What Size Hole Saw do I Need to Make the Hole in the Bed of My Truck to Install B&W Gooseneck Hitch?

Updated 09/26/2025 | Published 05/04/2025

Question:

What size hole saw is required for installation?

asked by: Steven E

Expert Reply:

Hello Steven,

You will want to use a 3 1/2" bit as you need a 3 1/2" hole for the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs # BWGNRK1320. I attached an image where it goes over the size hole needed in the instructions.

Did you already get the hitch, or thinking about installing one?

expert reply by: Kate F

B&W Instructions Hole Size
(click to enlarge)

Kate F.

9/26/2025

Hey Steven, did you find the 3 1/2 bit and get the hitch installed? I'd love to hear how it worked out for you, as it could help others looking to install the same hitch.