Srewart,
The MRF tyres like your attached photo are identical in appearance to the traditional brands. NDMS just stands for non directional mud and snow.
The importers into Australia (Agtyre at Moree) made enquiries for me some time ago about the 5 degree type mentioned in the MRF catalog. MRF said they still had them on their books but did not carry them but would do a run if there were sufficient orders - didn't say what were sufficient!
For our purposes, as I mentioned above, there seems no point in going to all that trouble because the readily available flat rim style are more than satisfactory.
In Bhutan earlier this year I noticed new Indian Army trucks with several sizes of traditional ND tread on them - all MRF.
Lang
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