What Replacement Rails Do I Need to Use My RetraxPRO MX on My New 2021 Ram 3500?
Published 10/04/2021 >
Question:
Unfortunately my truck, 2021 GMC Sierra 3500 long bed was totaled in an accident. I was unable to get the same truck. But my RetraxPro MX survived. I was able to get another truck with the current shortage, but it was a 2021 Ram 3500 long bed. I would like to just get replacement rails for my current RetraxPro instead of buying a whole new system. Do you sell the rails that will fit the new Ram 3500?
asked by: Landon
Expert Reply:
I have a solution for you. I confirmed with my tech at Retrax that the RetraxPRO MX # RT80485 (designed to fit your 2021 GMC Sierra 3500 with an 8-ft. bed) is different in several ways than the RetraxPRO MX RT80237 (designed to fit a 2021 Ram 3500 with an 8-ft. bed). For example, there is a 1/8 inch difference between the bed lengths. Another difference is the width of the beds and the tailgate measurements.
With these differences, even if we could provide different replacement rails to make your cover work with your new 2021 Ram 3500, you would still need many more parts to accommodate the differences in the dimensions. With that being said, I recommend getting the RetraxPRO MX RT80237 for your new truck. This is the most economic option as well as the most assured way to get the cover installed the quickest (since we will not have to troubleshoot and discover all of the individual parts you need).
Product Page this Question was Asked From
RetraxPRO MX Hard Tonneau Cover - Retractable - Aluminum - Matte Black
- Tonneau Cover
- Retractable - Manual
- Opens at Tailgate
- Built-In Lock
- Low Profile - Top of Bed Rails
- Aluminum
- Matte
- Retrax
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: Recommended Air Bag Kit With Compressor for 2026 Chevrolet Silverado 2500
- Q&A: Retrax Pro MX Tonneau Cover that Fits 2024 GMC Sierra 3500 Long Bed Dually
- Q&A: Do The Firestone Extreme Duty Air Helper Springs F2706 Have Internal Jounce Bumpers?
- Q&A: Retractable Tonneau Cover for 2026 GMC Sierra 3500 Long Bed
- Article: Choosing the Right Suspension Kit for Your Truck and Trailer
- Q&A: How Does Curt Echo Brake Controller Know When to Apply Trailer Brakes
- Q&A: Will Gen-Y Hitch Nomad Gooseneck Pin Box Void Lippert Frame Warranty
- Q&A: What is Difference Between UWS Truck Bed Chests # UWS08298 and # UWS01044
- Article: Guide to Choosing the Best Truck for 5th-Wheel Towing
- Article: How to Measure for Travel Trailer and Fifth Wheel Steps
- Article: How to Measure for Trailer Hitch Drop
- Article: Hand Winches
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Article: Big Truck Big RV


