You can get pirelli super corsa's in nsr sizes, (got em on mine ), i only use it for trackdays now so wear rate's not a problem for me, having said that if you dont use it every day, may not be any hassle, the tyre that seems to do the job well, both track and road is bridgestone bt090, i think metzeller have just brought out something in nsr sizes, so might be worth looking at them as well.
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Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto