![]() ![]() ![]() In the rear, Bridgestone engineers shrunk the size of the silica molecules, providing more silica for the same surface area. With two different compounds in front and three in the rear, the S22s are able to perform over a wider range of temperatures. The latest in B-Stone’s street-focused sportbike tire lineup, the S22 takes the popular S21 and makes it better through the use of new compounds, new tread patterns, and more. If the Bridgestone Battlax Hypersport S22 sounds familiar to you, maybe it’s because our own Evans Brasfield just finished sampling them at the Jerez circuit. Full silica compounds also ensure fast warm-up times, and Pirelli’s Cap&Base structure on the rear tire help give it stability and grip while cornering and accelerating. A flexible and responsive carcass help transmit feedback to the rider while also helping the tire get up to temperature quickly. What separates the IV from previous versions is Pirelli’s continual refinement of the tire’s profile, based on lessons learned as the spec tire provider of the World Superbike championship. ![]() Pirelli says each size of the Diablo Rosso IV has been “developed in a bespoke way according to the characteristics and needs of each machine,” factoring in the different weights and power outputs of each bike. This latest iteration continues the family’s supersport-inspired performance delivered in a package entirely at home on the street or the occasional trackday. Since it wears the roman numeral IV on its sidewall, you’ve likely guessed that Pirelli has developed three previous versions of the Diablo Rosso tire. ![]()
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