Up until this point, the only way to get a pair of the new TIOGA POWERBLOCK tires was to purchase a complete 2009 REDLINE Flight bike; which were the first bikes to be spec'd with this modern-day treaded tire. But as of right now, the top-end S-Spec PowerBlock in sizes 20x2.1, 20x1.95, 20x1.75 and 20x1.60, as well as the standard PowerBlock in sizes - 20x1 1/8, 20 x 1 3/8 and cruiser sizes in 24 x 1.75 and 24 x 2.10 are available thru any Dealer who orders their gear from Seattle Bike Supply.
ABOUT THE POWERBLOCK: Development of the Tioga POWERBLOCK started in winter 2007, and a key part to the tire's design was disecting vital input from the Factory Redline team