STX Inertia Road Folding Tire


Quick Overview

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 perform 8.12% better at cornering than our competitor’s 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
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Serfas® Tires are covered by our 30 Day Warranty which guarantees a product free of defects in material and/or workmanship up to 30 days after purchase. This warranty does not apply to damage due to heat, environmental factors, misuse, or negligence. *Tire purchase must be from authorized Serfas® retailer for eligibility.


  • Alchemy Compound For Low Rolling Resistance and World Class Grip
  • FPS Flat Protection System
  • Dual Density Tread
  • Smooth Tread Pattern For Ultimate Performance
  • 120 TPI 3 Layer Construction Provides Supple Ride


  • Bead: Folding
  • TPI: 120
  • Sizes:
    • 700 x 23
    • 700 x 25
    • 700 x 28
  • Pressure: 130 PSI
  • Weight:
    • (23) 222g
    • (25) 242g
    • (28) 312g

Additional information


700 X 23 Folding, 700 X 25 Folding


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