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Trek Round Carbon Seat Mast Cap & 7mm Ears

$139.99 Model 11255
A mast cap available in two sizes and offsets for all Trek road bikes with round seat masts.
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Trek-compatible seat mast cap

Offered in white and black and a variety of lengths and offsets, the mast cap includes hardware compatible with round saddle rails only. 7x10mm carbon rail-compatible hardware sold separately.

Product details

  1. Ultra-light carbon construction
  2. Direct fit on all Trek road bikes with round seat masts
  3. Color matched for direct compatibility
  4. One bolt head design offers easy fore-aft and infinite angle adjustment
  5. Includes 7mm round saddle clamp ears, 10mm ears sold seperately

More options



Size 135mm x 5mm 135mm x 20mm 175mm x 5mm 175mm x 20mm
Length 135mm 135mm 175mm 175mm
Offset 5mm 20mm 5mm 20mm
Rail compatibility 7mm round 7mm round 7mm round 7mm round
Material Carbon Carbon Carbon Carbon
Weight 130g 130g 150g 150g

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