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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
Challenge has developed a new technology applied to handmade construction
For perfect tubeless setup use Challenge Smart Tubeless Sealant
The new XP series adds additional sidewall and tread protection Xtra Protection (XP) for greater durability
320TPI sealed corespun cotton casing with natural rubber SmartSoft Compound tread and a Latex Inner Tube with 60mm valve stem
ammonia free formula can seal up to 6mm cuts
GRAVEL GRINDER Pro - Handmade Tubeless Tubular inflation/tubeless Challenge has developed a newMulti Purpose with Bite Gravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip. This handmade PRO version combines a supple, 260TPI Super Polyester casing
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