Trek Powerfly 4 Bike
Powerfly 4 is our most affordable electric mountain bike. It’s built with parts that hold up, like a smooth-shifting Shimano drivetrain, and a powerful Bosch motor. Plus, it features our user-friendly Removable Integrated Battery (RIB) system that’s fully encased in the frame yet doesn’t require tools for removal. This bike expands your boundaries and lets you travel to destinations you never thought you’d reach on a mountain bike
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
| Frame | Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle |
|---|---|
| *Fork | Size: XS SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 80mm travel |
| Size: S , M , L , XL SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 120mm travel |
Wheels
| Hub front | Formula DC-511, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Hub rear | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Rim | Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve |
| Spokes | 14g, stainless steel, black |
| *Tire | Size: XS , S Bontrager XR3 Comp, wire bead, 30tpi, 27.5×2.35” |
| Size: M , L , XL Bontrager XR3 Comp, wire bead, 30tpi, 29×2.30” |
Drivetrain
| Shifter | Shimano Deore M4100, 10 speed |
|---|---|
| Rear derailleur | Shimano Deore M5120, long cage |
| Crank | FSA Bosch CK-220, 36T ring, 165mm length |
| Cassette | Shimano Deore M4100, 11-46, 10 speed |
| Chain | KMC X10, 10 speed |
| Pedal | VP-536 nylon platform |
Components
| Saddle | Bontrager Commuter Comp |
|---|---|
| *Seatpost | Size: XS , S Bontrager alloy, 31.6mm, 12mm offset, 330mm length |
| Size: M Bontrager alloy, 31.6mm, 12mm offset, 360mm length |
|
| Size: L , XL Bontrager alloy, 31.6mm, 12mm offset, 400mm length |
|
| *Handlebar | Size: XS , S Bontrager alloy, 31.8mm, 15mm rise, 720mm width |
| Size: M , L , XL Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
|
| Grips | Bontrager XR Endurance Comp, lock-on |
| *Stem | Size: XS Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length |
| Size: S , M Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length |
|
| Size: L , XL Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length |
|
| Headset | FSA IS-2, 1-1/8” top, 1.5” bottom |
| Brake | Tektro HD-M275 hydraulic disc |
| Brake rotor | Tektro, 6-bolt, 203mm |
Accessories
| Battery | Bosch PowerTube 500 |
|---|---|
| Charger | Bosch compact 2A (100-240V) charger |
| Controller | Bosch Purion |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist |
Weight
| Weight | M – 23.67 kg / 52.18 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local retailer.
Rider Height
Inseam
XS
137.0 – 155.0 cm
4’5.9″ – 5’1.0″
64.0 – 73.0 cm
25.2″ – 28.7″
S
153.0 – 166.5 cm
5’0.2″ – 5’5.6″
72.0 – 79.0 cm
28.3″ – 31.1″
M
161.0 – 175.0 cm
5’3.4″ – 5’8.9″
76.0 – 82.0 cm
29.9″ – 32.3″
L
174.0 – 188.0 cm
5’8.5″ – 6’2.0″
82.0 – 88.0 cm
32.3″ – 34.6″
XL
186.0 – 196.0 cm
6’1.2″ – 6’5.2″
87.0 – 92.0 cm
34.3″ – 36.2″
All measurements provided in cm unless otherwise noted.
| Frame size number | Frame size letter | Wheel size | A — Seat tube | Effective seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | F — Bottom bracket height | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.5 | XS | 27.5″ | 36.3 | 73.5° | 13.0 | 68.5° | 57.0 | 29.1 | 6.5 | 45.5 | 4.4 | 9.5 | 109.9 | 70.7 | 39.0 | 60.7 |
| 15.5 | S | 27.5″ | 39.4 | 71.6° | 13.0 | 67.6° | 59.8 | 30.7 | 4.9 | 45.5 | 4.4 | 10.1 | 112.5 | 72.9 | 39.0 | 62.3 |
| 17.5 | M | 29″ | 41.9 | 71.5° | 13.0 | 67.7° | 61.8 | 32.5 | 4.8 | 45.5 | 4.4 | 10.7 | 115.9 | 79.6 | 40.4 | 64.0 |
| 19.5 | L | 29″ | 47.0 | 71.7° | 14.0 | 67.7° | 64.1 | 32.4 | 5.0 | 45.5 | 5.1 | 9.8 | 118.0 | 75.8 | 42.7 | 64.9 |
| 21.5 | XL | 29″ | 52.1 | 71.7° | 16.0 | 67.7° | 67.2 | 32.4 | 5.0 | 45.5 | 5.1 | 9.8 | 121.2 | 76.8 | 45.2 | 66.7 |
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