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.

expert reply by: Jameson C

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.