New
Arrivals/Restock
30K Lbs GTW Gooseneck to 5th Wheel King Pin Adapter – Fits 4" Round Tube Gooseneck Trailers, Converts for 5th-Wheel Hitch Towing, Heavy Duty Reinforced Rib Design, 5th wheel lube plate included
4.0 (53 items)
Limited Time SaleUntil the end
03
37
51
US$113.99 cheaper than the new price!!
Free shipping for purchases over $99 ( Details )
Free cash-on-delivery fees for purchases over $99
Free cash-on-delivery fees for purchases over $99
See all stores
Please note that the sales price and tax displayed may differ between online and in-store. Also, the product may be out of stock in-store.
Used US$76.00
Product details
| Management number | 211831370 | Release Date | 2026/04/06 | List Price | US$76.00 | Model Number | 211831370 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
- Cost-Saving Compatibility Solution – No need to install a full gooseneck hitch system hitch for your pickup This adapter converts your gooseneck trailer’s 4" round tube to a 2" standard kingpin interface, letting your existing 5th-wheel hitch tow the trailer seamlessly
- Easy Bolt-On Installation – No welding, cutting, or professional modifications required! Replace the original gooseneck ball coupler on your trailer’s 4" round tube with basic hand tools in 15 minutes. Perfect for truck owners who prefer hassle-free at-home upgrades
- Heavy-Duty Load Capacity for Reliable Towing – Built with heavy duty carbon steel, this adapter boasts a 30,000 lbs GTW (Gross Trailer Weight) and 4,500 lbs tongue weight rating. Ideal for hauling heavy cargo, farm equipment, and construction materials without wobbling or failure
- Dual-Towing Flexibility Without Hitch Removal – Keep your pickup’s 5th-wheel hitch intact while gaining the ability to tow gooseneck trailers. Switch between 5th-wheel RVs and gooseneck flatbeds in minutes—no repeated uninstallation/installation, perfect for multi-purpose towing needs.
- Precision Fit for 4" Round Tube Trailers – Engineered with a tight 0.5mm gap tolerance to fit all standard 4" round tube gooseneck trailer frames. Eliminates towing noise and instability at high speeds, ensuring a secure, smooth ride whether on highways or rough off-road terrain
| UPC | 717839221574 |
|---|---|
| Brand Name | FlexHitch |
| Pull Force | 30000 Pounds |
| Manufacturer | FlexHitch |
| Model Number | GC-021R |
| Material Type | Alloy Steel |
| Automotive Fit Type | Universal Fit |
| Included Components | 5th Wheel Lube plate x2, Gooseneck to 5th Wheel King Pin Adapter |
| Manufacturer Part Number | GC-021R |
| Compatible with Vehicle Type | Truck |
| Manufacturer Warranty Description | 6 month |
Bestseller ranking
Coupler Parts
Customers who viewed this product also viewed
Viola
Correction of product information
If you notice any omissions or errors in the product information on this page, please use the correction request form below.
Correction Request Form