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Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long

Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long

Item # RP45018
Our Price: $523.44
You Save: $216.12
Hitch Adapters
Shipping Weight: 56 lbs
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Extend your trailer hitch receiver opening by 41" or 48" so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer has extra clearance in sharp turns. Reduces hitch from 2-1/2" to 2". 1-800-940-8924 to order Reese hitch adapters part number RP45018 or order online at Free expert support on all Reese products. Great prices and Fastest Shipping for Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long. Hitch Adapters reviews from real customers.
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  • Reviews (100)
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Reese Hitch Adapters - RP45018

  • Hitch Extender
  • Hitch Reducer
  • Fits 2-1/2 Inch Hitch
  • 41 - 48 In Extension
  • 2-1/2 Inch to 2 Inch
  • 5000 lbs
  • Bike Racks
  • Cargo Carriers
  • Hitch Mounted Accessories
  • Trailers
  • Reese

Extend your trailer hitch receiver opening by 41" or 48" so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer has extra clearance in sharp turns. Reduces hitch from 2-1/2" to 2".


  • Hitch extender extends trailer hitch receiver opening from the rear of your vehicle to avoid obstacles
    • Get extra clearance for your trailer
    • Clear your slide-out camper with an extended overhang
    • Mount your bike rack without having to remove your rear-mounted spare tire
  • Steel construction with black powder coat finish
  • Designed to extend the receiver opening 41" or 48" away from the truck
    • Delivered at the full 48" length, can be cut down to the optional 41" length receiver pin hole
  • Ideal for slide-out campers with extended overhangs
  • For use with 2-1/2" x 2-1/2" trailer hitch receivers only
    • Extender reduces the receiver opening to 2" x 2" for use with standard ball mounts and accessories
  • Limited 1-year warranty


  • Application: 2-1/2" x 2-1/2" trailer hitch receivers
  • Maximum gross trailer weight :
    • 4,000 lbs at 48"
    • 5,000 lbs at 41"
  • Maximum GTW when used with weight distribution:
    • 6,000 lbs at 48"
    • 7,500 lbs at 41"
  • Maximum tongue weight :
    • 400 lbs at 48"
    • 500 lbs at 41"
  • Maximum TW when used with weight distribution:
    • 600 lbs at 48"
    • 750 lbs at 41"

Note: This product may not work on some OEM Class V hitches with rounded edges.

Hitch box extension comes complete at 48" and is designed to be cut down to 41" depending on the application.

45018 Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long

Customer Satisfaction Score:

Customer Reviews

Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long - RP45018

Average Customer Rating:  4.7 out of 5 stars   (100 Customer Reviews)

Extend your trailer hitch receiver opening by 41" or 48" so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer has extra clearance in sharp turns. Reduces hitch from 2-1/2" to 2".


Not sure what other people are talking about but the holes all lined up perfectly and the 48” tube steel fit perfectly with very little movement. That can be remedied with a simple hitch clamp but I don’t think I need it. Very solid with some weight to it. Adding the wire extension the holes also in perfect alignment. I chose to order direct from the website, I feel I will get the best product and customer service. Expensive but much needed to haul my trailer with truck camper. Always great stuff from etrailer.


Item was damaged upon arrival. That was probably done in shipping. Other than the damage it is a very well built hitch.

Etrailer Expert

Jenny N.


I will have our Customer Service team reach out to you. You can touch it up with a rust resistant spray paint like Rustoleum.


I purchased the hitch extension to accomendate our bike rack to go on the back of our truckcamper. I also purchased the bike rack and steps at all work perfectly together. The extension is very heavy duty and can be used for towing a boat. The only con was not the extension it was the packageing it beat itself up. I also added turnbuckles and safety chain and electrical extension.


I've bought Reese products in the past with no problems but this time one of the pin holes wasn't drilled completely through. It kinda makes one worry about quality control. These hitch extenders carry a lot of weight and if the quality doesn't match the demand it can be very dangerous. This is not a cheap product so I expected higher quality.
Also, the hitch hole cover was broken, not a big deal but the hitch was just thrown into a box with no packaging material and sent on its merry way. When the box arrived it was obvious the box had see some tough times in it's journey to it's new home. I know this is a heavy unit but it looked like everybody along the way hated it!
I've ordered a number of items from etrailer and they have been quick, responsive to questions and priced well, so this isn't a bad mark on their efforts.


I ordered this from etrailer and it was fast and simple. I got it within days. I think this will work well with my pickup camper and trailer combo. The only problem I had was that there was too much paint on it. So much so that it would not fit into my receiver. I am sure they are mass produced, but they should have someone put a micrometer on them once in awhile. I have a 2018 Ram 3500 with a 2 1/2 inch receiver. I tried a friends exact same extension and it slid in easily. Oh, well. I made it work anyways.


I would love to give this a high review BUT-the silver "Reese" cover was destroyed in shipment-not Reeses fault, but the following is 1) the mounting plate for the 7-pin connector was welded on poorly, the weld itself was strong but so poorly done that the mounting plate on the 7 pin extension cord mounting bracket would not mount flush nor would the bolt holes line up-I had to leave one of the 4 bolts out. 2) the cover ring at the reiver end, where you install your ball hitch was also so poorly welded, off center in all 4 directions. So bad that it would not take some ball hitches and others had to be "forced fit" to get them in because the welded cover plate actually closed off the receiver end by about a 1/16 of an inch, doesn't seem like much but on a receiver that has to fit snuggly it's a mile. 3) the distance from the pin hole at trucks end to end of extension was too long-it hit spare tire and I had to cut off 1 1/4 inches to get the extension to fit and not hit the spare tire. Other than those 3 things it had potential.

Etrailer Expert

Katrina B.


Thank you for your feedback! I have forwarded this information over to our customer service department to better assist you.


Just received the 41/48 inch hitch extension today so haven’t actually used it. However, one can tell the high quality by looking at the welds and thick paint coating. This item is extremely heavy. I expected some weight to it, but it surprised me. Also, the tubing has very tight tolerances. I have two ball mounts, neither of which slid into the extension on their own. I had to pound them in and tap them out with a 3 pound hammer. Once paint and labels were scraped away by this action the ball mounts were able to be slid in by hand. This extension will be used on my dually carrying my truck camper. I’ll be towing an aluminum trailer with a Can Am Spyder. Total weight towed will be less than 2000 pounds so I don’t expect the extension to be subjected to any stress.


The extension is very heavy duty. Emphasis on heavy. Well built, delivery was very quick.


Works as described.


Product was slightly damaged on arrival. The box looked like it had been around the world. Damage isn’t sufficient to warrant a replacement but I will need to work on the bracket for the electrical plug. Otherwise the product is VERY heavy duty and likely is twice as strong as the comparable extension from Curt


Extension is very heavily built. Had a little trouble getting it in the hitch on my 2019 F-350. Hoping it was due to new paint and the cold weather making the hitch slightly smaller.


The extension is heavy duty with a smaller square tube inside the outside one. The bracket to attach the 7 pin electrical connector was bent and I had to cut 1 1/2" off the end to make it work because it hit the spare tire of my 2017 RAM 2500.


Great product.Used it for a long road trip this past weekend. Worked great. No issues.


Works extremely well. Able to tow my jeep behind my RV 350 super duty and camper 1165 eagle cap also a enclosed single axle trailer, with no issues. thanks


Product was shipped promptly and in excellent condition. All of the information regarding this product was very helpful, especially the video. I was worried that I needed a heavy duty hitch system but after watching the informational video, I was sure this would work for my set up for towing.


The hitch box extension is something I've used for years. The quality of this product is very good.


This thing is a beast!


48" Titan hitch box extension on 2011 F-350 Dually


I am very happy with this item. I use it on my truck
When I travel with my truck camper and want to tow my boat
It fits the factory receiver on my F 350 and works fine for my boat or just to add my bike rack behind the camper. It is a heavy duty unit and I would recommend it for similar uses.


I needed this to connect a cargo basket and or an ATV trailer to the truck with with a truck camper in the bed. The truck campers bumper extends 48 inches out from my truck. This was ideal. Its sturdy and does not bend or sway. Perfect for my application.


The holes for hitch pin did not line up with holes on the receiver of my truck. I had to drill out the extension to make it work.

Etrailer Expert

Sierra K.


To achieve the 41 inch extension you will need to cut this 6 inches behind the pin hole when trimming.


This is very heavy duty. When I installed it on my Ford F350 the end of the extension bar hit the spare tire when it went thru the receiver and the pin hole was about a 1/4 hole off. I had to trim the end about 1" to make it so it would clear the spare tire.

Hitch extension was a bit loose in the receiver which is typical and expected. I bought a hitch clamp to take care of the play and everything works fine.

Philip B.


After a year the hitch extension is still working great. As I said before I added a hitch clamp as the extension was loose in receiver - without this the trailer would be bouncing up and down a lot. It is a solid piece of metal and weighs quite a bit. I am only pulling a drift boat so this hitch extension works great because the trailerboat weight is less than 800 lbs. There is a limit to tongue weight for this extension so be aware of this and know what your actual trailer weights are. Overall I am very happy.


I give this 5 stars for its robust design and functionality. It was not an easy install though. The 5/8" pin hole on my hitch did not line up very well with the pin hole on this hitch extension. In all fairness, it could have been my hitch, although other extenders I tried did line up...We use this to tow a 4000 lb jeep behind a truck camper with a 2016 Ram 3500 dually.



This hitch extension is still working great. We have used it to tow our jeep over 25,000 miles with no problems.


Very robust. I cut it to the length I needed and fit perfect. Received product within 3 days of ordering. I have felt with e trailer before and always with outstanding results. Thanks e trailer



After 1 year the Reese hitch adapter is working flawlessly. 100 satisfied.


heavy duty, works well pulling a small enclosed trailer behind my slide in camper. like others, I did have to grind a little to get it to fit but not a big deal....

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