eBikes by their very nature can in the future require aftermarket updates and support. This cannot be supplied by All Terrain Cycles at distance; if required the work would have to be obtained from your local Brand Dealership, possibly at extra cost to yourself.

Your eBike will be delivered built, set up and updated.

Minimum personal assembly is required.

The Powerfly 4 625 takes our most affordable electric mountain bike, and gives it a boost with a longer-range 625 watt-hour battery. Of course, you still get our user-friendly Removable Integrated Battery (RIB) system that's super easy to remove and reinstall, plus all the other parts that make Powerfly 4 your ideal entry into the joys of riding a pedal-assist bike on or off road.

It's right for you if...

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.

The tech you get

A tough yet refined aluminium frame that fully encases a long-range 625 Wh battery for sleek looks, a Bosch Performance CX (250 W, 75 Nm) motor that assists up to 25 km/h, a Bosch Purion controller, a 1x10 Shimano drive train, an 80 mm 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.

The final word

This model gives you longer range battery than the standard Powerfly 4, so you’ll never be short on fun.

Why you'll love it

• Trek's Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage
• This bike expands boundaries: the top-notch Bosch system is equally suited to commuting, recreation and a ridiculously fun time on the trails
• The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
• It's equipped with an external charging port for easy charging on or off the bike
• You can boost your Powerfly’s utility by adding a rack and mudguards, plus built-in wiring lets you easily install lights powered by the motor

• Bosch Performance CX motor:Perfect for tackling the climbs
• 625Wh Battery:Gives you a peace of mind with its higher range
• Hydraulic Disc Brakes:Reliable braking performance in all conditions

• Frame: Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle
• Fork: SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 80mm travel
• Motor: Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 15.5mph or 25km/h max assist
• Battery: Bosch PowerTube 625
• Controller: Bosch Purion
• Gear Shifters: Shimano Deore M4100, 10 speed
• Chainset: FSA Bosch CK-220, 36T ring, 165mm length
• Chainrings:36T
• Rear Cassette: Shimano Deore M4100, 11-46, 10 speed
• Chain: KMC X10, 10 speed
• Front Derailleur: N/A
• Rear Derailleur: Shimano Deore M5120, long cage
• Pedals: VP-536 nylon platform
• Rims: Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve
• Front Hub: Formula DC-511, 6-bolt, Boost110, 15mm thru axle
• Rear Hub: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle
• Front Tyre: Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30"
• Rear Tyre: Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30"
• Brakes: Tektro HD-M275 hydraulic disc, 203mm rotors
• Handlebars: Bontrager alloy, 31.8mm, 15mm rise, 750mm width
• Headset: FSA IS-2, 1-1/8" top, 1.5" bottom
• Stem: Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length
• Saddle: Bontrager Commuter Comp, 165mm width
• Seatpost: Bontrager alloy, 31.6mm, 12mm offset, 400mm length
• Weight: M - 23.37 kg/51.53 lb

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.

After the first few weeks of use, the whole bike will settle down. As a result, the gears may need tweaking, some nuts and bolts may need tightening and you may well need to check the adjustment of the saddle and handlebars.

CABLE STRETCH

Gears

Cable stretch tends to occur shortly after a new bike has been ridden a few times. A rear derailleur that we have tuned to hit every gear, nicely and quietly, may now not be making each shift causing a sensation and sound of “being in between gears”. Generally you may have to shift up, or shift down a couple times to quiet it down and settle the derailleur into a “happy gear”. A front derailleur may no longer want to shift all the way onto the big ring or will require a much firmer push to get it there. It is advisable to get the cable tension adjusted as soon as this happens either by your local bike shop. This tune up is considered a necessary part of any bicycles maintenance schedule and as such should not be ignored.

Brakes

Your brakes will also be affected by cable stretch (provided of course that they are NOT hydraulic in which case this does not apply). The symptom here is that they usually start to feel quite loose. i.e. you have to pull the lever much further back or harder in order to get the same stopping power you once had. This is partly why new bikes come with a first free service. If your brakes start feeling a little spongy after a few weeks, you can adjust them at the barrel or the clamp or ask a mechanic at your local bike shop to do it for you.

DISC BRAKES

New disc brakes won’t deliver their full power until the rotor and pads have bedded in. SRAM has a really good guide for bedding in disc brakes: “Accelerate the bike to a moderate speed and then firmly applying the brakes until you are at walking speed. Repeat this process 20 times. Then accelerate the bike to a faster speed and apply the brakes until you are at walking speed. Repeat this process ten times. It’s important that during this process you never come to a complete stop or lock up the wheels at any point.” Doing this process should drastically improve the performance of your brakes and prepare them for many happy rides.

CRANKS

Check the cranks and crank bolts or nut for tightness; grab a crank arm in each hand and try to wiggle them to check for looseness. If there is play in the cranks, the nuts or bolts may need to be tightened. Cranks should be checked after every ride for the first week.

HEADSET

A loose headset can be diagnosed by turning the front wheel to point left or right, holding the front brake on, and then rocking the bike backwards and forwards. Hold your fingers between the stem and the frame. Any movement indicates that you need to tighten the headset.

SADDLE

Check your seat post is not loose and that you have not exceeded the limit marked on the seat post. Once you have checked these, use an allen key to tighten the seat post clamp. Check the seat is secure by giving it another check once you have finished.

STEM

Check that your front wheel and stem do not move independently, and that your handlebar clamp bolts are tight. Perform this check by standing in front of the bike, holding the front wheel between your knees, and twisting the handlebars. You can prevent any movement by tightening the stem bolts and the handlebar clamp with an allen key.

SUSPENSION FORKS

Keeping your mountain bike’s suspension maintained is one of the best ways to ensure you’re getting all the performance you can out of your bike. Plus, giving your fork and shock a few seconds of attention here and there can prevent costly repairs or even replacements.

Dirt is the number one enemy of suspension. After every ride make sure to wipe the seal area and stanchions of your fork and shock. Wipe in a horizontal motion, not vertical as you don’t want to force any debris towards the seals.

Every few rides double check that your suspension sag is correct, as well as your rebound and compression adjustments. If something has changed, or the adjustments aren’t working as before, some maintenance is likely due.

Working on your bike at home can seem daunting, and we'd always recommend you take your bike to a qualified mechanic if possible.