Market evolution: Gears and sprockets (CN 848390) — 2015–2025

Introduction

This report examines the EU's external trade in goods classified under Combined Nomenclature code 848390 — a broad category covering toothed wheels, chain sprockets, ball screws, couplings, and other transmission elements and parts of heading 8483. These components are essential inputs for automotive, industrial machinery, aerospace, and renewable energy sectors. Over the 2015–2025 period, the EU's position in this market has undergone significant structural change: while the bloc has remained a net exporter, the gap has narrowed considerably as import volumes surged, particularly from Asia. The data reveal a story of rising unit values, shifting trade geography, deepening integration into global supply chains, and growing concentration of import sources — all set against a backdrop of successive macroeconomic shocks and evolving industrial policy.

The analysis draws on trade data spanning 2015–2025 at annual frequency, covering overall trade flows, partner breakdowns, concentration metrics, volatility indicators, and vulnerability measures.

1. Imports surged faster than exports, compressing the EU's trade surplus despite strong export growth

The EU maintained a trade surplus throughout the period, but its composition changed dramatically

The EU has been a persistent net exporter of CN 848390 products, recording a trade surplus of €747 million in 2015 that grew modestly to €768 million by 2025. However, this headline stability masks very different growth trajectories on each side of the balance. Over the full period, EU exports grew by 54.8% in value (from €1.84 billion to €2.84 billion), while imports expanded by 90.6% (from €1.09 billion to €2.08 billion). The surplus hit a peak of over €1.02 billion around 2017–2018 before narrowing, indicating that the import acceleration has been a more recent phenomenon.

Export growth was overwhelmingly driven by price, not volume

A striking feature of the period is the divergence between value and volume on the export side. While export values rose by 54.8%, export quantities grew by only 3.0% (from 138,387 tonnes to 142,608 tonnes). The implied export unit value surged by 50.2%, from €13,273/t to €19,943/t. This suggests that the EU has been moving up the value chain within this product group — exporting fewer tonnes but at substantially higher prices — or that input costs and inflation have been passed through into export prices.

Import growth was more balanced between volume and price

On the import side, quantities grew by 74.9% (from 163,687 tonnes to 286,355 tonnes) and values by 90.6%, implying a more modest unit value increase of just 8.9% (from €6,656/t to €7,251/t). The EU thus imports substantially more tonnage than it exports, but at roughly one-third the unit price — a pattern consistent with the importation of standard, lower-specification components and the export of higher-precision, engineered transmission parts.

2. Trade geography shifted decisively toward Asia, with China and India emerging as dominant and fast-growing partners

China consolidated its position as the EU's largest import source, more than doubling its share

Among import partners, China stands out as the most significant story. EU imports from China rose from €281 million in 2015 to €781 million in 2025, an increase of 177.6%. China's import share grew correspondingly, making it by far the single largest source of these components. This mirrors the broader pattern of Chinese manufacturing upgrading and competing in mid-technology industrial goods.

India experienced the fastest import growth among major partners

India's role expanded even more dramatically in relative terms: EU imports from India grew from €64 million to €232 million (+264.4%). This surge reflects India's growing role as an alternative manufacturing base for industrial components, potentially accelerated by supply-chain diversification efforts away from China.

The United States remained the EU's top export destination, but India and the UK grew fastest

On the export side, the United States remained the largest single market, absorbing €675 million in 2025 (up 59.4% from €423 million). China was second at €511 million (+23.8%), followed by the United Kingdom at €247 million (+87.6%). Notably, EU exports to India grew 114.4%, suggesting that India's expanding industrial base is creating demand for both lower-cost imported inputs and higher-specification European components.

Germany dominated intra-EU trade flows, while Poland's import growth was exceptional

Within the EU, Germany accounted for the largest shares of both extra-EU imports (€798 million, +65%) and exports (€1.64 billion, +44.9%). The most dramatic intra-EU shift was Poland, whose extra-EU imports exploded from €40 million to €325 million (+708.4%), reflecting the country's rapid industrialization and integration into European manufacturing supply chains, particularly in the automotive sector. Italy (+155.2%) and France (+143.4%) also showed strong export growth, suggesting broad-based European competitiveness.

3. Growing import concentration, supply volatility, and rising trade openness signal increasing external dependency

Import concentration increased sharply while export markets diversified

The Herfindahl-Hirschman Index (HHI) for imports by value rose from 1,298 in 2015 to 2,122 in 2025 (+63.5%), moving from a moderately concentrated to a highly concentrated import structure. By volume, the HHI reached 3,965 — indicating extreme concentration. This was driven primarily by China's growing dominance. In contrast, the export HHI fell slightly (from 1,196 to 1,095, −8.4%), indicating that the EU sold to a more diversified set of partners over time. This asymmetry — increasingly concentrated imports against diversified exports — raises supply-chain vulnerability questions.

Trade intensity and export propensity nearly doubled, signalling deepening global integration

The trade intensity of CN 848390 products — the ratio of trade (exports plus imports) to EU production — nearly doubled, rising from 42.8% to 80.7%. Even more striking, export propensity (exports as a share of production) more than doubled from 32.4% to 71.8%. EU production value itself grew from €2.13 billion to €4.01 billion (+88.8%), but trade flows grew even faster, indicating that the EU's transmission component sector has become deeply intertwined with global markets.

Net import reliance worsened, though the EU remained a net exporter

The net import reliance indicator (imports minus exports as a share of apparent consumption) deteriorated from −16.8% to −34.5%, meaning the EU's net export position as a share of the domestic market actually strengthened in relative terms. However, the absolute import surge — particularly from concentrated Asian sources — means that disruptions to those supply lines would have material consequences.

Volatility was highest for emerging suppliers, and a notable price shock hit EU exports to India in 2023

The coefficient of variation of trade flows reveals that import volatility was highest for Brazil (CV = 0.69), the United Kingdom (0.57 — partly a Brexit effect), and Liechtenstein (0.38), while exports to the Russian Federation showed the highest volatility on the export side (CV = 0.68), likely reflecting sanctions and geopolitical disruption. A detected price shock centred on 2023 saw EU export prices to India jump by 56%, with an abnormality score of 8.5 — suggesting an outsized, potentially structural repricing event.

Conclusion

Over 2015–2025, the EU's market for gears, sprockets, and transmission components (CN 848390) underwent a fundamental transformation. The bloc remained a net exporter, but its trade surplus barely grew despite a 55% rise in export value — because imports surged by 91%, driven by massive volume growth from China (+178%) and India (+264%). The EU's export strategy appears to have pivoted toward higher-value products: export quantities were essentially flat while unit values climbed 50%, suggesting a shift toward premium, engineered transmission components.

Structurally, the market is becoming more globally integrated and more concentrated on the import side. EU trade intensity doubled to over 80%, export propensity more than doubled to nearly 72%, and import HHI rose to levels indicating high concentration — with China as the dominant supplier. At the same time, the EU's own production base grew robustly (nearly 90% in value), and export destinations diversified slightly.

The main risk going forward is the growing dependency on a narrow set of Asian suppliers for standard-grade components, even as the EU retains competitive advantages in high-specification exports. The dramatic growth of Poland and other Central European economies as both importers and re-exporters within the EU further underscores the deepening of intra-European supply chains in this sector. Monitoring concentration trends, particularly toward China and India, will be critical for assessing the EU's industrial resilience in this strategically important product category.