Knobbly motorbike tyres (Cholsey/Wallingford OX10)

Four knobbly off-road motorbike tyres, probably two front and two rear; sizes as follows: -
80/100-21
120/90-18
90/90-21
120/100-18.
These came to me as a kind of accident and I don't know their history: as far as I can see, they are in good order with lots of life in them.

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