Specialized

30.6mm STC Seatpost Clamp with Integrated Rack Mounts

The STC 30.6mm Seatpost Clamp with Rack Mounts adds rear rack mounting capability to compatible Specialized road and gravel bikes. The round alloy collar replaces the existing seatpost clamp and incorporates threaded rack mounting points directly into the binder, providing a clean and simple way to mount a compatible rear rack.

The clamp features a 30.6mm inner diameter and steel mounting bolts. Maximum recommended torque is 53 in-lbf (6 Nm).

Features

• Alloy seatpost clamp with integrated rack mounts
• 30.6mm inner diameter
• Provides rear rack mounting points
• Rack bolts thread directly into the seat clamp binder
• Steel mounting bolts included
• Maximum torque: 53 in-lbf (6 Nm)
• Designed for compatible Specialized road and gravel bikes

Compatible Specialized Models This 30.6mm seatpost clamp is listed for use with the following Specialized road and gravel bikes:
Turbo Creo

• 2027 Turbo Creo 2 Comp E5
• 2026 Turbo Creo 2 Comp E5
• 2025 Turbo Creo 2 Comp E5
• 2024 Turbo Creo 2 Comp E5
• 2023 Turbo Creo SL Comp E5
• 2022 Turbo Creo SL Expert EVO
• 2022 Turbo Creo SL Expert
• 2022 Turbo Creo SL Comp E5
• 2022 Turbo Creo SL Comp Carbon EVO
• 2022 Turbo Creo SL Comp Carbon
• 2022 S-Works Turbo Creo SL EVO
• 2022 S-Works Turbo Creo SL
• 2021 Turbo Creo SL Expert EVO
• 2021 Turbo Creo SL Expert
• 2021 Turbo Creo SL Comp E5
• 2021 Turbo Creo SL Comp Carbon EVO
• 2021 Turbo Creo SL Comp Carbon
• 2021 S-Works Turbo Creo SL EVO
• 2021 S-Works Turbo Creo SL
• 2020 Turbo Creo SL Expert EVO
• 2020 Turbo Creo SL Expert
• 2020 Turbo Creo SL Comp E5
• 2020 Turbo Creo SL Comp Carbon EVO
• 2020 Turbo Creo SL Comp Carbon
• 2020 S-Works Turbo Creo SL Founder's Edition
• 2020 S-Works Turbo Creo SL

Diverge

• 2027 Diverge 4 Pro
• 2027 Diverge 4 Pro LTD
• 2027 Diverge 4 Expert
• 2026 Diverge 9R
• 2026 Diverge 4 Sport Carbon
• 2026 Diverge 4 Sport Alloy
• 2026 Diverge 4 Pro
• 2026 Diverge 4 Pro LTD
• 2026 Diverge 4 Expert
• 2026 Diverge 4 Comp Carbon
• 2026 Diverge 4 Comp Alloy
• 2026 Diverge 3 Alloy
• 2025 Diverge E5 Elite
• 2025 Diverge E5
• 2025 Diverge Comp E5
• 2025 Diverge Comp Carbon
• 2024 Diverge Elite E5
• 2024 Diverge E5
• 2024 Diverge Comp E5
• 2024 Diverge Comp Carbon
• 2023 Diverge Expert E5 EVO
• 2023 Diverge Elite E5
• 2023 Diverge E5 EVO Frameset
• 2023 Diverge E5
• 2023 Diverge Comp E5
• 2022 S-Works Diverge
• 2022 S-Works Diverge Frameset
• 2022 Diverge Sport Carbon
• 2022 Diverge Pro Carbon
• 2022 Diverge Expert E5 EVO
• 2022 Diverge Expert Carbon
• 2022 Diverge Elite E5
• 2022 Diverge E5 EVO Frameset
• 2022 Diverge E5
• 2022 Diverge Comp E5
• 2022 Diverge Comp Carbon
• 2022 Diverge 9R Frameset
• 2021 S-Works Diverge
• 2021 S-Works Diverge Frameset
• 2021 Diverge Sport Carbon
• 2021 Diverge Pro Carbon
• 2021 Diverge Pro Carbon Campagnolo LTD
• 2021 Diverge Expert E5 EVO
• 2021 Diverge Expert Carbon
• 2021 Diverge Elite E5
• 2021 Diverge Comp E5 EVO
• 2021 Diverge Comp E5
• 2021 Diverge Comp Carbon
• 2021 Diverge Base E5
• 2021 Diverge Base Carbon
• 2020 S-Works Diverge Frameset
• 2020 S-Works Diverge
• 2020 Diverge X1
• 2020 Diverge Sport
• 2020 Diverge Pro
• 2020 Diverge Expert
• 2020 Diverge Elite E5
• 2020 Diverge E5
• 2020 Diverge Comp E5
• 2020 Diverge Comp
• 2019 S-Works Diverge Frameset
• 2019 Men's S-Works Diverge
• 2019 Men's Diverge Sport
• 2019 Men's Diverge Pro
• 2019 Men's Diverge Expert X1
• 2019 Men's Diverge E5 Elite
• 2019 Men's Diverge E5 Comp
• 2019 Men's Diverge E5
• 2019 Men's Diverge Comp
• 2019 Men's Diverge
• 2019 Women's Diverge Sport
• 2019 Women's Diverge Expert X1 Mixtape
• 2019 Women's Diverge Expert X1
• 2019 Women's Diverge E5 Elite
• 2019 Women's Diverge E5 Comp
• 2019 Women's Diverge E5
• 2019 Women's Diverge Comp
• 2019 Women's Diverge