Which Set of Rail Slots Does the B and W Companion for Universal Rails Fit
Updated 01/19/2026 | Published 12/22/2025
Question:
I was wondering what the spacing was between the pins my truck has what I believe is a older style set of industry standard rails they are spaced at 22inch apart and they only have the 10inch center to center slots and the 20.5inch center to center slots i do not have the 29inch center to center slots i wanted to know if this hitch used the 20.5inch slots or if I need to replace my rails as alot of the 20k+ gtw hitches ive seen use the 29inch slots I have a 96 f350 crew cab 8ft bed dually
asked by: Nicholas
Expert Reply:
Hey Nicholas, the B and W Companion for ISR rails part # BW52AR is designed to fit the widest 29 inch slots of the rails so your current rails would not work. For a set of rails with this spacing that fits your 1996 Ford F-350 you'd want the part # RP30035.
Product Page this Question was Asked From
B&W Companion 5th Wheel Trailer Hitch - Dual Jaw - 20,000 lbs
- 5th Wheel Hitch
- Fixed 5th Wheel
- Above Bed Rails
- 5000 lbs Vertical Load
- 20000 lbs GTW
- Double Pivot
- Standard - Double Jaw
- 16 - 19 Inch Tall
- B and W
more information >
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on 5th Wheel Hitch
Jameson C.
1/19/2026
Hey Nicholas, how did things go after switching to the rails with the 29-inch spacing for your F-350? Your update could make it easier for the next person trying to match their older rails with a heavy-duty hitch.