Trek Powerfly Fs 4 Gen 2 Mountain Bike
Bosch Performance Line CX motor
Bosch Performance Line CX sets the standard for eMTB performance with up to 85Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain.
Custom eMTB Lite mode
Trek eMTBs feature a custom eMTB Lite mode in place of Tour mode. It gives you more natural-feeling power delivery and longer battery life.
Removable Integrated Battery
RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security, or just easier charging.
What is the range?
To see how far you can ride your electric mountain bike on a single charge, check out Bosch’s range calculator. We’ve auto-filled the variables for this bike model and the average rider, but you can make adjustments to get your most accurate estimate.
| Frame | Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armor, magnesium rocker link, rack and fender mount, ABP, Boost148, 100mm travel |
|---|---|
| *Fork | Size: XS , S SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 41mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru axle, 100mm travel |
| Size: M , L , XL SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru axle, 120mm travel |
|
| Shock | SR Suntour Edge R, 190mm x 45mm |
| Max compatible fork travel | 120mm (XS & S: 520mm axle-to-crown, M & up: 545mm axle-to-crown) |
| Hub front | Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Hub rear | Bontrager Approved DC-3248, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Rim | Alex MD35, tubeless compatible, 32-hole, 35mm width, Presta valve |
| Spokes | 14g stainless steel, black |
| *Tire | Size: XS , S Bontrager XR3 Comp, wire bead, 30tpi, 27.5×2.35” |
| Size: M , XL Bontrager XR3 Comp, wire bead, 30tpi, 29×2.30” |
|
| Rim strip | Bontrager TLR |
| Max tire size | Frame: 29×2.40″ (XS & S: 27.5×2.60″), Fork: See manufacturer |
| Shifter | Shimano Deore M4100, 10 speed |
|---|---|
| Rear derailleur | Shimano Deore M5120, long cage |
| Crank | FSA Bosch CK-220, 36T ring, 165mm length |
| Chainring | FSA, 36T, steel |
| Cassette | Shimano Deore M4100, 11-46, 10 speed |
| Chain | KMC X10, 10 speed |
| Pedal | VP-536 nylon platform |
| Max chainring size | 1x: 46T, min 34T |
| Saddle | Bontrager Arvada, steel rails, 138mm width |
|---|---|
| *Seatpost | Size: XS , S , M TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length |
| Size: L , XL TranzX JD-YSP18, 130mm travel, internal routing, 31.6mm, 425mm length |
|
| Handlebar | Bontrager alloy, 31.8mm, 15mm rise, 720mm width |
| Grips | Bontrager XR Trail Comp, nylon lock-on |
| *Stem | Size: XS , S Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length |
| Size: M , L , XL Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length |
|
| Headset | FSA IS-2 |
| Brake rotor | Tektro, 6-bolt, 203mm |
| Brake Set | Tektro HD-M275 hydraulic disc |
| Battery | Bosch PowerTube 500Wh |
|---|---|
| Charger | Bosch compact 2A, 100-240V, smart system |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist |
| Computer | Bosch Purion |
| Fender | Trek Powerfly 29” custom fender |
| Weight | M – 24.83 kg / 54.75 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
| Size | Rider Height | Inseam |
|---|---|---|
| XS |
145 – 155 cm 4’9″ – 5’1″ |
69 – 73 cm 27″ – 29″ |
| S |
155 – 165 cm 5’1″ – 5’5″ |
74 – 78 cm 29″ – 31″ |
| M |
165 – 176 cm 5’5″ – 5’9″ |
79 – 83 cm 31″ – 33″ |
| L |
177 – 188 cm 5’10” – 6’2″ |
84 – 89 cm 33″ – 35″ |
| XL |
188 – 195 cm 6’2″ – 6’5″ |
89 – 91 cm 35″ – 36″ |
Giles –
Great fast service and good prices.
Peter –
Good products, well packaged and delivered promptly.