30 Day Unconditional Guarantee
For Trek, Bontrager or Electra products, if for some reason you’re not 100% happy with your purchase, you can return it within 30 days for a refund — no questions asked!
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
- Ultra-light carbon construction
- Direct fit on all Trek road bikes with round seat masts
- Colour-matched for direct compatibility
- One bolt head design offers easy fore-aft and infinite angle adjustment
- Includes 7 mm round saddle clamp ears, 10 mm ears sold separately
More options
You might also like
30-Day Unconditional Guarantee
If for any reason you’re not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
Learn more
| 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 |
| Weight | 130g | 130g | 150g | 150g |