At 270g, the Atom is the lightest road tubeless tire in the Hutchinson line up. Taking advantage of both the tubeless technology and added safety protection with sealant, the Atom is the perfect all around riding tire for both racing and training. Capable of running at 85 psi with out worries of pinching, gives the advantage of much more supple ride and better contact patch to the road. The slick competition profile delivers a very fast rolling tire with 127tpi casing. Carbon beads provide ride flat safety.