Belgian bike manufacturer Ridley today unveiled its E‑ASTR gravel e-bike, powered by TQ’s new HPR40 mid‑drive motor, which is being hailed as the world’s lightest and most efficient e‑bike motor. The system marries cutting-edge electric assistance with the race‑inspired ASTR gravel platform, retaining nearly the same look and feel as the non‑electric version.
The heart of the E‑ASTR is TQ’s HPR40 mid‑drive system, weighing just 1.17 kg and offering up to 200 W of assistance with 40 Newton‑meters of torque. A 290 Wh battery, concealed within the downtube, adds another 1.46 kg, enabling discreet integration that doesn’t compromise the bike’s silhouette or handling.
This minimalist setup ensures that riders experience a natural, unobtrusive pedal response. Support remains smooth up to a ceiling speed of 25 km/h (15.5 mph), after which it fades, allowing for authentic bike‑only propulsion. Visual differences are subtle—limited to a slightly wider downtube, a handlebar‑end LED indicator, and hidden internal cable routing.
Ridley is offering the E‑ASTR in three trim levels: a value SRAM Apex XPLR AXS build (€7,199/~US $8,500), a mid‑range SRAM Rival XPLR AXS 1×13 version (€8,199/~US $9,700), and a high‑end Shimano GRX 2×12 Di2 model (€8,899/~US $10,500). All models feature carbon‐fiber wheels, gravel‑specific brakes and tires, and integrated cockpits, positioning the E‑ASTR as a performance‑oriented gravel e‑bike.
Industry observers say the HPR40 represents a shift in e‑bike design philosophy—from raw power toward light, stealthy integration. By maintaining the analog feel of traditional bicycles while offering surplus support for climbs or endurance, the system appeals to purists and aging riders alike.
The launch of the E‑ASTR underscores a growing trend toward compact, performance‑focused electric bikes that enhance rather than replace the traditional riding experience. As battery and motor technology continue to miniaturize, more brands are likely to embrace this direction in the gravel and road e‑bike markets.
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