Last week, we reported that the e-bike world had a new motor claiming to be the lightest and most efficient. Now, we’re already seeing TQ’s new TQHPR40 motor proliferate on more road and gravel e-bikes, including the recently announced E-ASTR from Ridely.
Ridley’s new E‑ASTR brings lightweight electric assistance to its already impressive ASTR gravel platform, powered by the cutting-edge TQ HPR40 mid-drive system. Unlike bulkier e‑bike setups, this system adds just 1.17 kg (2.6 lb) at the crank and a discreet 1.46 kg (3.2 lb) and 290 Wh battery hidden within the downtube, keeping the frame’s silhouette nearly identical to the non-electric version of the same bike. According to BikeRumor, riders looking closely might spot only a slightly fatter downtube, internal cable routing, and a handlebar-end LED indicator, giving visual clues without shouting “electric bike.”
What the E‑ASTR gives up in sheer power from the petite motor, it gains in ride feel. The HPR40 is said to deliver a modest 40 Nm of torque and up to 200W of assist, or enough to smooth out climbs or offer a tailwind on gravel without overpowering the rider. With support cut off at 25 km/h (15.5 mph), pedal responsiveness remains natural and fluid. Combined with the ASTR’s race-inspired geometry, the bike looks to offer sharp handling and comfort suited to the rigors of modern gravel routes.
Ridley is currently offering the E‑ASTR in three spec levels: a value SRAM Apex XPLR AXS build €7,199 (or approximately US $8,500), a mid-range SRAM Rival XPLR AXS 1×13 version for €8,199 (or approximately US $9,700), and a top-tier Shimano GRX 2×12 Di2 model for €8,899 (or approximately US $10,500). Each features high-end drivetrains, integrated cockpit options, carbon wheels, and industry-standard gravel brakes and tires. With its race-ready frame and stealthy, lightweight e‑assistance, the E‑ASTR is positioning itself as a high-performance gravel machine that stays true to its roots, delivering help when needed, without overshadowing the rider.
Ultra-lightweight motors like the TQHPR40 are quietly reshaping the e-bike industry by making electric assistance almost invisible, both in looks and in feel. As systems shrink and integrate more seamlessly into traditional bike frames, they’re opening the door to new categories of performance-oriented e-bikes that preserve the ride dynamics of analog bikes while offering just enough support when it counts.
For riders who value a natural pedaling experience but still want a little help on climbs or longer days, and especially for aging riders who want to maintain their riding habits despite father time taking an impact on joints and muscles, these minimalist systems are proving that you don’t need a bulky battery or a massive motor to get the benefits of going electric. The result is a wave of stealthy, high-performance e-bikes that are less about replacing effort and more about enhancing the ride.
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