334%▲rising 11 ![RETRUE Heavy-Duty Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Grey & Silver](https://m.media-amazon.com/images/I/31aruVNnGUL.jpg) [**RETRUE Heavy-Duty Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Grey & Silver**](https://www.amazon.com/dp/B09XQB7C7K) RETRUE$35.094.6★9613%—flat 12 ![Trailer Hitch Locks with Keys Universal Size Fit 1-7/8 2-5/16 2 Inch Ball Hitch Coupler Lock Adjustable Heavy Duty Steel Trailer Tongue Lock for Boat Trailers and RV Anti-Theft Hitches Red-1 Pack](https://m.media-amazon.com/images/I/41Dml7pgLvL.jpg) [**Trailer Hitch Locks with Keys Universal Size Fit 1-7/8 2-5/16 2 Inch Ball Hitch Coupler Lock Adjustable Heavy Duty Steel Trailer Tongue Lock for Boat Trailers and RV Anti-Theft Hitches Red-1 Pack**](https://www.amazon.com/dp/B0DHXHS2HW) COOHAME$23.744.5★3683%—flat 13 ![Rhino USA Trailer Hitch Lock Kit (for 2-5/16 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue](https://m.media-amazon.com/images/I/414y+x9+XKL.jpg) [**Rhino USA Trailer Hitch Lock Kit (for 2-5/16 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue**](https://www.amazon.com/dp/B09J9T8NT2) Rhino USA$53.814.4★2,3283%▲rising 14 ![Master Lock Trailer Lock Stainless Steel Adjustable Coupler Latch Lock 2847DAT](https://m.media-amazon.com/images/I/31M7L7SvKpL.jpg) [**Master Lock Trailer Lock Stainless Steel Adjustable Coupler Latch Lock 2847DAT**](https://www.amazon.com/dp/B001B0QBZ6) Master Lock$12.154.5★3,0623%—flat 15 ![CZC AUTO Hitch Receiver Pin Lock Trailer Receiver Lock with 5/8 Pin for Class III IV 2 and 2-1/2 Receiver for Hitch Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat (1 Pack 5/8 inch pin)](https://m.media-amazon.com/images/I/41k7V1lTElL.jpg) [**CZC AUTO Hitch Receiver Pin Lock Trailer Receiver Lock with 5/8 Pin for Class III IV 2 and 2-1/2 Receiver for Hitch Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat (1 Pack 5/8 inch pin)**](https://www.amazon.com/dp/B07M6W71JJ) CZC AUTO$13.784.6★9,1382%▼falling **~~Showing 15 of 41 — show all ~~** ## **Product shelf** All 41 tracked products in this niche. Top sellersNewestTrending [![Master Lock Black Universal Size Trailer Hitch Lock Trailer Coupler Lock for Securing RVs Horse Trailers Tool Trailers and More 379ATPY](https://m.media-amazon.com/images/I/41AFmKkBkuL.jpg)**Master Lock Black Universal Size Trailer Hitch Lock Trailer Coupler Lock for Securing RVs Horse Trailers Tool Trailers and More 379ATPY** Master Lock**$36.93**4.6★5,947 reviews](https://www.amazon.com/dp/B000L9QRE8) [![RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Yellow](https://m.media-amazon.com/images/I/41Bv2etW5uL.jpg)**RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch 2 Inch 2-5/16 Inch Couplers Yellow** RETRUE**$12.83**4.5★3,647 reviews](https://www.amazon.com/dp/B09XQJKJH5) [![Rhino USA Trailer Hitch Lock Kit (for 2 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue](https://m.media-amazon.com/images/I/51nXpZiUBDL.jpg)**Rhino USA Trailer Hitch Lock Kit (for 2 Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV Camper Trailer Boat Caravan - Reinforced Solid Steel Tow Lock for Trailer Tongue** Rhino USA**$53.21**4.4★2,328 reviews](https://www.amazon.com/dp/B098W45GM2) [![Rhino USA 2 Trailer Hitch Pin Patented 5/8 Locking Receiver Pin for Class III/IV Hitches Weatherproof Anti-Theft Debris-Protected Tow Truck Ready Black 1PK](https://m.media-amazon.com/images/I/41pZJDPD7eL.jpg)**Rhino USA 2 Trailer Hitch Pin Patented 5/8 Locking Receiver Pin for Class III/IV Hitches Weatherproof Anti-Theft Debris-Protected Tow Truck Ready Black 1PK** Rhino USA**$27.13**4.6★10,225 reviews](https://www.amazon.com/dp/B07S425715) [![RETRUE Trailer Tongue Coupler Lock Trailer Hitch Lock Dia 1/4 Inch 3/4 Inch Span for Tow Boat RV Truck Cars Coupler Black](https://m.media-amazon.com/images/I/31Hp3-lzVKL.jpg)**RETRUE Trailer Tongue Coupler Lock Trailer Hitch Lock Dia 1/4 Inch 3/4 Inch Span for Tow Boat RV Truck Cars Coupler Black** RETRUE**$7.81**4.5★2,208 reviews](https://www.amazon.com/dp/B0B286C48R) [![METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8 2 2-5/16 Coupler Yellow](https://m.media-amazon.com/images/I/41VpNKjDwiL.jpg)**METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8 2 2-5/16 Coupler Yellow** METOWARE**$10.06**4.5★2,339 reviews](https://www.amazon.com/dp/B0B4ZH6R7Q) [![JUSTTOP Trailer Hitch Receiver Pin Lock 5/8 Dia 3-1/2 Long Pin Trailer Lock for Class III IV 2 and 2-1/2 Receiver Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings for Trailer Truck Car Boat](https://m.media-amazon.com/images/I/41CoBPkthxL.jpg)**JUSTTOP Trailer Hitch Receiver Pin Lock 5/8 Dia 3-1/2 Long Pin Trailer Lock for Class III IV 2 and 2-1/2 Receiver Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings for Trailer Truck Car Boat** JUSTTOP**$10.04**4.7★528 reviews](https://www.amazon.com/dp/B0FH22JFVV) [![Master Lock Trailer Coupler Lock Universal Size Fits 1-7/8 2 and 2-5/16 389DAT](https://m.media-amazon.com/images/I/41tppByFngL.jpg)**Master Lock Trailer Coupler Lock Universal Size Fits 1-7/8 2 and 2-5/16 389DAT** Master Lock**$32.94**4.7★17,428 reviews](https://www.amazon.com/dp/B01MYCT0LG) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Quality-Overall**22% *“Solid quality”* **Size-Overall**13% *“fits as advertised”* **Advertised Vs Actual Product**12% *“As Advertised”* **Value For Money**10% *“less expensive”* **Ease Of Use**8% *“Ease of use”* **Strength**7% *“Solid construction”* **Efficiency**6% *“Works perfectly”* **Assembly/Installation**4% *“Easy to assemble and use”* **Durability**2% *“Easy and durable”* **Design-Overall**2% *“Seems well made”* ### **What buyers complain about ** **Size-Overall**28% *“didn't fit”* **Quality-Overall**12% *“Bad quality”* **Durability**9% *“Unsure about the durability yet”* **Rusts/Corrodes**5% *“Starting to rust”* **Compatibility-Overall**5% *“does not fit my trailer”* **Ease Of Use**3% *“Hard to use”* **Value For Money**3% *“Cheaper version to buy”* **Strength**3% *“Not as strong as I was expecting”* **Functionality-Overall**3% *“Dose not work at all”* **Locking Mechanism**2% *“Only issue I have with the lock is difficult to lock”* #### **Top return reasons**- Size-Overall64% - Compatibility-Overall14% - Advertised Vs Actual Product4% - Mechanism Issues3% - Functionality-Overall3% - Width2% - Value For Money2% - Defective Material/Parts1% - Quality-Overall1% - Locking Mechanism1%