Class 1

Purely pedal-assist, up to 20 mph

Class 2

Pedal-assist with throttle-assist up to 20 mph

Class 3

Purely pedal-assist up to 28 mph

Mid-drive

• —Between the pedals/cranks; powers the front sprocket and chain — more efficient
• —Torque-based — motor engages as you press the pedals
• —Smooth power delivery through the chain
• —Great for all kinds of riding
• —Smaller, lighter; typically runs 36V
• —Balanced, low center of gravity
• —Most are 250W (20 mph); some are 350W (28 mph)

Hub-drive

• —In the rear wheel/hub; powers the rear wheel directly — less efficient
• —Cadence-based — motor engages after a full pedal rotation
• —Most include a throttle — no pedalling required
• —Best for road riding or light, non-bumpy trails
• —Bigger, heavier; typically runs 48V
• —Folding options available
• —Motors from 350W up to 500W, 750W, and 1000W

Mount styles

• Downtube mount
• Seat post mount
• Rack mount
• Integrated mount

Common capacities

250Wh · 375Wh · 400Wh · 500Wh · 625Wh · 650Wh · 750Wh · 800Wh · 900Wh