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Round Alloy Seatmast Cap & 7mm Ears | 128x10mm

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Replacement Bontrager alloy seatmast compatible with all Trek road bikes with round seat masts.

  • 2-bolt design for independent set-back and tilt adjustment
  • 10mm offset only
  • 128mm length
  • Includes 7x7mm round rail clamp
  • Part number: W541053
Fixation TypeBolt
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