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The Castelli Nano Flex 3G Leg Warmers are a stalwart of your winter cycling kit – rain repellent
preventing the front wheel from being too far in front of the rider
adjustable pins - 9 per side (mounted from back)
Color: Gold
CushCore Gravel - CX Tyre Insert Set BackInStock-02-04-2026 The Castelli Nano Flex 3GAn ultra lightweight insert that reduces fatigue, improves cornering, and helps prevent flats. HOW IT WORKS Not all tyre inserts are created the same. CushCore is no ordinary tyre insert and is based on a new concept, tyre suspension. Any suspension system has a spring and a damper, and with CushCore, pressurised air in the tyre is the spring and the CushCore tyre insert is the damper. Like traditional suspension, a constant damping force wouldn't