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TRP Spyre mechanical disc caliper, post mount

TRP brake caliper. Needs from your bike: Brake mount, front and Brake actuation. Provides: Brake pad shape (fitted calipers).

The TRP Spyre mechanical disc caliper, post mount is a brake caliper (component). It requires 2 things of a bike — Brake mount, front and Brake actuation — read from TRP Cycling. It provides Brake pad shape (fitted calipers) to the parts that mount on it. 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 — Brake mount, frontPost mount (74 mm)
Requires — Brake actuationMechanical (cable) disc
Provides — Brake pad shape (fitted calipers)Shimano B-type (Deore/Alivio/Acera/Altus/MT: B01S/B03S/B05S)

Brake mount, front and Brake actuation are safety-critical: a wrong answer could hurt you, so we say "fits" only when the bike's fact is confirmed by two independent sources. With one source the honest answer is "unknown"; with none it is "unknown — safety-critical".

Does this part fit my bike?
Find your bike under "Fits these bikes" below, or open your bike's "Front brake" 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

  • Post mount (74 mm)
  • Mechanical (cable) disc
  • Shimano B-type (Deore/Alivio/Acera/Altus/MT: B01S/B03S/B05S)

Needs from your bike: Brake actuation at the selected position: Mechanical (cable) disc · Brake mount at the selected position: Post mount (74 mm)

Provides: Brake pad shape at the selected position: Shimano B-type (Deore/Alivio/Acera/Altus/MT: B01S/B03S/B05S)

Brake caliper

Find this part

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

Fits these bikes

Front brake

Brompton C Line 12-speed (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Cable rim brake (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Canyon Grail CF SL 7 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Defy Advanced 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Fathom 29 2 (2022)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Glory Advanced (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Propel Advanced 2 (2027)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Reign 29 2 (2021)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Revolt Advanced 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Roam 2 Disc (2021)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Talon 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Talon E+ (2026)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant TCX Advanced Pro 2 (2023)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Trance X 29 2 (2022)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Kona Sutra (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

State Bicycle Co. Core-Line (2024)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Cable rim brake (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Surly Disc Trucker 700c (2024)unknown · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike Flat mount (single-source) · part Post mount (74 mm) — match with an adapter (adapter flat_mount → post_mount, extra_part)
  • Brake actuation (safety-critical): bike Mechanical (cable) disc (single-source) · part Mechanical (cable) disc — match

Downgraded to "unknown": every fact matches, but a safety-critical one is confirmed by a single source only — we say "fits" on a safety dimension only with two independent sources

Sources:

Tern GSD S10 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Tern Quick Haul D8 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Canyon Ultimate CF 7 (2025)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike Flat mount (single-source) · part Post mount (74 mm) — match with an adapter (adapter flat_mount → post_mount, extra_part)
  • Brake actuation (safety-critical): bike Hydraulic disc (single-source) · part Mechanical (cable) disc — mismatch

Sources:

Giant Escape 3 (2024)does not fit · confidence: single-source
Why? The facts we compared (2 dimensions compared)
  • Brake mount, front (safety-critical): bike Cantilever / V-brake posts (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation (safety-critical): bike Cable rim brake (single-source) · part Mechanical (cable) disc — mismatch

Sources:

See all 23 bikes

Rear brake

Brompton C Line 12-speed (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Canyon Grail CF SL 7 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Canyon Ultimate CF 7 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike Flat mount (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Defy Advanced 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Escape 3 (2024)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike Cantilever / V-brake posts (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Fathom 29 2 (2022)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Glory Advanced (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Propel Advanced 2 (2027)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Reign 29 2 (2021)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Revolt Advanced 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Roam 2 Disc (2021)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Talon 2 (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Talon E+ (2026)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant TCX Advanced Pro 2 (2023)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant Trance X 29 2 (2022)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Giant XTC Jr 24 (2015)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike Cantilever / V-brake posts (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Kona Sutra (2025)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Liv Flourish 2 (2017)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike Cantilever / V-brake posts (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

State Bicycle Co. Core-Line (2024)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike nothing on file · part Post mount (74 mm) — not on file
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — not on file

Sources:

Surly Disc Trucker 700c (2024)unknown — safety-critical · confidence: single-source We can't answer this yet, and this is one where a guess could hurt you.
Why? The facts we compared (2 dimensions compared)
  • Brake mount, rear (safety-critical): bike Flat mount (single-source) · part Post mount (74 mm) — mismatch
  • Brake actuation, rear (safety-critical): bike nothing on file · part Mechanical (cable) disc — 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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