Eunorau FAT-HS Electric Bike: Dual-Suspension Power for Backcountry Adventures

The Eunorau FAT-HS is built for serious riders who crave remote trails, big gear, and the confidence to push farther. With a robust dual-suspension chassis, dual batteries, and a high-torque mid-drive system, this fat-tire monster delivers traction, control, and propulsion when the terrain gets gnarly—whether you’re charging fire roads, deep mud, snow, or sand, or simply cruising to the trailhead on city streets.

Powerful mid-drive propulsion that adapt to every climb

The FAT-HS uses a Bafang mid-drive setup designed to leverage the bike’s gears for optimum torque and speed. Key performance points include:

• Nominal 1000W motor with 160 Nm of peak torque, enabling confident climbs and steady acceleration on steep grades.
• Maximum speed up to 28 mph (48 km/h) to shorten long commutes or fast-paced trail sections when you want it.
• Cadence-sensing assist that feels natural as you shift through gears, helping conserve battery while maintaining power on variable terrain.
• On some configurations, M615-based performance delivers up to 1500W peak power and 160 Nm torque, providing extra grunt when you need it most—without sacrificing control on mixed surfaces.

Dual-suspension, dual-battery versatility for all-terrain endurance

Conquer rugged routes with a balance that keeps you smooth and confident. Notable features include:

• Front suspension with a 75mm travel RST fork that absorbs rocks, roots, and chatter, letting you ride faster with less fatigue.
• Rear suspension (KS-388RL, 48mm) to maintain wheel contact and stability through technical sections and fast descents.
• Dual-battery setup: a standard 48V 15Ah battery plus an optional second battery (14/17Ah), enabling longer missions and reduced downtime between rides.
• Real-world range up to 80 miles when pairing a 48V 17Ah battery with the second pack, ideal for multi-day adventures or remote exploration.

Built for reliability, performance, and everyday versatility

From technical expeditions to weekend commutes, the FAT-HS pairs rugged components with thoughtful design choices:

• Wheelset and tires: 26" x 4.0" Kenda Krusade Sport fat tires with K-Shield protection for extra puncture resistance on rough trail surfaces.
• Braking confidence: 180mm hydraulic disc brakes deliver predictable stopping power in mud, rain, or snow.
• Shifter and drivetrain: SHIMANO ALTUS/SUNRACE 9-speed system offers broad gearing options for climbing and cruising, while a 42T CNC chainring keeps crank effort manageable on long rides.
• Frame and build: Aluminum 6061 full-suspension frame combines stiffness with damping where it counts, delivering a balanced ride feel and generous payload capacity (up to 300 lbs).
• Driver assist and lighting: CDC6 LCD display for ride data, a dedicated front light and rear taillight for visibility in dawn, dusk, or mixed-light conditions.

Who this bike is for

The FAT-HS is ideal for riders who want to blend backcountry exploration with practical day-to-day use: - Adventurers who frequent long, remote trails and need extended range without frequent recharging.

- Riders who tackle muddy, sandy, snowy, or rocky terrain and need confident traction and suspension to stay comfortable all day.

- Commuters who want a capable ride on fire roads or mixed surfaces, with enough payload to bring gear, tents, or groceries.

- Those who appreciate a high-torque mid-drive that makes efficient use of gearing for climbing and towing light trailers.

Why the FAT-HS stands out

Unlike bikes powered by hub motors, the FAT-HS’s mid-drive setup uses the pedal gears to maximize torque and efficiency on variable terrain. Pair that with dual suspension and dual batteries, and you gain a system that’s not just about speed—it’s about dependable range, traction, and ride quality across diverse conditions. The bike’s 300 lb payload capacity, large-fat tires, and rugged components make it a standout option for serious off-road enthusiasts who still value everyday practicality.

Practical tips and best practices

• To install a second battery, lock out the rear shock to protect the suspension and components during handling.
• Expect real-world range to vary with terrain, rider weight, wind, tire pressure, and assist level; plan trips with conservative estimates if you’re venturing far from power.
• Regularly check tire treads and air pressure (fat tires perform best around 12–18 psi depending on load and terrain) to maximize grip and efficiency.
• Charge with the included 2.0 A smart charger for optimal battery health and longevity.
• Store and transport the FAT-HS with care—its heavy frame benefits from proper mounting and stable stands when parked or serviced.

Specifications at a glance

Motor: 48V mid-drive (nominal 1000W, up to ~1500W peak on M615 platform) with 160 Nm torque

Battery: 48V 15Ah standard; optional second battery (14/17Ah); range up to 80 miles with larger pack

Top speed: 28 mph (≈ 48 km/h)

Range: Up to ~80 miles with dual batteries under favorable conditions

Suspension: Front 75mm travel RST fork; Rear KS-388RL shock

Tires: 26" x 4.0" fat tires with K-Shield protection

Brakes: 180mm hydraulic disc brakes

Payload: 300 lbs maximum

Display/Control: CDC6 LCD with pedal assist levels 0–5, thumb throttle