Challenge's Grifo Team 33 Tubular excels in snow, mud, grass and firm dirt thanks to a tread with excellent pedaling, cornering and braking traction. The Grifo also has a puncture-resistant layer beneath the tread. And, it's built on their light and supple 320tpi hand-made SuperPoly casing with polyester-reinforced sidewalls for excellent durability. The integrated latex tubes are lighter, thinner, and more flexible than butyl tubes, increasing your comfort, lowering rolling resistance, and helping to prevent flats.
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