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30.9 mm Seatposts
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Carbon Fiber Bike Seatpost 27.2/30.9/31.6mm, UD Matte for MTB/Road(31.6x350mm 63D) MOBFOCOBM-31.6X350MM63D
Premium UD carbon fiber construction offers optimal strength-to-weight ratio Multiple diameter options (27.2/30.9/31.6mm) fit most bike frames Matte finish resists scratches and maintains sleek appearance Vibration-damping properties enhance riding comfort Precision engineering ensures perfect seat alignment
£63.14
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Crankbrothers Highline 7 30.9 150 mm
SeatpostAdjustment options: SteplessInstallation: SimpleAdjustment range: 150 mmDiameter: 30.9 mm
£180.49

KS Rage Is Telescopic Seatpost Black/Silver Ø 30.9 mm, 388 mm 140907385
Hard-anodized black upper tube Precisely milled aluminum immersion tube with integrated sealing sleeve Micro-adjustable seat clamp with black steel screws Polycarbonate (pc) pull connectors for internal cable routing Air-sprung, hydraulic cartridge body with open bath
£188.95
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Ritchey WCS Link Seatpost: Blatte 400mm x 30.9mm B01NCRTJGM
Designed to devour countless miles of gravel, enjoy endless ribbons of tarmac, conquer rowdy singletrack and survive punishing cyclocross courses, the 7050 alloy WCS Link seatpost represents Ritchey’s understanding of, and commitment to, great ride experiences. The WCS Link features Ritchey’s legendary Two-Bolt seatpost system design, a 20mm offset, and the patented LINK reversable clamp that fits all standard saddle rail designs. Built from life, the WCS Link ensures a lifetime of the experiences of a lifetime. Diameter: 27.2, 30.9, 31.6mm. Total length: 350, 400mm (including 100mm of minimum insert). Offset: 20mm.
£72.96
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