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Thomson Seatpost collar 34.9 mm

Thomson seat clamp. Needs from your bike: Seat clamp diameter.

The Thomson Seatpost collar 34.9 mm is a seat clamp (component). It requires 1 thing of a bike — Seat clamp diameter — read from Thomson. On every bike page its verdict is computed from those requirements against the bike's cited facts: when a fact is missing the answer is "unknown", never a guess.

Requires — Seat clamp diameter34.9 mm
Does this part fit my bike?
Find your bike under "Fits these bikes" below, or open your bike's "Seatpost" region page. The verdict there is computed from this part's requirements against the bike's cited facts — with its confidence and sources.
What does "does not fit" mean here?
That a fact on file for the bike contradicts a requirement of this part — a confident no, with both values shown.

Standards

  • 34.9 mm

Needs from your bike: Seat clamp diameter: 34.9 mm

Seat clamp

Find this part

Choose the right variant and check the fit for your bike.

Fits these bikes

Brompton C Line 12-speed (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Canyon Grail CF SL 7 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Canyon Ultimate CF 7 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Defy Advanced 2 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Escape 3 (2024)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Fathom 29 2 (2022)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Glory Advanced (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Propel Advanced 2 (2027)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Reign 29 2 (2021)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Revolt Advanced 2 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Roam 2 Disc (2021)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Talon 2 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Talon E+ (2026)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant TCX Advanced Pro 2 (2023)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant Trance X 29 2 (2022)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Giant XTC Jr 24 (2015)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Kona Sutra (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Liv Flourish 2 (2017)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

State Bicycle Co. Core-Line (2024)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

Tern GSD S10 (2025)unknown · confidence: single-source
Why? The facts we compared (1 dimension compared)
  • Seat clamp diameter: bike nothing on file · part 34.9 mm — not on file

Sources:

See all 23 bikes

Sources

The spec sheets we read. Every fact above cites one of them.

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