Price: $263.86

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

Item # RP45018

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reese hitch accessories fits 2-1/2 inch to 2 titan box extension for trailer hitches 41 - 48 long
reese hitch accessories extender reducer fits 2-1/2 inch rp45018
reese hitch accessories extender reducer fits 2-1/2 inch rp45018
reese hitch accessories extender reducer fits 2-1/2 inch rp45018
reese hitch accessories adapter fits 2-1/2 inch titan box extension for trailer hitches 41 - 48 long

Customer Photos

reese hitch accessories adapter fits 2-1/2 inch rp45018
reese hitch accessories adapter fits 2-1/2 inch titan box extension for trailer hitches 41 - 48 long
reese hitch accessories extender reducer fits 2-1/2 inch rp45018


  • Hitch Adapter
  • Hitch Extender
  • Hitch Reducer
  • Fits 2-1/2 Inch Hitch
  • 2-1/2 Inch to 2 Inch
  • Reese
  • 41 - 48 Inch
  • Steel
Call 800-298-8924 to order Reese hitch accessories part number RP45018 or order online at Free expert support on all Reese products. Guaranteed Lowest Price and Fastest Shipping for Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long. Hitch Accessories reviews from real customers.

Reese Hitch Accessories - RP45018


  • Steel construction with black powder coat finish
  • Designed to extend the receiver opening 41" or 48" away from the truck
    • Is 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 one-year warranty

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.

Extension Length WC Rating (lbs) WD Rating (lbs)
41" 5,000 7,500
48" 4,000 6,000
product dimensions

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

Value - This item

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
Reese Hitch Accessories

20 reviews

Code: RP45018


Our Price: $263.86

  • Hitch Accessories
  • Hitch Adapter
  • Hitch Extender
  • Hitch Reducer
  • 41 - 48 Inch
  • Steel
  • Fits 2-1/2 Inch Hitch
  • 2-1/2 Inch to 2 Inch
  • Reese
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Video of Titan Hitch Box Extension for 2-1/2" Trailer Hitches, 41" - 48" Long

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Reese Hitch Accessories RP45018 Review

Today we're going to be taking a look at part number RP45018, this is the Titan hitch box extension for 2 and a half inch trailer hitches. Now this portion here is going to be the portion that slides into the receiver tube of your hitch, and then this portion up here is going to be where you install your hitch inaudible 00:00:16 accessory, at the end of the extension. This is going to convert down to a 2 inch by 2 inch opening, and so it is designed to fit into a 2 and a half inch by 2 and a half inch and then it's going to adapt or convert down to a 2 inch by 2 inch. This is designed to extend the receiver opening 41 inches or 48 inches away from the truck, those measurements are going to be taken from center of hitch pinhole to center of hitch pinhole. This is going to be ideal for slide out campers with extended overhangs. The overall unit's going to be made from a steel construction with a nice black powder coated finish on it to help prevent and keep it protected from corrosion and any rust. This portion right here is going to be the included hitch cover. Simply just pops out, it's going to open up to the two inch by two inch receiver opening, it's also got this chrome plastic piece that goes around that collar, that can be removed as well, that simply just snaps on and off. Now all the pinholes on this system are going to measure 5 eighths of an inch.

If you need a hitch pin and clip for a 2 and a half inch trailer hitches you can find them on our website with part number 74149, that would be for these pinholes back here, securing the inside of your 2 and a half inch by 2 and a half inch trailer hitch receiver. If you would like the trailer hitch receiver lock, you can find that one our website, sold separately, part number 5201. Now here up front towards the opening where we would attach our accessory, at the 2 inch by 2 inch opening, you're going to have some safety chain loops. These are going to be designed to attach safety chains from your trailer onto the hitch receiver here. You're also going to have this bracket, this is for attaching your electrical outlet. Then you're going to have these chain loops, because it is required for you to have safety chains running from your tow vehicle to these connections, so that's what these are for here.

Now these are going to give us a diameter opening size of about 2 and 1 eighth of an inch. These loops are going to measure about 2 inches by 1 inch and a quarter. An important note to mention is that this product may not work on some OEM class 5 hitches with rounded edges, so definitely keep that in mind. Now the hitch box extension comes complete at 48 inches, and is designed to be cut down to 41 inches depending on your application. Again those measurements are simply just taken from center of hitch pinhole to center of hitch pinhole, so right there we have the 41 inch measurement, and then back here, extending it center on center, we have the 48 inch measurement. The capacities of this adapter of extender are labelled right there at the back of the shank, nice big sticker that points out all the capacities. Weight carrying capacity is 5000 pounds with the 41 inch extension, 500 pound ton weight, with the use of weight distribution that would increase to 7500 pounds and the ton weight would increase to 750 pounds. With the 48 inch extension the weight carrying load is 4000 pounds with a 400 pound ton weight.

When using weight distribution that increases to 6000 pounds of trailer max. weight, and 600 pounds of ton weight. That's going to do it for today's look at part number RP45018, this is the Titan hitch box extension for 2 and a half inch trailer hitches. .

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (20 Customer Reviews)

- RP45018

by: Don T08/14/2015

The product arrived within 4 days of ordering and in excellent condition. It fits into the hitch I recently ordered with no adjustments necessary. 219224


Still an amazing product and has been used this year on a long trip

Don T - 08/13/2016


- RP45018

by: Cathy G.08/01/2017

48" Titan hitch box extension on 2011 F-350 Dually 413413

- RP45018

by: SDJ03/12/2012

Reese did a very good job designing the 48" hitch extension. It is more substantial than I expected and it's load capacities are probably understated with good reserve margin for safety. Etrailer's service was exellent in all respects inclusive of product description, ease of ordering, exellent pricing, even better shipping and responsiveness, and perhaps best of all outstanding follow-up. I will be a repeat customer and highly recomend this company as a goto company for all your trailer needs. They obviously care about providing first class service and products. 33612

- RP45018

by: Kerry S.03/03/2011

Ordered my Reese hitch extension from and had it in 2 days. The Reese extension is very well built and beefy enough to do the job. I received excellent shipping and great communication from etrailer during the whole process. I will continue to use etrailer in the future. Love the free shipping....... Thanks 8337

- RP45018

by: Kevin P08/21/2014

Very Heavy Duty. This suits my application. I wanted to be able tow my boat or trailer with my Slide in Camper. I had to do some modification to get it to fit my Ford factory installed class V hitch (needed to grind off the powder coating). Other than that, it works well. 147829

- RP45018

by: Doug05/31/2016

Well designed and HEAVY. Plate for electrical connector is a little too close to the hitch pin (which makes it difficult to get a 7-pin plug in). Otherwise, no complaints. Works as intended to tow my boat behind my truck camper. 254880

- RP45018

by: Dave R02/18/2017

I was in need of a longer hitch. The representative was very helpful. The hitch is well built of heavy construction. Being the first time ordering from the company I am highly satisfied. I will be a repeat customer. 343205

- RP45018

by: Robert Leiler11/17/2014

Haven't had the opportunity to use it , but it looks heavy duty and I think it will do the job quit well.Note:the service and shipping has been great.I would have no problem ordering more products in the future. 161436

- RP45018

by: Chris R06/06/2016

When I purchased my camper I knew I eventually wanted this extender. I was not only happy that it arrived in timely manner but it was also the exact one I wanted. Haven't used it yet but very happy to have it 258094

- RP45018

by: Bill01/11/2008

***** Class 5 hitch extension, great service, BEST price, free shipping and prompt service, the Gal i talked to was "ON THE BALL".........***** Now that's all i got to say about that!!!! 563

- RP45018

by: Mike J.08/03/2012

My product arrived faster than expected and fit perfect on my 3500. Great doing business with you. Thanks 50358

- RP45018

by: Brett06/29/2016

Works well towing a utility trailer with bikes on it. Have not tried it with heavy trailer yet. 266385

- RP45018

by: steve s08/25/2014

As advertised, very heavy duty. Used as an extension when camper is loaded. 148457

- RP45018

by: Mick V08/11/2014

Very Good Service and a great product.Very Heavy Duty just what I wanted. 146048

- RP45018

by: Jim S.06/22/2011

Delivery was really fast. Would do business with these folks again. 17621

- RP45018

by: johnnycap04/26/2011

trouble fitting into hitch receiver...nice paint and workmanship 12406

- RP45018

by: Ed P07/22/2017

Product received on time...awesome company. Thank you 409435

- RP45018

by: D J H09/27/2012

Great people...Super Fast Shipping....T hanks!!!! 55956

- RP45018

by: Smith, M09/12/2011

Smoking fast shipping !!!!! Thanks, 23791

- RP45018

by: Mike B07/27/2017

Just what I was looking for at a great price. 411471


Ask the Experts about this Reese Hitch Accessories
Do you have a question about this Hitch Accessory?

  • How is the Reese Titan Hitch Box Extension Supported and Does it Require Stabilization Chains
  • The trailer hitch on the truck is what supports the extension. The extension is designed to fit in a 2-1/2 inch receiver (measuring on the inside) and the receiver part of the extension has a 2 inch receiver opening. The only thing you need for the extension is a properly sized hitch pin like # 74149. For lateral, back and forth movement of the extension, it is normal to see some play. Reese does not make any lateral stabilization chains for the Titan extensions. You will need to...
    view full answer...

  • Use of Hitch Extension to Tow a Trailer on 2011 Ford F-350 Dually Crew Cab With a Slide-In Camper
  • I have two hitch box extensions for the 2-1/2 inch hitch on your 2011 Ford F-350 Dually Crew Cab, but they both will reduce the hitch receiver size down to 2 inches. These extensions are specifically designed for your slide-in camper with the extended overhang. The first extension is the Titan Hitch Box Extension and Reducer, part # RP45292. This extension will only extend your hitch out 24 to 34 inches, so this will not work for your application that will need 36 inches. The second...
    view full answer...

  • 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...

  • Trailer Hitch Extension to Tow a Boat Trailer with a GMC Sierra 2500 with a Lance Camper
  • I take it that your Lance camper overhangs the truck bed so you need an extension of some kind. There are a couple of possible solutions. Many extensions will reduce the tongue weight capacity of a trailer hitch by 50 percent. However if you were to use a long ball mount, the capacity is not nearly as affected. A ball mount like # 80232 measures 16 inches from the center of the hitch pin hole to the center of the ball hole. I have linked a video review for you. I have also linked all...
    view full answer...

  • How Much Rattle and Slop is Too Much for An Accessory Used in a 2-1/2 Inch Trailer Hitch
  • Some accessories fit more loosely than others in any given trailer hitch. If you think that the receiver is getting worn out, I recommend measuring the inner opening width and height to see if it is still at 2-1/2 inches. Also check the accessories you are using. They should be slightly smaller so they can fit in the receiver easily. There will always be some play. The longer the accessory, the more it will appear to move. The Titan extension # RP45018 as an example is so long that a...
    view full answer...

  • Hitch Extender Recommendation for a Ford Super Duty Hauling a Camper and Flat Towing a Honda CR-V
  • The closest hitch extension that we carry for your setup is the Titan Hitch Extender, # RP45018, that you referenced. This hitch extension was designed to work with 2-1/2 inch x 2-1/2 inch trailer hitch receivers only and reduces down to a 2 inch receiver for your Blue Ox tow bar. You will want to measure the height and width of your trailer hitch receiver opening to ensure that you can use this extension with your hitch. When using this hitch to flat tow your Honda CR-V, you will want...
    view full answer...

  • Availability of an Adapter to Use the Titan Hitch Extender # RP45018 with a 2 Inch Hitch
  • I cannot recommend either of the situations that you mentioned for safety reasons. If you were make a reducer for the Titan Hitch Box Extension for 2-1/2 inch Trailer Hitches, 41 - 48 inches, item # RP45018, it would lower the weight carrying capacity of the hitch and the extension, and could cause an unsafe towing condition. A solid steel bar while it seems very sturdy would most likely have less weight carrying capacity than a square tube extension like the Titan extension. The...
    view full answer...

  • Hitch Extension and Weight Distribution System Recommendations for 2013 Ford F-150 Towing Trailer
  • Almost all hitch adapters and extenders have the side-effect of reducing your hitch's tongue weight (TW) and gross trailer weight capacities by as much as 50-percent. This is true for the 18-inch hitch extension for 2-inch hitches # HE18 from Hidden Hitch. This extender tube fits into a 2-inch hitch and provides 18-inches of extension to its 2-inch receiver opening. All other things being equal the shorter extension is the better extension. All 2-inch extenders are shown on the included...
    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...

  • Can Tow Ready Combo Bar # 80948 be Inserted into a 2-1/2 Inch Receiver
  • The outside width of combo bar # 80948 is slightly less than 2-1/2 inches so it would fit in a 2-1/2 inch receiver. But this bar is meant for hitch fabrication and not meant as a hitch extender. For a 48 inch extender that is rated for use as an actual extender and that already has the safety chain loops welded to it you could use # RP45018. Of course there is quite a bit of difference in cost.
    view full answer...

  • Tongue Weight Capacity of Titan Hitch Box Extender # RP45018 on a 2002 Ford F-350 Super Duty
  • 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). You will need to weigh your trailer tongue weights, fully loaded and ready to tow. If the tongue weights exceed the capacity...
    view full answer...

  • Trailer Hitch Extensions for a 2009 Chevy Tahoe
  • Item RP45018, the Titan Hitch Extension, will not work for your application. When measuring a hitch, measure from inside the hitch, straight across to the other side (inside); then inside the hitch, top to bottom. Your hitch is likely a 2 inch hitch if it is a OEM hitch. The Titan Extension, will only work on 2-1/2 inch x 2-1/2 inch receivers. An alternate application is product number HE18, the 18 inch trailer hitch receiver for 2 inch hitches. The rating on this extension is 3,500...
    view full answer...

  • Why the Weight Carrying Rating is Higher on Longer Titan Hitch Extender # RP45018 than Short One
  • I ran this by my contact at Reese. This is a little tricky but I can explain. If you look at the pictures I have included for each Titan Hitch Box Extension (# RP45018 and # RP45292) you will notice that the distance between the 2 hitch pin holes is different by 3 inches. On the longer extension the distance between the furthest out hole and the end of the receiver is longer which allows it to carry more weight at 41 inches. The 3 inch difference is the key factor.
    view full answer...

  • Does the Factory Need to be Removed to Install the Curt Hitch part # C15810
  • Yes, the factory hitch on your 2013 Ford Super Duty truck will need to be removed to install the Curt Trailer hitch part # C15810. If you need trailer wiring you would want the Draw Tite wiring harness part # 18252. For a ball mount and hitch ball you would want the Ball Mount kit part # EBMK25318. You could use the Titan Hitch Box Extension # RP45018 with this hitch as well.
    view full answer...

  • Trailer Hitch Extension for 2009 GMC Sierra with 2-1/2 Inch Hitch Towing a Boat with In-bed Camper
  • First, the Ford 2-1/2 inch hitch has be known to have some compatibility issues with some accessories. The problem is that the hitch receiver has more rounded corners than a lot of accessories that have more square corners. In the event you run into this issue, what you can do is gently and carefully remove some of the powder coating around the accessory shank until it fits. Do not remove any metal. This will weaken the accessory. The extension length you need is going to be based...
    view full answer...

  • Will Curt Class V Trailer Hitch 15809 Fit a 2011 Dodge Ram 3500 and Titan Hitch Extension
  • Yes, the Curt trailer hitch # C15809 will fit your 2011 Dodge Ram 3500. As far as the Titan extension, # RP45018 or # RP45292, I have tested these extensions in a Curt hitch with the 2-1/2 inch receiver and found that it will fit. I have included a link to the installation instructions for the trailer hitch.
    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...

  • 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...

  • Hitch Extender to Tow a Trailer with a 2005 GMC Sierra 2500 with Truck Bed Camper
  • First you will need to determine if the trailer hitch on your 2005 GMC Sierra 2500 is a 2 inch or 2-1/2 inch. Just measure the opening width to determine the size. I am assuming that the tailgate is down and/or the camper overhangs the back of the truck thus the need for an extension. I recommend an extension that is long enough to where the face of the receiver is flush with or a few inches recessed under the rear most part of the truck or camper, whichever extends out the furthest. If...
    view full answer...

  • Safety Chains for Use with Titan Hitch Box Extension RP45018
  • A good option for a safety chain for use with Titan Hitch Box Extension # RP45018 is the Laclede Chain Safety Chains and Cables, part # 2118-348-04. These offer a minimum breaking strength of 5000-lbs and are USA-made.
    view full answer...

  • Class V, 2-1/2 Inch Trailer Hitch and 41 Inch Extension for 2007 Ford F-350 with 18 Inch Spare
  • Since the spare tire on your 2007 Ford F-350 XLT is an 18 inch it will not be a problem for Curt Trailer Hitch Receiver - Custom Fit - Class V - 2-1/2" Item # C15810. The hitch works with spares that are 20 inches and smaller. Anything larger than 20 inches though and the spare would not fit back into place. I have linked a video showing an example installation of this hitch for you. For an extension to get out to 41 inches you can use # RP45018. With this extension at the 41 inch length...
    view full answer...

  • Longer Hitch Extension for Backing Boat Down Ramp
  • If you have a 2 inch hitch we do not have any solutions for this. If you have a 2-1/2 inch hitch we have the # RP45018. Depending on how the angle of the ramp changes a super long extension may not be a great idea as it would either point the nose of the trailer up super high or down to low. The longest extension we have for a 2 inch hitch is 18 inches and it would be part # HE18. Using a hitch extender cuts the capacity of the hitch it is used on in half.
    view full answer...

  • Will the Reese Hitch Extension RP45018 and Curt hitch C15809
  • Yes, you can use a Titan Hitch Box Extension # RP45018 with the Curt Hitch 15607 that you referenced. The # C15809 is also confirmed to fit your 2008 Dodge Ram 3500 with a factory hitch. You should note the different capacities the # RP45018 has. If you use it at the full 48 inches of length it has a 4,000 lb capacity. Or if you cut it off to use it as a 41 inch extension you would have a capacity of 5,000 lbs.
    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...

  • Will a Reese Titan Hitch Extender Fit a 2016 Ford F-350 with 2-1/2 Inch Factory Trailer Hitch
  • The problem with the Ford 2-1/2 inch hitches has apparently been resolved and affects older models. We have not heard of there being an issue on the 2016 Ford F-350 or even a few years earlier. There are actually 2 Titan hitch extenders. One is # RP45292 which can be 24 to 34 inches long. The other is # RP45018 which can be 41 to 48 inches long. The different extensions and different lengths within each have different capacities and they are specified on the product pages.
    view full answer...

  • 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...
    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...

  • Can 2007 GMC Yukon Flat Tow a Nissan Altima
  • You'll want to check your Yukon owner's manual for its rated towing capacity since the vehicle can be equipped with different engines, transmissions, etc that will affect its towing weight capability. On the GMC website they state that the Yukon can flat tow another auto IF it is the 4WD version and has the 2-speed transfer case. To be absolutely sure you can contact your local GMC dealership with your Yukon VIN. They can look up the truck to see the exact complement of equipment it has...
    view full answer...

  • Flat Towing Capacity of Reese RP45018 Hitch Box Extension
  • At the 48 inch length, the Reese # RP45018 Hitch Box Extension has a 4000 lb capacity, and a 6000 lb rating when used with weight distribution. Even though in your situation, there won't be any tongue weight exerted on the extension, the towing capacity still wouldn't change from 4000 lbs according to Reese. I'm sorry to say at the 48 inch length, the Hitch Box Extension wouldn't be a good choice for your Wrangler Unlimited. It might be possible to use the bar at the 41 inch length,...
    view full answer...

  • Options to Allow Use of Hitch-Mount Tandem Bike Rack on 2014 Silverado 2500 with In-Bed Truck Camper
  • Thank you for providing all the pertinent details about your truck/camper set-up. A long hitch reducer/extender such as Curt # C45048 and Reese # RP45292 will give you the reach you need to clear the rear of your truck bed camper and also reduce your receiver opening size from a 2-1/2-inch to the 2-inch size you need for your tandem bike rack. When used at their maximum 34-inch length both the Curt and Reese extenders will have lower weight capacity, 450-lbs, than if cut down to a...
    view full answer...

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Info for this part was:

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Expert Research:
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Expert Research:
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Expert Research:
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Expert Research:
Adam R
Updated by:
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Installed by:
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