If your bike rack sags or your tailgate hits the rack, a trailer hitch extension is the solution. But not all extensions are safe for bike racks. We researched specifications, industry standards (SAE J684), and aggregated owner feedback to find the best options. Our evaluation focuses on weight capacity, anti-rattle design, and overall durability. Here are the top picks.
| Photo | Product | Score | Buy |
|---|---|---|---|
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CURT 45790 Trailer Hitch Extension Best Overall 12-inch length, 2-inch receiver, 3500 lb GTW, 350 lb tongue weight |
9.2 | 🛒 Check Price |
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MaxxHaul 70130 Trailer Hitch Extension Budget Pick 10-inch length, 2-inch receiver, 2000 lb GTW, 200 lb tongue weight |
8.4 | 🛒 Check Price |
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Reese Towpower 7004020 Trailer Hitch Extension Best Anti-Rattle 12-inch length, 2-inch receiver, 3500 lb GTW, 350 lb tongue weight |
8.8 | 🛒 Check Price |
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CURT 45791 Trailer Hitch Extension Long Reach 18-inch length, 2-inch receiver, 3500 lb GTW, 350 lb tongue weight |
8.6 | 🛒 Check Price |
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U-Haul Trailer Hitch Extension 2 inch Simple & Solid 6-inch length, 2-inch receiver, 2000 lb GTW, 200 lb tongue weight |
7.8 | 🛒 Check Price |
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CURT 45792 Trailer Hitch Extension Adjustable Length Adjustable 8 to 12 inches, 2-inch receiver, 3500 lb GTW, 350 lb tongue weight |
8.1 | 🛒 Check Price |
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Tekonsha 90195 Trailer Hitch Extension Compact & Corrosion Resistant 8-inch length, 2-inch receiver, 2000 lb GTW, 200 lb tongue weight |
7.3 | 🛒 Check Price |
1. CURT 45790 Trailer Hitch Extension: Best Overall
The CURT 45790 is a well-engineered extension that excels in stability. Its anti-rattle plate tightens the connection, minimizing wobble common with extensions. Owner feedback highlights its solid build and easy installation. We compared it against others and found its powder coating holds up well over time.
However, because any extension increases leverage, it reduces the effective tongue weight capacity. For very heavy racks (over 50 lbs), consider a shorter extension or a rack with its own support. This is best for standard 2-bike racks.
- Powder-coated carbon steel resists rust and corrosion
- Anti-rattle design with integrated stabilizer plate
- Meets SAE J684 safety standards for towing
Pros: Rock-solid anti-rattle system; High weight capacity for most bike racks
Cons: May add excessive leverage on heavy racks
2. MaxxHaul 70130 Trailer Hitch Extension: Budget Pick
The MaxxHaul 70130 is a budget-friendly option that gets the job done for light loads. We researched owner feedback and found it works well for small bike racks or cargo carriers. Its compact 10-inch length reduces leverage issues.
However, the lack of anti-rattle means you may need an aftermarket stabilizer. It’s not ideal for heavy mountain bike racks. If you can tolerate some play, this is a good value.
- Solid steel construction with black powder coat
- Includes hitch pin and clip
- Lightweight at under 5 lbs
Pros: Very affordable for the quality; Simple, no-fuss design
Cons: No anti-rattle feature, some wobble reported; Lower tongue weight limit
3. Reese Towpower 7004020 Trailer Hitch Extension: Best Anti-Rattle
The Reese Towpower 7004020 uses dual bolts to clamp the extension inside the receiver, drastically reducing movement. Based on owner feedback, this design is highly effective. We compared it to CURT’s plate system and found both work well, but Reese’s bolts are easier to adjust.
One downside: the bolts can loosen over time if not checked. For those who want a rock-solid connection without a separate stabilizer, this is a top choice.
- Dual anti-rattle bolts for a tight fit
- Heavy-duty steel with corrosion-resistant finish
- Compatible with most 2-inch bike racks
Pros: Excellent wobble elimination; Easy to install with included hardware
Cons: Bolts may require periodic tightening
4. CURT 45791 Trailer Hitch Extension: Long Reach
The CURT 45791 offers an extra 6 inches of reach, ideal for trucks with deep tailgates or campers. Our research shows it maintains the same build quality as the 45790. Owner feedback is positive for those needing the extra length.
However, the 18-inch lever arm significantly reduces the safe tongue weight. Do not use with heavy racks (over 40 lbs). It’s best for light bike racks or when you absolutely need the clearance.
- Extra long for clearance behind tailgates
- Same anti-rattle plate as 45790
- Class 3 rated, meets SAE J684
Pros: Provides maximum clearance; Sturdy build with anti-rattle
Cons: Long length reduces effective tongue weight; Heavier and more leverage on hitch
5. U-Haul Trailer Hitch Extension 2 inch: Simple & Solid
U-Haul’s extension is a no-nonsense, short adapter that works well for small racks. We researched its specs and found it’s best for light duty. Owner feedback appreciates its simplicity and low price.
However, the lack of anti-rattle and the short length limit its versatility. If you need just a few inches to clear a spare tire, this works. For larger racks, look elsewhere.
- Short 6-inch design minimizes leverage
- All-steel construction with black finish
- Includes hitch pin
Pros: Compact and strong; Very affordable
Cons: No anti-rattle, some play reported; Short length may not clear some tailgates
6. CURT 45792 Trailer Hitch Extension: Adjustable Length
The CURT 45792 is unique with its adjustable length, letting you fine-tune clearance. We compared it to fixed extensions and found it convenient for multiple vehicles. Owner feedback is mixed: some love the flexibility, others find it less stable than fixed models.
The added complexity means more parts to check. For those who need occasional length changes, it’s a good choice. But if you only need one length, a fixed extension is simpler and more reliable.
- Sliding design with locking pin for length adjustment
- Anti-rattle stabilizer integrated
- Heavy-duty carbon steel
Pros: Adaptable length options; Solid anti-rattle mechanism
Cons: Heavier and bulkier than fixed extensions; Adjustment mechanism can loosen over time
7. Tekonsha 90195 Trailer Hitch Extension: Compact & Corrosion Resistant
The Tekonsha 90195 is a basic extension with a focus on corrosion resistance. We researched its zinc coating and found it holds up well in salt-belt winters. Owner feedback is average: it works for light racks but can be noisy.
Its low tongue weight limit and lack of anti-rattle make it unsuitable for heavy or premium bike racks. If you have a light rack and need corrosion protection, consider it. Otherwise, spend a bit more for a better option.
- Zinc-plated finish for corrosion resistance
- Compact design for tight spaces
- Includes hitch pin
Pros: Good rust prevention; Lightweight and easy to handle
Cons: Lower weight capacity; No anti-rattle, some wobble
Frequently Asked Questions
Is it safe to use a hitch extension for a bike rack?
Yes, if you follow the manufacturer’s weight limits. Extensions increase leverage, reducing the effective tongue weight capacity. Always stay within the extension’s rated GTW and tongue weight, and never exceed your vehicle’s hitch rating.
How much does a hitch extension affect tongue weight capacity?
Generally, each additional inch of extension reduces the effective tongue weight by about 10-20% from the original rating. For example, a 12-inch extension on a 500 lb tongue weight hitch may only be safe for 350-400 lbs. Check the extension’s specs.
Will a hitch extension cause my bike rack to wobble?
It can. Extensions add a leverage point, increasing potential for movement. Look for models with anti-rattle features like bolts or stabilizer plates. Some owners also use aftermarket anti-rattle clamps.
What length hitch extension do I need for my bike rack?
Measure the distance from your hitch receiver to the nearest obstruction (tailgate, spare tire). Add a few inches for clearance. Common lengths are 6, 8, 10, 12, and 18 inches. Use the shortest length that works.
Can I use a 2-inch hitch extension with a 1.25-inch bike rack?
No, the extension must match the receiver size. If your vehicle has a 2-inch receiver and your rack has a 1.25-inch shank, you need a reducer sleeve, not just an extension. Some extensions come with reducers, but it’s best to match sizes.
Our Verdict
For most users, the CURT 45790 is the best overall due to its anti-rattle design and solid build. If you need extra length, the CURT 45791 is a good runner-up, but be mindful of weight limits. For a budget option, the MaxxHaul 70130 works, but expect some wobble.
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