Product Description
The Trek SLR Ultra-Light Carbon Seatmast Cap was originally developed for the exceptionally lightweight Émonda SLR 10 and is Trek’s lightest seatmast cap option for compatible road bikes using a round Trek seatmast.
This upgraded SLR version is lighter than Trek’s standard round carbon seatmast cap and features a one-bolt rotary head design for easy fore/aft positioning and virtually infinite saddle-angle adjustment.
This multi-variation listing includes all four length and offset configurations. Each cap is supplied with 10mm oval saddle rail clamp ears for compatible oversized carbon saddle rails.
Available Variations
| Size |
Length |
Offset |
Claimed Weight |
| 135mm x 5mm |
135mm |
5mm |
117g |
| 135mm x 20mm |
135mm |
20mm |
117g |
| 175mm x 5mm |
175mm |
5mm |
134g |
| 175mm x 20mm |
175mm |
20mm |
134g |
Key Features
- Genuine Trek SLR replacement seatmast cap
- Ultra-light carbon construction
- Lighter than Trek’s standard round carbon seatmast cap
- Originally developed for the Émonda SLR 10
- Direct fit for compatible Trek road bikes using round seatmasts
- One-bolt rotary head design
- Easy fore/aft saddle adjustment
- Infinite-angle saddle adjustment
- Includes 10mm oval rail clamp ears
- Four length and setback options available
Specifications
- Brand: Trek
- Series: SLR Ultra-Light
- Product Type: Seatmast Cap
- Material: Carbon
- Length Options: 135mm / 175mm
- Offset Options: 5mm / 20mm
- Saddle Clamp Design: Single Bolt / Rotary Head
- Included Rail Clamp: 10mm Oval
- 135mm Claimed Weight: 117g
- 175mm Claimed Weight: 134g
Rail Compatibility
These seatmast caps are supplied with 10mm oval saddle clamp ears, intended for compatible oversized saddle rails.
7mm round rail clamp ears are not included and must be purchased separately if you intend to use a saddle with standard 7x7mm round rails.
Confirm your saddle’s rail dimensions before ordering.
Compatibility
Designed as a direct-fit replacement for compatible Trek road bikes equipped with round seatmasts.
Because Trek has used multiple seatpost and seatmast systems across different generations, confirm that your bicycle uses the round Trek seatmast design and select the appropriate length and offset for your fit.
Included
- One Trek SLR Ultra-Light carbon seatmast cap in selected size
- Rotary saddle clamp / head hardware
- 10mm oval saddle rail clamp ears
Not Included
- 7mm round saddle rail ears
- Saddle
- Additional installation hardware unless pictured
Condition
