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The Serfas STX Inertia Folding Road Tire is constructed using our Alchemy Compound for lower rolling resistance and world class grip.

Independent testing conducted at Wheel Energy of Finland provided data showing Serfas STX Inertia tires as performing 8.12% better on cornering than the best selling road bike tire on the market.

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

Features:

• Utilizes Our Alchemy Compound For Lower Rolling Resistance and World Class Grip
• FPS (Flat Protection System)
• Dual Density Tread
• Smooth Tread Pattern For Ultimate Performance
• 120 TPI 3 Layer Construction

Specs:

• Bead: Folding
• TPI: 120
• Sizes Available: 700 x25
• Pressure: 130 PSI