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BAKFlip MX4 vs BAKFlip Fibermax

BAK makes some of the most popular hard-folding tonneau covers you can get for your truck. These covers share many features, but there are minor differences in materials, weight capacities, and more. To help you select the best tonneau cover for your needs, we compare two of BAK’s most popular truck bed covers: the MX4 and the Fibermax.

Shared Features

  • Hard-Folding Tonneau Cover: Hard-Folding Tonneau Cover: The covers are made of hard materials for superior security. They open by folding toward the cab.
  • Locks with Tailgate:Locks with Tailgate: Both covers lock with your truck’s tailgate, so if the cover is closed and your tailgate is shut and locked, your bed is secure.
  • Accessories:Accessories: The MX4 and Fibermax mount between your bed rails, leaving the stake hole pockets free for truck racks, tie downs, and more.
  • Water Resistant:Water Resistant: Water is channeled along the tonneau cover rails and drained out of the bed via tubes.
  • Easy to Operate:Easy to Operate: Pull the string to release the latch and open the tonneau cover.
Materials
Materials

The MX4 has top panels made of durable, corrosion-resistant aluminum.

Materials
Materials

The top panels on the Fibermax are made of FRP (fiberglass reinforced polymer), which is resistant to dents, dings, and scratches.

Weight Capacity
Weight Capacity

The MX4 can support up to 400 pounds of evenly distributed weight.

Weight Capacity
Weight Capacity

The Fibermax can support up to 300 pounds of evenly distributed weight.

Finish
Finish

The MX4 has a matte-black finish.

Finish
Finish

The Fibermax has a textured, gloss-black finish.

Tailgate Seal
Tailgate Seal

The dual-action tailgate seal on the MX4 allows you to close your tailgate whether the cover is open or shut.

Tailgate Seal
Tailgate Seal

The flap seal on the Fibermax overlaps your tailgate, so the tailgate needs to be shut before the cover is closed.

If you have questions about these or any other tonneau covers, chat or call our product experts.