HKM-338003 Electric Road Bike

Precision‑engineered for the modern rider — where endurance road geometry meets seamless electric assistance.

Refined electric road performance

The HKM-338003 integrates a responsive 36V/250W mid‑drive motor into a lightweight 6061 aluminum frame, delivering natural pedal‑assist that amplifies your input without overwhelming it. Whether threading through urban traffic or stretching out on open tarmac, the bike stays composed, efficient, and genuinely fun to ride.

A 9‑speed drivetrain gives you the range to spin comfortably up steep grades and the tall gears to push beyond 31 mph (50 km/h) on flat sections. 700c wheels paired with hydraulic‑grade disc brakes provide confident stopping power and road‑smoothing stability — even when the weather turns. With more than 37 miles (60 km) of real‑world range and a battery that recharges in just over three hours, the HKM-338003 is built to keep your rides long and your downtime short.

Technical Specifications

*Range varies based on rider weight, terrain, assist level, and conditions.

Responsive mid‑drive dynamics

Unlike hub‑motor systems, the mid‑drive unit drives the crank directly, meaning the motor benefits from the same gear ratios you do. Climbing a 12% grade? Drop to a low gear and the motor spins in its most efficient RPM band, delivering consistent assist without overheating or sudden surges.

A precision torque sensor measures your pedaling force and cadence continuously, adjusting output up to 250W. The result is intuitive — you feel like you have bionic legs rather than riding a moped. Three assist modes (Eco, Sport, Boost) let you trade range for power with a simple handlebar control.

Even with assistance off, the bike pedals efficiently thanks to a freewheeling clutch that eliminates motor drag. This means you can ride it like a standard road bike when you want a pure workout.

Endurance battery with fast recovery

The 36V lithium‑ion pack uses high‑density 18650 cells arranged for balanced thermal performance. Its down‑tube integration doesn’t just look sleek — it centralizes mass, sharpening handling and making the bike feel more planted in corners.

With real‑world range exceeding 37 miles (60 km) in mixed assist mode, the HKM-338003 covers daily commutes and spirited weekend loops on a single charge. Switch to Eco mode and stretch that figure closer to 50 miles (80 km) under favorable conditions.

Charging is straightforward: remove the battery or plug directly into the frame port. A full charge takes roughly 3.2 hours, and the smart charger automatically switches to trickle mode once cells are balanced, preserving long‑term health.

All‑condition braking composure

Dual disc brakes — 160mm rotors front and rear — offer powerful, fade‑resistant stopping whether you’re descending a rain‑slicked hill or navigating sudden obstacles. The levers are ergonomically sculpted for two‑finger control, reducing hand fatigue on long rides.

Combined with the 700c wheels’ inherent gyroscopic stability, the braking system shortens stopping distances and boosts rider confidence. Maintenance is minimal: pad wear indicators and tool‑free adjustability keep you rolling without frequent shop visits.

Endurance geometry, all‑day fit

The 6061 aluminum frame uses hydroformed tubes to tune compliance — vertically forgiving to absorb road buzz, laterally stiff for efficient power transfer. A slightly taller head tube and relaxed seat angle reduce strain on your neck and shoulders, inviting hours in the saddle.

Internal cable routing keeps lines clean and protects shift and brake cables from the elements. The frame is finished with a multi‑stage wet‑coat paint that resists UV fading and minor abrasions, so the bike looks sharp mile after mile.

Available in three frame sizes (S/M/L), the HKM-338003 fits riders from roughly 5'3" to 6'4" (160–193 cm). A straightforward stem and seatpost design allows fine‑tuning without proprietary tools.

Intuitive cockpit & display

A backlit LCD display sits flush on the handlebar, providing real‑time speed, battery state‑of‑charge, assist level, trip distance, and odometer. The screen is readable in direct sunlight and automatically dims in low light, so you’re never distracted.

The minimalist handlebar remote lets you toggle assist modes and walk‑mode without removing your hands from the grips. Walk‑mode gently powers the bike at 3.7 mph (6 km/h), making it easy to maneuver through pedestrian zones or up parking ramps.

Frequently Asked Questions

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