2025 Trek Powerfly FS+ 4 Gen 4 – Electric Mountain Bike
Specifications
| 
   Specification  | 
  
   Details  | 
 
| 
   Model  | 
  
   Powerfly FS+ 4 Gen 4  | 
 
| 
   Vehicle Category  | 
  
   Electric Mountain Bike  | 
 
| 
   Application  | 
  
   Trail riding, alpine adventures, all-mountain  | 
 
| 
   Starting Price (2025)  | 
  
   $5,499.99 USD  | 
 
| 
   Color Options  | 
  
   Pennyflake/Black Olive, Grey-Black, Orange-Greendark  | 
 
| 
   Sizes  | 
  
   S (27.5" wheel), M (29" wheel), L (29" wheel), XL (29" wheel)  | 
 
Frame & Drivetrain
| 
   Specification  | 
  
   Details  | 
 
| 
   Frame  | 
  
   Alpha Platinum Aluminum, internal storage, 120mm travel, 148x12mm thru axle  | 
 
| 
   Fork  | 
  
   RockShox Recon Silver, Solo Air, 130mm travel, 42mm offset (S), 46mm offset (M, L, XL), 15x110mm thru axle  | 
 
| 
   Rear Shock  | 
  
   RockShox Deluxe Select R, 205x50mm, 120mm travel  | 
 
| 
   Drivetrain Compatibility  | 
  
   Shimano CUES, 1x10-speed, mechanical  | 
 
| 
   Dropouts  | 
  
   15x110mm thru axle (F), 148x12mm thru axle (R)  | 
 
| 
   Crank  | 
  
   Shimano CUES U6000, 32T, 170mm (S), 175mm (M, L, XL)  | 
 
| 
   Chain  | 
  
   Shimano CUES LG500, 10/11-speed  | 
 
| 
   Rear Derailleur  | 
  
   Shimano CUES U6000, 10-speed, mechanical  | 
 
| 
   Shifters  | 
  
   Shimano CUES U6000, 10-speed, mechanical  | 
 
| 
   Cassette  | 
  
   Shimano CUES LG400, 11-46T, 10-speed  | 
 
Components & Features
| 
   Specification  | 
  
   Details  | 
 
| 
   Seating  | 
  
   Bontrager Arvada, 138mm width  | 
 
| 
   Fuel Type  | 
  
   Electric (Bosch Performance Line CX motor)  | 
 
| 
   Cargo Capacity  | 
  
   Internal storage (Bontrager BITS bag included), downtube water bottle mounts, rack and fender mounts  | 
 
| 
   Wheels/Tyres  | 
  
   Bontrager Line TLR 30, tubeless ready, 29x2.60" (S: 27.5x2.60"), Bontrager XR5 Team Issue  | 
 
| 
   Wheel Size  | 
  
   29" (S: 27.5") in  | 
 
| 
   Brakes  | 
  
   Tektro Gemini SL, 4-piston hydraulic disc, 203mm rotor (F), 180mm rotor (R)  | 
 
| 
   Brake Levers  | 
  
   Tektro Gemini SL, hydraulic  | 
 
| 
   Handlebar  | 
  
   Bontrager alloy, 31.8mm, 15mm rise, 750mm width  | 
 
| 
   Stem  | 
  
   Bontrager alloy, 31.8mm, 7 degree, 50mm length  | 
 
| 
   Headset  | 
  
   Semi-integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom  | 
 
| 
   Saddle  | 
  
   Bontrager Arvada, 138mm width  | 
 
| 
   Seatpost  | 
  
   TranzX JD-YSP39, 100mm travel (S), 150mm travel (M), 170mm travel (L, XL), 34.9mm  | 
 
| 
   Seatpost Clamp  | 
  
   Integrated, internal  | 
 
| 
   Grips  | 
  
   Bontrager XR Trail Comp, nylon lock-on  | 
 
| 
   Front Hub  | 
  
   Bontrager alloy, sealed bearing, 6-bolt, 15x110mm thru axle  | 
 
| 
   Rear Hub  | 
  
   Bontrager alloy, sealed bearing, 6-bolt, Shimano 10/11-speed freehub, 148x12mm thru axle  | 
 
| 
   Rims  | 
  
   Bontrager Line TLR 30, tubeless ready, 29mm width (S: 27.5mm width)  | 
 
| 
   Spokes  | 
  
   14g stainless steel  | 
 
| 
   Exterior Features  | 
  
   Internal storage (Bontrager BITS bag included), downtube water bottle mounts, rack and fender mounts  | 
 
| 
   Motor  | 
  
   Bosch Performance Line CX, 85Nm, 250W continuous power, 28mph/45kph max assist (Class 3)  | 
 
| 
   Battery  | 
  
   Bosch PowerTube 625Wh, integrated, removable  | 
 
| 
   Controller  | 
  
   Bosch LED remote, 4 assist modes (Eco, Tour, eMTB, Turbo), walk assist  | 
 
| 
   Charger  | 
  
   Bosch 4A charger  | 
 
