Front brake parts for the Brompton C Line 12-speed (2025)

We have not verified this bike yet

2 of the 14 measurements are on file; 0 confirmed by two independent sources. Without enough evidence, fit stays “unknown.”

Only universal parts (lube, tools, bar tape) are offered for this bike until verification.

Brompton C Line 12-speed (2025)

The front brake of the Brompton C Line 12-speed (2025): 3 slots — Brake caliper, Brake rotor and Brake pads. 3 fit facts on file for this region. The parts menu below lists every catalogued part that belongs here with its computed verdict — fits, fits with adapter, does not fit or unknown — and why.

Rotor interface (hubs)	No rotor interface (rim brake) (single-source)
Brake actuation	Cable rim brake (single-source)
Brake pad shape (fitted calipers)	Rim pads: Brompton dual-pivot caliper (single-source)

What does "unknown" mean on this page?: That we do not have, on file, the bike measurement this part needs. It is not a quiet "yes": until the measurement is on file, we do not sell the part for this bike.

Slots in this region

Brake caliper
Brake rotor
Brake pads

SRAM CenterLine rotor 180 mm, Center Lock
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part Center Lock — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 180 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine Rotor — RT-CLN-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine rotor 200 mm, 6-bolt
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part 6-bolt (ISO) — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 200 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine Rotor — RT-CLN-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine rotor 220 mm, 6-bolt
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part 6-bolt (ISO) — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 220 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine Rotor — RT-CLN-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine X rotor 140 mm, Center Lock
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part Center Lock — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 140 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine X Rotor — RT-CLN-X-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine X rotor 160 mm, 6-bolt
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part 6-bolt (ISO) — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 160 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine X Rotor — RT-CLN-X-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine X rotor 160 mm, Center Lock
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part Center Lock — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 160 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine X Rotor — RT-CLN-X-A2 (tier 1, read 2026-08-21)
View specifications
SRAM CenterLine X rotor 180 mm, 6-bolt
Brake rotor
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)
- Rotor interface (hubs) (safety-critical): bike No rotor interface (rim brake) (single-source) · part 6-bolt (ISO) — mismatch
- Maximum rotor, front (safety-critical): bike nothing on file · part ≥ 180 mm — not on file
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- SRAM — CenterLine X Rotor — RT-CLN-X-A2 (tier 1, read 2026-08-21)
View specifications
SRAM G2 RS disc brake (caliper + lever)
Brake caliper
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 Hydraulic disc — mismatch
Sources:
- SRAM — G2 RS disc brake — DB-G2-RS-A2 (service specifications) (tier 1, read 2026-08-21)
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
View specifications
TRP Spyre mechanical disc caliper, post mount
Brake caliper
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:
- TRP Cycling — Spyre — mechanical disc brake caliper (tier 1, read 2026-08-21)
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
View specifications
Shimano K-Type resin disc brake pads
Brake pads
does not fit · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Brake pad shape (fitted calipers) (safety-critical): bike Rim pads: Brompton dual-pivot caliper (single-source) · part Shimano K-type (2019+ 2-piston XTR/XT/SLX/Deore: K02S/K03S/K04Ti/K05S) or Shimano L-type (flat-mount road/gravel 2-piston: L02A/L03A/L04C/L05A) — mismatch
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- MEC — Shimano K-Type Resin Disc Brake Pads — MEC listing (tier 2, read 2026-08-21)
View specifications
Shimano L-Type metallic disc brake pads (finned)
Brake pads
does not fit · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Brake pad shape (fitted calipers) (safety-critical): bike Rim pads: Brompton dual-pivot caliper (single-source) · part Shimano L-type (flat-mount road/gravel 2-piston: L02A/L03A/L04C/L05A) or Shimano K-type (2019+ 2-piston XTR/XT/SLX/Deore: K02S/K03S/K04Ti/K05S) — mismatch
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- MEC — Shimano L-Type Metallic Disc Brake Pads — MEC listing (tier 2, read 2026-08-21)
View specifications
Shimano M70T4 V-brake pads
Brake pads
does not fit · confidence: single-source
Why? The facts we compared (1 dimension compared)
- Brake pad shape (fitted calipers) (safety-critical): bike Rim pads: Brompton dual-pivot caliper (single-source) · part Rim pads: V-brake / linear-pull threaded stud (M70T4 / S70C, 70 mm) — mismatch
Sources:
- Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)
- MEC — Shimano M70T4 V-Brake Rim Brake Pads — MEC listing (tier 2, read 2026-08-21)
View specifications

Sources

Brompton Bicycle — C Line — 12-speed — technical specifications (tier 1, read 2026-08-21)

Slots in this region

Parts menu — 12 parts

Sources