Brompton Bicycle sustainability score: 51/100
Better than 91% of Electronics / Hardware
Leading practice starts at 60. The highest score on SINK is 71.
Brompton is a British bicycle manufacturer founded in 1976, headquartered in Brentford, specialising in lightweight folding bikes. Listed on the London Stock Exchange and B Corp certified, it operates a primary factory in Greenford and is expanding to Ashford.
More about Brompton Bicycle
Known for design longevity and repairability, it competes in the premium folding segment globally.
Founded 1976Head office Brentford, United KingdomStaff ~800Revenue ~£123M (~$153M)Website ↗
Brompton has built credible climate governance and waste reduction programmes backed by B Corp certification, but its emissions trajectory worsened in FY2024 due to e-bike mix and air freight. Supply chain dominates footprint at 97%, yet Scope 3 targets remain intensity-based rather than absolute. A controversial new factory approved over Kent Wildlife Trust objections signals unresolved nature risks.
Brompton Bicycle scores 51/100 (Making progress) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified May 2026.
That places Brompton Bicycle joint 129th of 1,023 companies scored, and joint 4th of 46 in Electronics / Hardware.
What is Brompton Bicycle doing well, and where does it fall short?
Strongest on Transparency & Accountability and Controversies & Red Flags (7/10, 7/10). Weakest on Emissions Trajectory and Nature & Biodiversity Impact (4/10, 4/10).
Where Brompton Bicycle lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Whether its emissions are fallingShow a year-on-year fall in its total emissions.
- Its effect on natureMeasure its effect on nature and have it independently verified.
- Emissions from its supply chainMeasure most of its supply-chain (Scope 3) emissions.
Every question that lost points
- Emissions from its own operations6/10Its own emissions aren't independently verified or tracked over several years.
- Emissions from its supply chain5/10Most of its supply-chain (Scope 3) emissions aren't measured.
- Whether its emissions are falling4/10No evidence of a year-on-year fall in its total emissions.
- How clean its energy is6/10Less than 90% of its energy shown to be renewable.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste6/10No verified figures for reuse and recycling across the business.
- Its effect on water5/10No measured water footprint with reduction targets.
- Its climate targets6/10Its targets aren't validated by the Science Based Targets initiative.
- How openly it reports7/10No annual impact report, or no pay linked to climate targets.
- Its record on controversies7/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Brompton Bicycle's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Brompton Bicycle's score changed?
Brompton Bicycle's score has been reviewed 2 times and currently stands where it started, at 52.
- 52 → 5225 April 2026
Session 2a cleanup: recomputed performance from sum(questions[].score). performance 57→56, score 52→51.
- Scored 529 April 2026
Initial score at platform launch
What evidence is Brompton Bicycle's score based on?
10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
20% of them were published by Brompton Bicycle itself; the rest come from independent sources.
Scored on 9 April 2026 under an earlier version of our method. We're re-checking it under the current method.
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Brompton Bicycle compare with other electronics / hardware companies?
Where Brompton Bicycle sits among electronics / hardware peers.
Among the 46 major electronics / hardware brands we've scored, Brompton Bicycle is tied =4th of 46, with 1 other.
Who scores higher in Electronics / Hardware?
The 3 companies in the sector scoring nearest above Brompton Bicycle.
Fairphone tracks emissions across operations and supply chain with third-party assurance, but total emissions rose 78% year-on-year despite 41% sales growth, and it missed its 12% 2025 reduction target.
See the breakdown →Vaisala's total footprint fell 11% in 2025 to about 92,000 tCO2e after three flat years, and all its purchased electricity is renewable.
See the breakdown →Computacenter has delivered genuine Scope 1 & 2 carbon neutrality since 2022 and holds SBTi-validated targets.
See the breakdown →Which companies moved this week, and why.
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