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Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Item # RP50085-58
Our Price: $438.70
Fifth Wheel Installation Kit

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Shipping Weight: 69 lbs
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Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails, and hardware included. 1-800-940-8924 to order Reese fifth wheel installation kit part number RP50085-58 or order online at etrailer.com. Free expert support on all Reese products. Great prices and Fastest Shipping for Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
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  • Reviews (6)
  • Q & A (0)
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Reese Fifth Wheel Installation Kit - RP50085-58

  • Above the Bed
  • Reese
  • Custom

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails, and hardware included.


Features:

  • Custom brackets mount beneath your truck bed to provide attachment points for 5th-wheel rails
  • Base rails sit in truck bed and allow installation of 5th-wheel trailer hitch
  • Vehicle-specific brackets mount to existing holes in your vehicle's frame
    • Minimizes drilling and measuring
    • Cuts installation time in half when compared with universal bracket systems
  • Kit includes custom brackets, rails, and hardware
  • Compatible hitches: Curt, Draw-Tite, Hidden Hitch, Reese, Valley, and Husky
    • Will not fit Reese Elite Series (Signature Series) or Valley UBS hitches
  • Black powder coat finish resists corrosion
  • 10-Year limited warranty


50085 Reese Custom Quick Installation Brackets

58058 Reese Fifth Wheel Rails - 10 Bolt Design

Installation Details RP50085-58 Installation instructions

This Product Fits The Following Vehicles

  • 2013 - 2024 Ram 3500 6-1/2 Foot Bed without OEM Prep Pkg
  • 2013 - 2024 Ram 3500 8 Foot Bed without OEM Prep Pkg
  • 2013 - 2014 Dodge Ram Pickup 3500 - 6-1/2 Foot Bed without OEM Prep Pkg
  • 2013 - 2014 Dodge Ram Pickup 3500 - 8 Foot Bed without OEM Prep Pkg




Customer Reviews

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches - RP50085-58

Average Customer Rating:  4.2 out of 5 stars   (6 Customer Reviews)

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails, and hardware included.

by:
2018 Ram 3500

I've bought 2 Reese Quick Install kits this year, the sales reps at etrailer were very helpful.Shipping times great. Did have wrong bracket in one order, was taken care of promptly.



by:

Very poor design for the Ram 3500. The front brackets have four holes to secure the rail. Two are used and the other two bolts use spacers and the bed to secure the rail. Should be designed to use all of the bracket for a stronger hold on the hitch.



by:

Front brackets do not have a specific spot they can be installed, So it just makes it harder to line up properly before drilling into your bed



by:

Very good no problem installing every so often just go over the bolt on the frame of truck for tightness



by:

Excellent, well built, well designed kit. Install went without any issues.



by:


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See what our Experts say about this Reese Fifth Wheel Installation Kit

  • Can 2018 Ram with Ram Box Tow Fifth Wheel Hitch
    The only solution for towing a fifth wheel trailer with a Ram Box truck so that you can make turns without interference is a Sidewinder pin box on the trailer. The problem with the Ram Box is that is that it puts the rails of the bed too close together and it causes interference with the pin box of the trailer around corners. We have heard several customers say that with a Sidewinder pin box they were able to tow a fifth wheel trailer with a truck with a Ram Box. Sidewinders move the...
    view full answer...
  • Recommended 5th Wheel Trailer Hitch Install Kit for 2014 Ram 3500
    I recommend the Reese custom kit, part # RP50085-58, for your 2014 Ram 3500. Since it's a custom install it reduces the amount of drilling and time required for the install. It'll give you industry standard rails which the Anderson Ultimate, part # AM3200, will fit right into.
    view full answer...
  • Fifth Wheel Rail Kit Recommendation for 2014 Dodge Ram 3500
    For your 2014 Dodge Ram 3500 we have Reese rail kits that are a confirmed fit that will work perfectly with your Reese 14k fifth wheel hitch. For that your best option is a custom install kit as it will minimize install time and drilling. So you'd want the Reese kit part # RP50085-58 which is the correct kit for your truck.
    view full answer...
  • Reese Quick-Install Custom Bracket Kit for a 2018 Ram 3500 with a 6-1/2' Bed
    The correct Reese Quick-Install Custom Bracket Kit for a 2018 Ram 3500 with a 6-1/2' bed is the part # RP50085. The part # RP50054 is only a fit for a 2018 Ram 2500. We have the complete base rail kit available as part # RP50085-58 but if you already have the Base Rails # RP58058 then you would just need the Bracket Kit # RP50085 and the Replacement Hardware # RP58430 since the hardware is only supposed to be torqued to specs one time.
    view full answer...
  • How To Tow a 5th Wheel Trailer with a 2018 Ram 3500 That Has RamBox
    I do have an option for you but because of the RamBox feature on your 2018 Ram 3500, the B&W Companion Slider Gooseneck-to-5th-Wheel Trailer Hitch Adapter part # BWRVK3400 will not work for you. The reason being is because it cannot be used with a rotating pin box which is needed to prevent the pinbox from coming into contact with the bedsides. In order to tow a 5th wheel trailer with your truck you will need to use a fixed hitch with a rotating pin box. For a fixed hitch I recommend using...
    view full answer...
    Image 1 for
  • 5th Wheel Installation Kit for a 2015 Ram 3500 Dually Short Bed
    As long as your 2015 Ram 3500 dually short bed does NOT have the 4 pucks (factory 5th wheel prep package) then you will be able to install a 5th wheel installation kit such as # RP50085-58. I do believe that models that do not have the prep package all have that beefy cross member that you are referring to. I have included a link to the installation instructions for you.
    view full answer...
  • Fifth Wheel Rail Kit Recommendation for a 2015 Ram 3500 to Install 22k Reese Fifth Wheel Hitch
    To install the Reese 22k Fifth Wheel Hitch part # RP30033 in your 2015 Ram 3500 without the factory rail kit will only require you to install the correct fifth wheel rail kit. For that you would want the custom install kit that will minimize drilling on your vehicle and will cut install time considerably. For that you would want part # RP50085-58.
    view full answer...
  • Fifth Wheel Rail Kit Recommendation for 2018 Ram 3500 Short Bed
    Reese has three rail kits available for your 2018 Ram 3500 short bed with the Ramboxes. The one I recommend is the part # RP50085-58 as it is a custom install kit that will give you the smaller dimension rails. The part # RP56010-53 is a kit that has brackets that install on the outsides of the truck frame which makes it a bit easier to install but the rails are bigger. The part # RP30035-520 is a semi custom kit that will be much more involved to install. Since you have a Rambox truck...
    view full answer...
  • Recommended Fifth Wheel Hitch for 2018 Ram 3500 with RamBox
    For your 2018 Ram 3500 with RamBox, I recommend the Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches # RP50085-58 to give you custom mounting brackets for your vehicle and industry standard rails compatible with most 5th wheel hitches. For your 5th wheel hitch, I recommend the Reese M5 5th Wheel Trailer Hitch # RP30928 which will work very well with these rails and will give you a very strong and reliable hitch. You will also need a Sidewinder Pin...
    view full answer...
  • How To Use Reese 5th Wheel Trailer Hitch On 2013 Dodge Ram Pickup
    In order to use the Reese 5th Wheel Trailer Hitch part # RP30047 on a 2013 Dodge Ram Pickup, I recommend the Reese Quick-Install Custom Installation Kit part # RP50142-58 for 1500 models, part # RP56011-53 for 2500 models, or part # RP50085-58 for 3500 models. This route would not require any drilling into the frame.
    view full answer...
  • Recommended Sidewinder And 5th Wheel Hitch For A 2016 Ram 3500 And Grand Design Momentum 5th Wheel
    For the fifth wheel hitch I recommend Reese M5 5th Wheel Trailer Hitch - Single Jaw - 20,000 lbs # RP30928. If your 2016 RAM 3500 has oem prep package then you'll also need Installation kit # RP30154. If there isn't a prep package then you'll instead need installation kit # RP50085-58. Unfortunately, there is not a rotating pin box that is rated higher than 20,000lbs so you will need to ensure you stay under the 20,000lbs when loaded to safely tow your 2019 Grand Design Momentum 376TH...
    view full answer...
  • 5th Wheel Hitch Install Kit for 2014 Ram 3500 Crew Cab Long Bed
    According to my Reese representative, with the 2014 Ram 3500 you need to use one of the Custom Install Kits, such as part # RP50085-58. The custom install kit doesn't require any holes be drilled into the truck frame (just up through the bed to join the rails to the frame brackets). The RBW Lil Rocker is compatible with industry standard bed rails, so it will be compatible with the bed rails supplied with the kit I recommended above. If you don't already have a 7-way installed in your...
    view full answer...
  • Reese Fifth Wheel Rail Kit that Fits 2020 Ram 3500 without OEM Rail Kit
    Reese has fifth wheel rail kits that fit your 2020 Ram 3500 but due to the design of the truck you'd have to use a custom fit since none of the universal kits fit the truck. So Reese has the # RP50085-58 which is a fit that would be a much better option than a universal kit as it does not require frame drilling and also minimizes install time.
    view full answer...
  • Under Bed Brackets Only for Reese 10-Bolt Rails and a 2016 Ram 3500 Short Bed
    For your 2016 Ram 3500 short bed and Reese rails you can use custom brackets # RP50085. These are the brackets by themselves without the rails. It comes with the necessary hardware to attach the brackets to the frame and the rails to the brackets.
    view full answer...
  • 5th Wheel Trailer Hitch and Installation Kit for a 2016 Ram 3500 Short Bed with Ram Boxes
    Based on your earlier question you indicated that the trailer has a gross weight capacity of 18,000 pounds so you would want a hitch that exceeds that for safety. the other issue is the Ram Box feature. The Ram Boxes mean that you will have to have one of two possible set ups: 1) A fixed 5th wheel hitch with a Sidewinder pin box 2) A Demco hitch that has 22-1/2 inches of travel The second option will not work because that hitch has a capacity of 13,000 pounds. So you will need to use...
    view full answer...
  • Fifth Wheel Rail Kit Recommendation for 2015 Dodge Ram 3500 for Draw Tite Slider Hitch
    For your 2015 Ram 3500 we have rail kits that will work with your Draw Tite slider hitch. Best option would be a custom install kit that will install much quicker than a universal style kit and will minimize drilling. For that you'd want the # RP50085-58 which is a confirmed fit.
    view full answer...
    Image 1 for
  • Recommended Fifth Wheel Hitch For A 2021 Ram 3500 With Ram Boxes
    Since your 2021 Ram 3500 has Ram boxes you will most definitely want a rotating pin box like the # RP61422 to prevent the pin box from coming into contact with the bed rails. This will also increase the turning radius because you'll be pushing the pivot point back 22". Pin boxes have specific bolt patterns so you'll need to find the correct replacement for your trailer's current pin box. If you need help determining the correct fit then just send me some pictures of your current pin box...
    view full answer...
  • Can a Single Attachment Point B&W Companion 5th Wheel Hitch be Used with a Sidewinder Pin Box
    You actually shouldn't be using a B&W Companion hitch with a Sidewinder at all. The problem is because of the single attachment point and the force applied to the hitch from the Sidewinder it could cause the gooseneck hitch under the bed to get damaged or even break free causing the whole assembly, including the Companion, to rotate. The only difference between the regular Companion and slider is that the slider can slide back to allow more clearance between the truck and trailer when...
    view full answer...
  • Install Kit for Reese Titan 16K On a 2013 Ram 3500 SRW and DRW
    Yes, the Reese Quick-Install Custom Installation Kit part # RP50085-58 is a fit for a 2013 Ram 3500 (SRW and DRW) and will work perfectly with the Reese Titan 16 5th Wheel Trailer Hitch part # RP30866. The Reese Quick-Install Custom Installation Kit is a custom fit kit so there will be no cutting or drilling into the frame. We also have the 5th Wheel/Gooseneck 90-Degree Wiring Harness part # 50-97-410 which will be good to have as well. If you by chance have the factory in-bed pucks then...
    view full answer...
  • Can I Use an Andersen Ultimate Hitch with a Reese Sidewinder
    I have a solution for you, but the Andersen Ultimate Hitch # AM3200 is not compatible with a Reese Sidewinder like the # RP34FR, or any other rotating pin box. The Reese Sidewinder cannot be used with any Gooseneck Adapters because they do not offer a secure enough mounting point with the gooseneck ball and you do not want two pivot points in your towing setup. If you want to use a Reese Sidewinder, you will need to use a standard fixed 5th wheel hitch. If you've got the OEM prep package,...
    view full answer...
  • Comparing Reese Quick-Install Custom Installation Kits for a 2020 Ram 3500
    The Reese Quick-Install Custom Installation Kit part # RP50085-58 and part # RP56010-53 are both correct for a 2020 Ram 3500. The difference is that the latter comes with outboard base rails and the former comes with inboard base rails. The outboard base rails are easier to install since they attach outside the frame whereas the inboard base rails are harder to install since they attach inside the frame but that's it.
    view full answer...
  • Will the B&W Companion Work With Sidewinder On 2018 Ram 3500 with RamBox
    I do have an option for you but in order to tow a fifth wheel trailer using a truck with RamBox like a 2018 Ram 3500, you'll have to go with a pin box with rotating turret as that's the only way to clear the bed sides. Pin boxes with rotating turrets like the Reese Sidewinder cannot be used with gooseneck to fifth wheel adapters like the B&W Companion. Therefore, the only option would be a new fixed fifth wheel hitch. I recommend the Reese M5 5th Wheel Trailer Hitch part # RP30928 with...
    view full answer...
  • 5TH Wheel Hitch Rails And Custom Under Bed Brackets For a 2014 Dodge Ram 3500 With a 6-1/2' Bed
    We have multiple kits to Install Reese 5th wheel hitch rails on a 2014 Ram 3500 with a 6-1/2' bed. The Reese Quick-Install Custom Installation Kit # RP50085-58 is designed for models with the factory air suspension. We also have the Kit # RP56010-53 for models without the factory air suspension.
    view full answer...
  • How to Tow a 5th Wheel Trailer with a 2018 Ram 3500 Short Bed Rambox
    As long as you are using a Sidewinder pin box, you should not have any problems with a 5th wheel trailer on your 2018 Ram 3500 with Rambox. The Rambox limits the side to side clearance in your truck bed which is problematic for fixed pin boxes as they will likely contact the inside of the bed. Using a Sidewinder will move the pivot point away from the bed sides and will allow for greater turning clearance and minimized interference. Unfortunately, an under bed mounting kit is not compatible...
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Carrie F
Updated by:
Carrie F
Employee Laura H
Written by:
Laura H

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