Specialized Seatpost Clamp 30.6mm OEM Diverge Crux

Specialized Factory Replacement  Alloy Seatpost Clamp

30.6mm ID – Road, Gravel & E-Road Platforms

This Specialized factory replacement round alloy seatpost clamp collar design and a 30.6mm internal diameter, providing increased clamping surface and improved seatpost security on a wide range of Specialized road, gravel, and e-road bikes.

Originally spec’d on MY23 Diverge models, this clamp is manufactured to Specialized OEM specifications and restores factory-correct fit, finish, and torque performance. The collar design helps distribute clamping force evenly, reducing the risk of seatpost slip—especially on carbon frames and longer-travel gravel bikes.

Features & Specifications

• Genuine Specialized OEM replacement

• Extra-tall collar for increased clamping surface

• Round alloy clamp body

• Inner Diameter: 30.6mm

• Bolt Material: Steel

• Maximum Torque: 55 in-lbf (6.2 Nm)

• Designed for carbon and alloy frames

• Direct factory-fit replacement

What’s Included

• (1) Specialized round alloy seatpost clamp

• Integrated steel clamp bolt
  (As supplied by Specialized OEM)

Compatibility Notes

• Designed for frames requiring a 30.6mm seatpost clamp

• Not compatible with frames using integrated or wedge-style seat binders

• Always verify seatpost clamp diameter before ordering

OEM Compatibility

Used across a wide range of Specialized road, gravel, and e-road platforms, including but not limited to:

Diverge (2017–2026)
Carbon, E5, Expert, Pro, Comp, Framesets

Crux DSW (2025–2026)
DSW Frameset & Complete Builds

Tarmac SL6 (2019–2023)
Sport, Comp, Disc Models

Turbo Creo SL / Turbo Vado SL (2020–2023)
Carbon & E5 Variants

Chisel (2018–2020)
Framesets & Complete Bikes

(See full compatibility list above for complete model-year coverage)

Recommended Use

• Seatpost clamp replacement

• Frame builds and restorations

• Fixing seatpost slip

• OEM-correct service or warranty replacement

Why Buy OEM?

Using genuine Specialized seatpost hardware ensures:

• Correct clamp diameter and torque

• Even load distribution on carbon frames

• Secure, creak-free seatpost retention

• Factory-correct appearance and fit

• Long-term durability and resale value

A genuine Specialized OEM seatpost clamp—ideal for maintaining secure, factory-correct seatpost fit across modern Diverge, Crux, and Tarmac platforms.