Has anyone had any problems with Michlin Agilis cross climate on mud/grass?
I copied this picture from the California forum where he said he had to be towed cause the mud just stuck making them like summer tyres.
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Although it doesn't answer the question I'd have dropped the tyre pressures down to 18 - 20 PSI to give a bigger contact patch, the deforming of the tyre would also help it to self clean.