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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. One bolt head design offers easy fore-aft and infinite angle adjustment
  4. Does not include saddle clamp ears - 7mm round and 10mm oval ears sold separately
  5. Go green and save green - Zero packaging means zero waste and zero extra cost

More options



Size 135mm x 20mm 175mm x 5mm
Length 135mm 175mm
Offset 20mm 5mm
Rail compatibility 7mm round 7mm round
Material Carbon Carbon
Weight 130g 150g
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Weights are based off Trek pre-production products at time of publication. Weights may vary in final production.

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