Don't pass these up if you're an athlete looking for a secret weapon. Spinergy is the exclusive distritutor of the IRC Wheelchair tires because we believe in the product. IRC has long been regarded as a super high quality tire. They bring a high-tech approach to their compounds; acheiving a superb balance of grip and low rolling resistance. We offer Exeracer Pro tire as an ideal pairing with all Spinergy sport wheels.