How to Tell the Difference Between a 4-Bolt and a 10-Bolt 5th Wheel Hitch Mounting Rail

Updated 06/06/2014 | Published 06/04/2014

Question:

How do you determine if you have a ten bolt reese rails? Thanks

asked by: Charles D

Helpful Expert Reply:

It's pretty simple. A 4-bolt rail uses four 5/8 inch bolts ran through the floor of the truck bed into the frame brackets. The bolts run down through the center of the raised part of the rail, as shown in the photo I provided. A 10-bolt rail uses ten 1/2 inch bolts through the flanges that sit flat to the truck bed, also shown in the photo.

expert reply by: Mike L