What seatpost diameter does a Specialized Tarmac SL8 (2024 on) use?
The seatpost fitment standard on a Specialized Tarmac SL8 (2024 on), and how to pick the right part.
This frame's fitment
| Frame | Specialized Tarmac SL8 (2024 on) |
|---|---|
| Seatpost diameter | 27.2 mm |
| Diameter | 27.2 mm |
| Typical class | the de facto standard on modern road and gravel frames, and many hardtail and lightweight full-suspension frames |
The Specialized Tarmac SL8 uses an integrated IS42 upper headset for the 28.6 mm steerer, a 27.2 mm class seatpost, a 12x100 front thru-axle and a braze-on front derailleur.
Specialized fits its own aero-shaped post, so the 27.2 mm figure describes the class, not a round Specialized post. The SL8 bottom bracket is a BSA threaded shell, covered on its own page.
The part to buy
Search Amazon for 27.2 mm seatpost for your Specialized Tarmac SL8 (2024 on)affiliate searchFind 27.2 mm seatpost for your Specialized Tarmac SL8 (2024 on) on eBayaffiliate
Related fitment pages
27.2 mm seatpost27.2 mmBottom bracket for Specialized Tarmac SL8 (2024 on)same frame, BB shellHeadset on a Specialized Tarmac SL8 (2024 on)same frame27.2 mm seatpost on a Trek Emonda SLR (2024 on)same standard, another frame
SOURCES: Sheldon Brown, Seatpost Size Database · BikeRadar, Bike seatposts explained: diameters, materials, lengths · Park Tool, Standardized Headset Identification System (SHIS) · BikeRadar, Road bike axle standards: the complete guide