The MORryde pin box system utilizes a unique rubber shear spring to positively deal with rough towing and road shock. The rubber spring works in a horizontal planar motion (in a longitudinal and lateral motion) to absorb the towing shock. This allows the MORryde pin box system to effectively diminish the transfer of forces from the trailer to the truck. Ordering a MORryde Pin Box System for your fifth wheel is simple and straight forward. Please identify the following:

  • What is the GVWR of the trailer?
  • What is the part number of the stock pin box (usually found on a label on the pin box)?

MORryde has a specific rubber spring for different weight ratings. Cross reference these answers to a MORryde RPB part number. OR, if the stock part number is not available, a few easy measurements will tell you what you need. Please  download the Pin Box Identification Guide that outlines the measurements you need and how to cross reference them to a MORryde RPB part number.

Fifth wheel owners know about that harsh, jerky, chucking action that comes from towing a fifth wheel. They also recognize that some roads will just wear you out from that jerking/chucking action. They have just come to accept it as a normal part of towing.  These uncomfortable aspects of towing are the result of longitudinal and lateral forces being transmitted from the trailer to the truck. They cause that troublesome chucking action you feel, especially on Interstate highways with expansion joints. They also contribute to the harshness and jerking you feel when going over railroad tracks or roads with that washboard effect. And, these forces cause that "clunking feeling" when you come to a stop and start up again.

The MORryde Pin Box System provides:
  • Greatly reduced back-and-forth chucking and jerking
  • Cushioned sensation over uneven road conditions
  • Jerk-fee starts and stops
  • Smoother, more comfortable in-cab ride

 The Rubber Pin Box system can be installed on most fifth wheel trailers. Installation is bolt-on and typically takes about one hour. Watch the full product video.

United States Patent Number 6,986,524


of the MORryde Rubber Pin Box:


Other Pin Box You May Be Interested In