2018 Trek Powerfly 4



Experience more

Powerfly e-MTB expands boundaries. We’ve paired our proven mountain bike design with the reliable propulsion of Bosch pedal-assist e-bike technology in a bike that lets you experience more.

End of the trail? Not for you! Especially if you’re searching for an e-bike with the extra power to let you go even further. Powerfly takes you everywhere and a little bit beyond.

  • Powerful central-mount Bosch motor, for speeds up to 20 mph (25 km/h in Europe)
  • Alpha Platinum Aluminium frame with additional Motor Armor protection
  • Ready for extras: accessorise with lights, mudguards, racks and more
  • 29˝ wheels roll faster, ride better and clear more obstacles


Frame Alpha Gold Aluminium, E2 tapered head tube, internal derailleur routing, Balanced Geometry

Front suspension RockShox XC 30, coil spring, preload, TurnKey lockout, G2 Geometry w/51 mm offset, 100 mm travel


Front Hub Formula DC20 alloy

Rear Hub Formula DC22 alloy

Rims Bontrager Connection 32-hole double-walled

Tyres Bontrager XR3, 29×2.30˝


Shifters Shimano Altus M2000, 9-speed

Rear derailleur Shimano Acera M3000, Shadow

Crank RIDE+ aluminium 15T w/chainguard

Cassette Shimano HG200, 11-36, 9-speed

Chain KMC X9

Pedals Wellgo nylon platform


Saddle Bontrager Evoke 1.5

Seatpost Bontrager SSR, 2-bolt head, 31.6 mm, 12 mm offset

Handlebar Bontrager alloy, 31.8 mm, 15 mm rise

Grips Bontrager Race Lite, lock-on

Stem Bontrager alloy, 31.8 mm, 7-degree, Blendr compatible

Head set FSA IS-2, 1-1/8˝ top, 1.5˝ bottom

Brake set Tektro M285 hydraulic disc


Battery Bosch Powerpack Performance 500 downtube

Controller Bosch Purion Performance

Motor Bosch Performance CX, 250 watt, 75 Nm


Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).


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