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Trek Colour-Matched Matte Carbon Seat Mast Cap & 7 mm Round Ears Metallic Gunmetal 135mm x 20mm


Availability: Low Stock

A mast cap available in two sizes and offsets for all Trek road bikes with round seat masts.

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. Colour-matched for direct compatibility
  4. One bolt head design offers easy fore-aft and infinite angle adjustment
  5. Includes 7 mm round saddle clamp ears, 10 mm ears sold separately


Size 135mm x 5mm 135mm x 20mm 175mm x 5mm 175mm x 20mm
Length 135 mm 135 mm 175 mm 175 mm
Offset 5mm 20mm 5mm 20mm
Rail compatibility 7 mm round 7 mm round 7 mm round 7 mm round
Material Carbon Carbon Carbon Carbon