Dunlop rears can be turned so you would get close to double the time on them. I would get them fitted the wrong way first as some of the tyre people associated with TDO's can be funny about turning tyres unless you have your own levers.
If your buying from holbeach, I'd ask for his recomendation on tyre compound as some of the newer tyres work better with soft compounds when it gets hotter. Dunlop suggest there endurance compound when the track temperature is low to counteract cold tear.
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