I have not seen these run in wheat straw. One of my customers is running them and is happy with the job that they do. However, it is not a bolt on deal. They do not fit the 24" standard disc. They do fit the 30" disc off of the 80 series and these will fit the 60 series. He does recommend mounting a deflector on the inside of the hood to help deflect the material down to the spreader discs.