The Serfas STX Inertia Folding Road Tire features a smooth tread constructed using our high performance Alchemy Compound for lower rolling resistance and world class grip.

Comprehensive testing at Wheel Energy of Finland, an independent tire laboratory, found Serfas Inertia tires to perform8.12% better at corneringthan our competitors most comparable best selling road bike tire.

• Serfas FPS Flat Protection
• Dual Density Tread Compound
• 120 TPI 3-Layer Casing
• Low Rolling Resistance Alchemy Compound w/ World Class Grip