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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: $460.12
You Save: $259.35
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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 (87)
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Reese Hitch Adapters - RP45018

  • Hitch Extender
  • Hitch Reducer
  • Fits 2-1/2 Inch Hitch
  • 41 - 48 In Extension
  • 5000 lbs
  • 2-1/2 Inch to 2 Inch
  • 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   (87 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".


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.

Thank you for your feedback! I have forwarded this information over to our customer service department to better assist you.
-- Etrailer Expert Katrina B - 04/13/2022


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.


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.


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.
Steve - 08/23/2022


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.

To achieve the 41 inch extension you will need to cut this 6 inches behind the pin hole when trimming.
-- Etrailer Expert Sierra K - 06/27/2022


It looks solid and well built. Only 4 stars because chrome end was broken. Poor packaging. Should be wrapped with padding on that end

Oh no! That is definitely not how we want the extender to arrive. I will have our Customer Service team reach out to you to have it replaced.
-- Etrailer Expert Jenny N - 01/05/2023


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.


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.


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.


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.


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....


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.


excellent customer service great park


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.


Works great but added turn buckles on each side to stiff it up more


Just what we needed and all info on it was accurate. Great service and a great price.


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


It works well


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.

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.
Philip B - 08/20/2019


Shipping was amazingly fast, and the extension seems to be of an excellent build quality! The little decorative chromed plastic ring was smashed in transit, but I don't see that as much loss since in Minnesota it would just catch dirt and salt promoting corrosion anyway. I am very happy with this extension and am thrilled with the customer service I received to help with making this happen. Thanks much!


Came quickly and did the trick.


It does everything I want it to do.


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.
Rob - 11/11/2019


The product arrived within 4 days of ordering and in excellent condition. It fits into the hitch I recently ordered with no adjustments necessary.

Still an amazing product and has been used this year on a long trip
Don T - 08/13/2016

Show More Reviews

See what our Experts say about this Reese Hitch Adapters

  • Difference Between Weight Carrying and Weight Distribution Ratings on a Titan Hitch Extender
    The Titan Hitch Box Extension for 2-1/2 inch Trailer Hitches, item # RP45018, has two different ratings because if towed with a weight distribution system (see link) you will be able to tow higher capacities. If the extension is used as a weight carrying hitch, no weight distribution system, then the capacity is not as high. The weight distribution system distributes the weight from the hitch to the vehicle and trailers axles to allow for improved towing performance. I attached an FAQ...
    view full answer...
  • Is it Recommended to Shorten the Length of the Titan Hitch Extension for 2-1/2 inch Trailer Hitches
    Cutting the back of the Titan Hitch Box Extension for 2-1/2 inch Trailer Hitches, item # RP45018, off is not a concern as long as you leave at least 6 inches behind the center of the hitch pin hole, and you do not excessively heat the extension when cutting it off. Any other modification like drilling, grinding or cutting should be avoided.
    view full answer...
  • Can the Titan 2-1/2 Inch Trailer Hitch Box Extension be Used with Weight Distribution
    Think of the end of the Titan hitch extender, # RP45018, as a long trailer hitch receiver. You will put the weight distribution shank in the end of the extension just like you normally would and perform the set up the same on the trailer end. The weight distribution system you choose will be based on the tongue weight of the trailer when loaded and ready to tow plus the weight of the part of the truck bed camper that is behind the rear axle of the truck. However when using the extension...
    view full answer...
  • What is the Tongue Weight Capacity of the Titan Trailer Hitch Box Extension 45018
    Tongue weight capacity would be 10 percent of the gross trailer weight capacity for Titan extension # RP45018. So that would be 500 pounds at 41 inches or 400 pounds at 48 inches. Or when used with weight distribution it would be 750/600 pounds. Yes, they do factor in temporary shock for bumps, dips, and what have you when providing the ratings, just like with hitches. In other words the unit is not going to break from a spike in the tongue weight due to a bump or something else. If the...
    view full answer...
  • Hitch Extension Recommendation for 2014 RAM 3500 Crew Cab with Bigfoot Truck Camper
    Assuming that your 2014 RAM 3500 is equipped with a 2-1/2" factory hitch, using the Titan Hitch Box Extension, # RP45018, will work well for you when towing your snowmobile trailer. As for the extension acting like a lever, this is true for most hitch extenders but the Titan Hitch Box Extension, # RP45018, was specifically designed to be used on vehicles with a truck bed camper. This extension is constructed of heavy duty steel and has been tested at higher weight ratings so you should...
    view full answer...
  • How Long Can The Titan Hitch Box Extender Part # RP45018 Be On My Truck
    The hitch box extender # RP45018 you referenced will extend your receiver opening to a maximum length of 48-inches away from your truck. But is also offers the option of being shortened to 41-inches. If you have the hitch box extender at 41-inches the weight carrying capacity is 5,000 pounds, whereas 48-inches the weight carrying capacity is 4,000 pounds. Note that it only works with 2-1/2 inch trailer hitch receivers. I also added a link with FAQ's for you too.
    view full answer...
  • Hitch Extender For 2 Inch Receiver 2006 Ford F-350
    The longest extender we offer for a 2 inch hitch receiver is the Hitch Extender, part # HE18. This is an 18 inch extender. Using any extenders in a hitch will reduce the towing capacity by 50 percent.
    view full answer...
  • Will Titan Hitch Box Extension # RP45018 Work with 3/4 Ton Diesel Pulling Horse Trailer
    The Titan Hitch Box Extension, # RP45018, that you mentioned is designed for use with a 2-1/2 x 2-1/2 inch receiver (may not work on some OEM Class V hitches with rounded edges) and offers two extension lengths. 41 inches which has a weight carrying capacity of 5000 pounds, 500 pound tongue weight capacity and with a weight distribution system, 7500 / 750 pounds or 48 inches which has a weight carrying capacity of 4000 pounds, 400 pound tongue weight capacity and with a weight distribution...
    view full answer...
  • Is Reese Titan Hitch Extender Available with a 2-1/2 Inch Receiver
    The Reese Titan extension # RP45018 does fit a 2-1/2 inch receiver but the other end is only available with a 2 inch receiver opening. At the 48 inch length the extension is rated for 4,000 pounds gross trailer weight or 6,000 pounds using weight distribution. You will just need a matching capacity ball mount or weight distribution shank that fits in a 2 inch receiver.
    view full answer...
  • Can Trailer with 918lbs Tongue Weight be Towed w/ Weight Distribution and Extension with ATV in Bed
    In order to get the extension you need and still use weight distribution you would need to have a 2-1/2 inch trailer hitch receiver on your truck. If you do not have one already I would need to know the year, make, and model of the truck to recommend one if available. To be able to tow a trailer with 918 pounds tongue weight you would need to have a special TorkLift trailer hitch and then use a SuperTruss extension which will have up to 14,000 pounds capacity when using weight distribution....
    view full answer...
  • Trouble Getting Titan Hitch Box Extension # RP45018 to Fit in Factory Installed Class V Hitch
    Actually, yes, you will most likely have to remove a bit of the powder coating on the Titan Hitch Box Extension, # RP45018. We have found that since Ford factory hitches have corners that are rounded a bit different than others, this creates a very tight fit with some of the hitch accessories that are available. I suggest that you do just a little bit of sanding and the extension should fit just fine.
    view full answer...
  • Actual Length of Titan Hitch Box Extension for 2-1/2 Inch Receivers Part # RP45018
    The 48 inch maximum length mentioned in the product description represents the distance from the furthest hitch pin hole on the vehicle side of the extender and the hitch pin hole on the other end. The distance from the hitch pin hole where the extension would attach to the receiver on your truck to the front face of the receiver on the extension is 50 inches. I have edited a photo showing what the 48 inch measurement represents.
    view full answer...
    Image 1 for
  • Why is There a Weight Distribution Towing Capacity on my 2007 GMC Yukon
    If you are unfamiliar with weight distribution systems check out the links I provided of the FAQ article and video on weight distribution systems. Some vehicles and hitches will have two different towing capacities, one for without a weight distribution system and one for with a weight distribution. Since these systems help vehicles carry the weight of a trailer more evenly on your vehicle axles the rating for with a WD system will be higher than without. Generally speaking you will want...
    view full answer...
  • Does the Titan Hitch Box Extension Bend Upward at the End
    The Titan hitch extender # RP45018 does have a slight bend in it closer to the receiver end. This is to help compensate for any sag caused by the length and weight of the extender so there basically won't be a difference in height between the hitch receiver and the receiver on the extender.
    view full answer...
  • Will Curt Titan Hitch Extender Fit a Curt Class V Hitch
    The Reese Titan Hitch Extender part # RP45018 will fit your Curt Class V hitch that has a 2-1/2 inch opening. The tongue weight capacity of the Titan Hitch Box Extension, # RP45018, is going to be 10 percent of the weight carrying rating or weight distribution rating of the extension. In this case, if the extension is used at the 41 inch extension you the limit is 500 lbs WC (750 with WD). If used at the 48 inch extension the limit would be 400 lbs WC (600 with WD).
    view full answer...
  • Does Reese Hitch Extender RP45018 Have to Be Cut if It Can Slide Through Hitch
    If you can slide the extender all the way to the shorter length without interference there would be no reason for you to have to cut it. With the safety chains you would run them from the trailer to the loops of the extender since they wouldn't reach to the vehicle.
    view full answer...
  • Can Reese Titan Hitch Extender Be Used to Tow a Trailer that has 400-450 Pounds Tongue Weight
    At the 48 inch length hitch extender # RP45018 for 2-1/2 inch hitches will have a tongue weight capacity of 400 pounds. Provided the tongue weight of the trailer does not exceed that 400 pound max you can use it to tow your trailer. At the 41 inch length the tongue weight capacity is 500 pounds. So if you can get away with 41 inches of extension you will have more wiggle room if the trailer's tongue weight is over 400 pounds but less than 500 when compared to the 48 inch length.
    view full answer...
  • Recommendations for Cutting Titan Hitch Extender
    A horizontal band saw with a blade that can cut steel would be your best option. But even a cutting wheel with a thin disc would work pretty well too. If you have access to a sawz-all that would be an option. But I would go with the first two options if you can before this.
    view full answer...
  • Weight Capacity of Reese Hitch RP45018 on a 2014 RAM 3500
    I can help you figure out what your new weight ratings would be with the Titan Hitch Box Extension # RP45018. If you decide to cut the extension to use it as a 41 inch application you will have a towing capacity of 5,000lbs and a weight distribution system towing capacity of 7,500 lbs.
    view full answer...
  • Hitch Extender Recommendation for 2013 GMC Sierra 3500 Towing with Camper that Extends 40 inches
    For a camper that extends 40 inches past the rear of the vehicle the Reese Titan Extender part # RP45018 that you referenced would be what you need. This fits 2-1/2 inch hitches like your truck has and has a 4k capacity when used in the longer 48 inch length or 5k when used in the 41 inch length. I wouldn't recommend adding the variable of a long ball mount with a shorter extension when the Titan makes the most sense and will work well.
    view full answer...
  • Tongue Weight of Titan Hitch Box Extension at 48 Inches
    The tongue weight capacity of the Titan Hitch Box Extension for 2-1/2" Trailer Hitches # RP45018 at the full 48" extension would actually be 400 lbs. It would be 500 lbs if you cut the extension down to 41".
    view full answer...
  • Can Shank for Weight Distribution Hitch be Modified
    I do not recommend modifying a shank for a weight distribution hitch or cutting off any part of the shank; there is no way to guarantee any modified shank can work. Additionally, even though we do not carry EA-Z Lift products, I would be strongly willing to bet using a shank that was modified would void the warranty. I have added a link to our selection of weight distribution shanks for you to take a look at as well.
    view full answer...
  • What is the Weight of the Titan Hitch Box Extension # RP45018
    The Titan Hitch Box Extension # RP45018 weighs approximately 55 pounds. If you were to cut it down from the 48 inch length to the 41 inch length it would of course weigh less, about 47 pounds.
    view full answer...
  • What Size Hitch do Longer Hitch Extensions Fit
    I wish we had a solution, but the only hitch extensions we have that are that long are ones that are for 2-1/2 inch hitches like the Reese part # RP45018 that you mentioned which is 41 to 48 inches in length.
    view full answer...

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