The Trek Powerfly 5 is a versatile and powerful electric mountain bike that’s been refined over the years. Now in its fourth generation, it wears the Gen 4 name tag.

Built around a powerful Bosch Performance Line CX motor and large capacity 625Wh battery (a genuine Bosch model), the Powerfly 5 is perfectly equipped to tackle the steep hills of Devon and the surrounding areas. It also features Trek's user-friendly 'Removable Integrated Battery’ (RIB) system that fully encases the battery in the frame, yet doesn't require tools for removal – just a key.

Using Trek’s proven Smart Wheel Sizing system, the frame size is matched to a suitable wheel size. This keeps the proportions correct, aiding both the fit and handling. Five frame sizes ensure a no-compromise fit for most rider heights.

Our Verdict: The Powerfly is ideal for multi-surface exploring – from gravel forest fire roads to more challenging trail centre tracks. The fast-rolling, high volume tyres give a comfortable ride and boost confidence whether off road or on.

Read more in our Buyer’s Guide to Electric Bikes

KEY FEATURES AND BENEFITS OF THE POWERFLY 5 GEN 4

• Alpha Platinum Aluminium frame, with a lifetime warranty. Five frame sizes ensures a dialled fit for efficiency and comfort.

• RockShox Recon Silver RL fork is air-sprung and has a handy lockout feature for riding on smoother surfaces.

• 120mm suspension fork travel, with 80mm on size XS bikes.

• The Bosch Performance Line CX motor has ample power to deal with steep hills, heavier riders or a bike loaded with luggage.

• The Bosch Intuvia 100 controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain.

• The Shimano Deore/XT 1x12 drivetrain gives you a wide gear range. The gear shifting is intuitive to use and the components robust and reliable.

• 4-piston hydraulic disc brakes are powerful, reliable and work well in wet and dry conditions. With no brake cables they are sealed from the weather.

• You can boost your Powerfly's utility by adding a rack and mudguards, plus built-in wiring lets you easily install lights powered by the motor.