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Old June 10th, 2018, 10:45 PM   #22
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
Thickness of tread-blocks on autos are about 3x as tall as on moto tyres, ~8-9mm. Try riding dual-sport tyres on track and you get too much squirming that distorts contact-patch detrimentally. Shaving auto tyres or dual-sport tyres to 1/3rd depth gets them to moto race tyre depth for maximum traction. It's controlled uniform flex of the rubber that generates highest grip, which is why slicks of same compound sticks better than treaded version of same tyre (not contact surface-area, which is pretty much the same).

I can go through a whole set of brand-new race-slicks in single day on my CBR. The 2nd to last session, they have worse grip than 9-yr old street tyres on the Ninjette. The last session with texture of cords showing has as much grip as smearing peanut butter all over your tyres. That's brand-new 2018 tyres in the morning too!
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