2011 RAM 3500 8' Hard Folding Truck Bed Cover

Premium Low Profile Aluminum Truck Bed Cover

The Longest Working Bed Gets the Strongest Cover — Built for the Second Year of the Fourth Generation RAM 3500

The 2011 RAM 3500 continued the fourth-generation heavy-duty platform with second-year refinements — updated technology packages, improved Cummins diesel calibration, and expanded trim availability — on the same proven one-ton bed architecture introduced with the 2010 redesign. The 8' Long Bed carried forward unchanged, now backed by one full year of real world validation across demanding commercial, agricultural, and one-ton long bed applications.

The Thunder Armor Hard Folding Tonneau Cover is precision engineered specifically for the 2011 RAM 3500 8' Long Bed on the fourth-generation platform. Designed and manufactured in the USA by Thunderstone Manufacturing, this premium hard aluminum truck bed cover delivers enhanced cargo security, all weather protection, rugged durability, and a sleek low profile appearance built for real world one-ton truck use.

Whether your truck is used for long material transport, maximum payload hauling, farm and ranch operations, commercial fleet work, gooseneck towing, or heavy-duty one-ton applications, Thunder Armor delivers dependable truck bed protection designed to match the capability of the 2011 RAM 3500 8' Long Bed.

Important: Thunder Armor for the RAM 3500 8' Long Bed does not work with drop-in bed liners. Remove drop-in liners before installation.

Why Choose the Thunder Armor Hard Folding Truck Bed Cover?

• Heavy Duty Aluminum Construction

  Premium grade aluminum panels engineered for the most demanding commercial, agricultural, and one-ton heavy-duty long bed truck use.

• Best in Class Low Profile Design

  Ultra low profile design sits virtually flush with your 2011 RAM 3500 bed rails across the full 8' Long Bed.

• Enhanced Cargo Security

  Secure latch system helps protect valuable tools, equipment, materials, and cargo across every inch of the 8' Long Bed.

• All Weather Truck Bed Protection

  Weather resistant perimeter seal system helps protect cargo from rain, snow, dust, dirt, and road debris.

• Quick No Drill Installation

  Installs in approximately 30 minutes using a no drill clamp mounting system.

• Full Truck Bed Access

  Folding panel design provides convenient access to your full 8' Long Bed while maintaining maximum hauling flexibility.

• Proudly Made in the USA

  Designed, engineered, sourced, and manufactured in the United States.

• Built for the Proven Fourth Generation RAM 3500 Long Bed

  The 2011 RAM 3500 carried the same 8' Long Bed rail geometry introduced with the 2010 fourth-generation redesign. Thunder Armor delivers the same precise fitment across the full 2010–2018 fourth-generation range, protecting the maximum capacity one-ton configuration built for operators who need every inch of bed length and every pound of payload their RAM 3500 can deliver.

• Platform Note

  The 2011 RAM 3500 uses fourth-generation bed rail geometry. This fitment is for 2010–2018 RAM 3500 trucks only. If you own a 2019 or newer RAM 3500, see the fifth-generation fitment pages.