Universal hardtail fit · AAR 2.0 smart assist · gyro slip detection · handlebar remote · power bank function · 14–29" wheels · 25–35 mm round seat post

Turn almost any regular hardtail bicycle into an e-assisted ride in minutes. This clamp-on friction booster mounts to your round seat post, presses a drive wheel against the rear tire and delivers smooth, personalized electric assist. A handlebar remote keeps control at your fingertips, the built-in battery doubles as a portable power bank, and a gyro safety system cuts power if the bike tilts too far — no frame modifications, no permanent changes to your bike.

📏 Strong Compatibility for Diverse Bikes

Fits a wide range of hardtail bicycles without permanent alteration:

• Bike types: Mountain, road, hybrid and folding hardtail bikes
• Wheel size: 14–29 inches (35.6–73.7 cm)
• Seat post: Cylindrical / round tube only, 25–35 mm diameter
• Tire width: 25–65 mm for V-shaped / city tires, 23–32 mm for road tires, 45–65 mm for mountain tires

Important note: Not compatible with carbon fiber seat posts, D-shaped seat tubes, tricycles, wheelchairs or full-suspension / rear-suspension bikes.

🧠 Smart Assistance with AAR 2.0

Patented AAR 2.0 technology delivers seamless, personalized e-bike assistance that adapts to your pedaling rhythm and riding style for a natural, responsive feel.

🛡️ Gyro Slip & Tilt Safety

A built-in gyroscope monitors bike angle in real time. If it detects a tilt over 30°, the motor automatically shuts off to prevent loss of traction and improve fall safety.

🎮 Handlebar Remote Control

Keep both hands on the handlebar for safety:

• Acceleration / Deceleration: Adjust assist level directly from the remote.
• Function key: Single-click toggles standby / cycles modes; double-click cycles assist / cruising modes.
• Turn signal & light control: Integrated with your bike's light system.
• Smart helmet compatible: Works with supported smart helmets.

🔋 Battery Doubles as a Portable Power Station

The built-in battery also serves as a portable power bank to charge your phone, cycling computer or other USB devices on the go.

📋 Full Compatibility Guide

Not suitable for tricycles, wheelchairs, D-shaped seat tubes, carbon fiber seat posts, or rear-suspension bikes.

📦 Package Includes

1 × Friction-drive bike booster unit 1 × Handlebar remote control 1 × Mounting clamp & hardware 1 × Charging cable 1 × User manual

💡 Usage & Safety Tips

• Measure your seat post diameter and confirm it is round (not D-shaped or carbon fiber) before ordering.
• Tighten the clamp securely and align the drive wheel squarely with the center of the rear tire.
• The tilt safety feature is an assistance system, not a substitute for careful riding; always wear a helmet and obey local traffic laws.
• Charge with the supplied cable; use the power bank function only with standard 5V USB devices.
• Avoid heavy rain and deep water; wipe the unit dry after wet rides to extend its lifespan.