Pirelli PZero Velo 4S Road Tire 700x28C Folding Clincher SmartNET Silica Aramid Fiber 127TPI Black CheckoutSpec= Bluebird The design fuses two of

The design fuses two of Zipp’s most advanced approaches

Air spring for progressive stroke on the big hits

}Chromag Mood DT Saddle - Chromoly Black/Grey

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A steel notched spring retainer/collar should be used on all spring rates 550 lbs or greater

Pirelli PZero Velo 4S Road Tire 700x28C Folding Clincher SmartNET Silica Aramid Fiber 127TPI Black CheckoutSpec= Bluebird The design fuses two ofHigh marks on all features: rolling, dry & wet grip, puncture protection, mileage, comfort. Its unique tread design is developed to shed water from your path even faster than the PZERO VELO. Wet or dry, even in cold conditions, the 4S will rise to the challenge. TECH SPECS Primary Color Black Bead Folding Tire Compound SmartNET Silica Tire PSI 100 Tire Technology Aramid Fiber TPI 127TPI Tire Type Clincher Tire Weight 250g Tire Width 28C Tire Width