I have a L3830 with R4 loaded rear tires and use a 72" MMM to mow my yard with. I do not mow when the ground is wet. I think the R4 tires do not cut or scuff as bad as the turf tires I had on the other tractor. The hydro transmission makes turning without cutting, digging in or scuffing the lawn an easy task if you lift your foot. I talked to several professional landscapers prior to ordering with the loaded R4's. They advised they liked the R4's better than the turfs. I can not address R4's not working with a MMM on a L3130. I am sure your dealer can answer this. I was advised the "Galaxy" tires would not work with a MMM.