Hoosier R60B 6.0/11.0-5 Sprint Tire - Superior Dry Grip - Spec ClassWhen you're pushing a racing go kart to its absolute limits, the contact patch is the only thing keeping you off the barriers, which is why the Hoosier R60B 6. 0 11. 0 5 Sprint Tire is engineered for maximum dry track adhesion. Designed specifically for high speed sprint racing and spec tire classes, the R60B compound delivers an aggressive bite on corner entry and predictable slip angles on exit. Instead of fighting the chassis, drivers can trust the