Powerful, Versatile & Trail-Ready Electric MTB Performance
The 2021 Trek Powerfly 4 is the ideal entry into premium electric mountain biking, combining trail-ready durability with the smooth assistance of Bosch’s proven drive system. Designed for riders who want confidence on climbs, stability on descents, and all-day adventure capability, the 2021 Trek Powerfly 4 delivers reliable performance at an unbeatable value.
Whether you’re exploring forest trails, cruising fire roads, or boosting your weekend rides with effortless climbing, the 2021 Trek Powerfly 4 has the power and control to take your riding further.
Bosch Performance Line CX — Power You Can Trust
The 2021 Trek Powerfly 4 is equipped with:
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Bosch Performance Line CX motor
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250W power output
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Up to 85 Nm of torque
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Smooth, natural pedal assist
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Excellent hill-climbing capability
This system gives you strong acceleration while staying efficient and quiet.
Long-Range Battery for Adventure
With the PowerTube integrated battery, the 2021 Trek Powerfly 4 offers:
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Long-distance riding capability
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Sleek internal frame integration
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Secure, vibration-free mounting
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Convenient charging on or off the bike
Perfect for full-day rides or commuting with ease.
Trail-Ready Geometry & Durable Components
The 2021 Trek Powerfly 4 features:
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Lightweight yet tough aluminum frame
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120mm suspension fork for comfort on rough terrain
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Reliable Shimano drivetrain
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Stable 29” or agile 27.5” wheels (size-dependent)
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Hydraulic disc brakes for confident stopping
The bike is built to handle real mountain biking — not just gravel paths.
| Category | Specification |
|---|---|
| Model | 2021 Trek Powerfly 4 |
| Frame | Alpha Platinum Aluminum |
| Drive Unit | Bosch Performance Line CX |
| Battery | Bosch PowerTube |
| Motor Torque | Up to 85 Nm |
| Wheel Size | 27.5″ (XS–S) / 29″ (M–XL) |
| Fork | 120mm suspension fork |
| Drivetrain | Shimano 1x system |
| Brakes | Hydraulic disc |
| Use Case | Trail, Adventure, Off-road E-MTB |
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