How to choose a drop hitch by trailer weight and height
Pick a drop hitch in three steps. First, match the receiver size to your truck. Second, choose a rated capacity at or above the loaded trailer weight. Third, set the ball height by subtracting the height from the middle of your truck receiver down to the ground, and subtracting 14 inches from that number. That number determines which drop height is proper for your truck. GEN-Y drop hitches are rated from 5,000 to 32,000 pounds.
Match the hitch to the loaded trailer weight
Start with the loaded trailer weight, not the empty weight. The truck, receiver, hitch, ball, and coupler each carry a rating, and the lowest rated part sets the real limit. Leave margin above the loaded weight so cargo added later does not push the setup past its rating. Rated capacity is listed in pounds, which is where names like 10K, 16K, 21K, and 32K come from.
| Model | Rated towing capacity | Receiver and shank | Drop or rise range | Ride feel |
|---|---|---|---|---|
| PHANTOM 5K | 5,000 lbs, 500 lbs tongue weight | 2 inch | 4.5 inch, 3 positions | Standard |
| GLYDER 7K | 7,000 lbs | 2 inch | 2 inch or 6 inch drop, not for rise | Torsion-Flex |
| PHANTOM-X 10K | 10,000 lbs | 2 inch | 2.5 to 4.5 inch | Standard |
| PHANTOM-XT 10K | 10,000 lbs | 2 inch | Adjustable stacked tube, see product page | Torsion-Flex |
| MEGA-DUTY 10K | 10,000 lbs, 1,500 lbs tongue weight | 2 inch | 5 to 22.5 inch, drop or rise | Standard |
| BOSS 10K | 10,000 lbs | 2 or 2.5 inch | 5 to 10 inch | Torsion-Flex |
| PHANTOM-X 16K | 16,000 lbs | 2.5 inch | 2.5 to 10 inch | Standard |
| MEGA-DUTY 16K | 16,000 lbs | 2 inch | 5 to 17.5 inch | Standard |
| BOSS 16K | 16,000 lbs | 2 or 2.5 inch | 5 to 17.5 inch | Torsion-Flex |
| MEGA-DUTY 21K | 21,000 lbs | 2.5 inch | 6 to 18 inch | Standard |
| BOSS 21K | 21,000 lbs, 2,400 lbs tongue weight | 2.5 or 3 inch | 6 to 21 inch | Torsion-Flex |
| MEGA-DUTY 32K | 32,000 lbs with a 3/4 inch pin, 3,500 lbs tongue weight | 2.5 or 3 inch | 6 to 12 inch | Standard |
| BOSS 32K | 32,000 lbs with a 3/4 inch pin, 3,500 lbs tongue weight | 2.5 or 3 inch | 6 or 9 inch | Torsion-Flex |
On the 32K models, a 5/8 inch pin derates the hitch to 21,000 pounds, so confirm which pin is in use before loading toward the higher rating.
Match the receiver size to your truck
GEN-Y drop hitches use 2 inch, 2.5 inch, and 3 inch shanks, depending on capacity, and the shank must match the receiver opening on the truck. The 3 inch option on the BOSS 21K and 32K is limited to select Ford trucks built after 2017.
Measure for the right drop
- Park the truck and trailer on level ground, with the trailer loaded to its normal towing weight.
- To choose the hitch, measure from the middle of the receiver to the ground and subtract 14 inches. The nearest GEN-Y drop size is the optimal drop for the truck.
- To set the ball height, measure from the ground to the top of the receiver opening, then from the ground to the bottom of the trailer coupler with the trailer sitting level.
- Subtract the coupler height from the receiver height. The result is the drop or rise needed. A coupler lower than the receiver calls for a drop, and a coupler higher than the receiver calls for a rise.
- Move the ball mount to the matching slot, secure it with the supplied pin, and confirm the trailer sits level.
For example, a 26 inch receiver height and an 18 inch coupler height call for an 8 inch drop.
Check tongue weight before you tow
GMC lists proper tongue weight for ball-mounted trailers at roughly 10% to 15% of the loaded trailer weight. A loaded 6,000 pound trailer, for example, should land between 600 and 900 pounds. Too little can make a trailer prone to swaying, and too much can overload the tow vehicle's rear tires. Each GEN-Y hitch lists its own tongue weight rating, which is a ceiling, not a target.
When a stabilizer kit helps
Longer drops flex more under load because the ball mount extends farther from the receiver. GEN-Y recommends a stabilizer kit on the MEGA-DUTY 10K for drops between 12.5 and 15 inches and includes one automatically above 15 inches. On the MEGA-DUTY 16K, a kit is recommended at a 12.5 inch drop and included above that.
Choose this if
MEGA-DUTY
- You tow several different trailers and want one hitch that adjusts to each.
- You need drop or rise, since the MEGA-DUTY is designed and tested for both.
- Adjustability matters more to you than ride quality.
BOSS
- You want the MEGA-DUTY's adjustable design with Torsion-Flex rubber torsion arms.
- Protecting cargo and giving passengers a smoother ride matters. GEN-Y states the arms transfer about 10% of trailer inertia compared with 100% through a rigid hitch, and owners report up to 90% smoother towing.
PHANTOM and PHANTOM-XT
- You drive a half-ton truck or SUV and tow within 5,000 to 16,000 pounds.
- A shorter drop range covers your trailer height.
- You plan to use GEN-Y attachments only. GEN-Y does not recommend non-GEN-Y attachments, weight distribution, or flat towing with the PHANTOM family.
GLYDER 7K
- You tow a teardrop trailer, small camper, landscape trailer, or boat.
- You want a lightweight Torsion-Flex ball mount rated for 7,000 pounds. GEN-Y does not recommend the GLYDER in the rise position.
Frequently asked questions
What size drop hitch do I need?
Measure from the middle of your receiver to the ground and subtract 14 inches. The nearest GEN-Y drop size is the optimal drop for your truck. Then measure the receiver height and the trailer coupler height with the trailer level and loaded. Receiver height minus coupler height is the drop or rise needed, and it tells you which slot to use on the ball mount.
How do I match a drop hitch to my trailer's weight?
Choose a hitch rated at or above the loaded trailer weight, with room to spare. GEN-Y drop hitches are rated from 5,000 to 32,000 pounds. The lowest rated part in the setup, whether the truck, receiver, hitch, ball, or coupler, sets the real limit. Also check the hitch's tongue weight rating, which is a ceiling, not a target.
Do I need a stabilizer kit?
Longer drops flex more under load, so GEN-Y recommends a stabilizer kit on longer drops and includes one automatically on the longest sizes. The MEGA-DUTY 10K recommends one for drops between 12.5 and 15 inches and includes one above 15 inches. The MEGA-DUTY 16K recommends one at a 12.5 inch drop and includes one above that.
Can I use a drop hitch with weight distribution?
MEGA-DUTY and BOSS hitches work with almost any weight distribution system on the market when paired with the GEN-Y Weight Distribution Shank. GEN-Y does not recommend using the PHANTOM family with weight distribution hitches or with non-GEN-Y attachments.
What is the difference between a drop hitch and a rise hitch?
A drop hitch lowers the ball below the receiver, and a rise hitch raises it above. The MEGA-DUTY line is designed and tested for either position. GEN-Y does not recommend the GLYDER or VOYAGER in the rise position. For flat towing with a MEGA-DUTY, the drop or rise must not exceed 7.5 inches.
Is a Torsion-Flex drop hitch worth it?
GEN-Y states that the BOSS torsion arms transfer about 10% of trailer inertia, compared with 100% through a rigid hitch, and owners report up to 90% smoother towing. The BOSS suits owners who want to protect cargo and give passengers a smoother ride. The MEGA-DUTY fits where adjustability matters most. The BOSS needs a 500 mile break-in, and its rubber components carry a five year warranty.
What ball should I use with a pintle ring trailer?
Use a 2 5/16 inch ball, not a 2 inch ball, when towing a pintle ring trailer with a MEGA-DUTY or BOSS. GEN-Y offers a pintle lock option for lunette rings of 1.5 inches or smaller on the BOSS 21K and 32K.
Ready to shop?
Measure your setup, then shop the Bumper Pull Towing collection or use the dealer finder to locate an authorized dealer near you. You can also browse all adjustable drop hitches or read the Bumper Pull Guide for setup in depth.