Powerfly 4 is our most affordable electric mountain bike. It’s built with parts that hold up, like a smooth-shifting Shimano drive train, 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 that you never thought you’d reach on a mountain bike.
 Model 32844
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You’re sold on the e-bike revolution and want the capability and versatility of a mountain bike at a price that doesn’t resemble the car you’re trying to use less. You want bigger, better off-road adventures, and know that an e-MTB with the latest user-friendly tech is the best way to get them.
A tough yet refined aluminium frame that fully encases a long-range 500 Wh battery for sleek looks, a Bosch Performance CX (250 W, 85 Nm) motor that assists up to 20 mph or 32 km/h, a Bosch Purion controller, a 1×10 Shimano drive train, an SR Suntour fork with lockout and hydraulic disc brakes. Plus, Smart Wheel Sizing means riders of every size get a great fit – 29˝ wheels on larger frames, 27.5˝ wheels on smaller frames.
Our most affordable electric mountain bike comes with the same powerful Bosch motor and intuitive controller as our most expensive e-bikes, with a smaller battery and parts chosen to give you great value.
Smaller frames (S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. The larger frames (M and ML) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
The Bosch Performance Line CX sets the standard for eMTB performance with up to 85 Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain.
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.
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.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148|
|Fork||SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 120 mm travel|
|Max compatible fork travel||120mm (XS & S: 100mm)|
|Hub front||Formula DC-511, 6-bolt, Boost110, 15 mm thru axle|
|Hub rear||Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle|
|Skewer rear||Bontrager Switch thru-axle, removable lever|
|Rim||Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve|
|Spokes||14 g stainless steel|
Bontrager XR3 Comp, wire bead, 30 tpi, 27.5×2.35″
|Size: M , L , XL|
Bontrager XR3 Comp, wire bead, 30 tpi, 29×2.30″
|Max tyre size||Frame: 29×2.60″ or 27.5×2.8″ (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, 165 mm length|
|Cassette||Shimano Deore M4100, 11-46, 10-speed|
|Chain||KMC X10, 10-speed|
|Pedal||VP-536 nylon platform|
|Max. chainring size||38T|
|Saddle||Bontrager Commuter Comp|
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
|Size: L , XL|
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
|Size: M , L , XL|
Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
|Grips||Bontrager XR Endurance Comp|
|*Stem||Size: S , M|
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length
|Size: L , XL|
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length
|Head set||FSA IS-2, 1-1/8″ top, 1.5″ bottom|
|Brake rotor||Tektro, 6-bolt, 203 mm|
|Battery||Bosch PowerTube 500 Wh|
|Charger||Bosch compact 2A, 100–240V, smart system|
|Motor||Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand|
|Weight||M – 23.37 kg / 51.53 lbs|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).|
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on archcycles.com are for general comparison purposes only. To find your perfect fit, visit an authorised retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
All measurements provided in cm unless otherwise stated.
2022 Powerfly 4