Swapping out traditional round wire combine concaves for our innovative bar-and-grate style modular MAD Concaves™ results in more efficient threshing, getting your grain out of the head and into the hopper quicker for decreased rotor loss and less dockage. This means higher quality crops and more money in your pocket.

Our fast and easy-to-change modular designs allow you to quickly swap out inserts in minutes, making it way easier to customize your concaves to your crop for the best results possible. Plus, you’ll save valuable time, which is critical in a busy harvest season. 

Standard MAD Concaves John Deere Set Up for STS & S Series Combines

Available for S and STS Series combines.

The numbers .225, .300, and .375 represent the measurement of the gap between the bar; the gap being .225 of an inch for example.

Additional Information & Tip


        • In tough canola conditions, you may need to put a .375 in the first position & finger grate in the second position.

        • In high-yielding canola, you may need to replace a .375 with a .435.

      • If harvesting multiple crops but not harvesting corn, Finger Grates in position 1 and .375 in position 2 is an option for soybeans in certain conditions.



      MAD Concaves Configuration & Combine Settings Guide for John Deere STS & S Series

      *Recommendations may change by crop conditions and climate