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PowerflyFS4 8EQEU XL 29 Mercury/Dark Web
PowerflyFS4 8EQEU XL 29 Mercury/Dark Web
Trek

PowerflyFS4 8EQEU 2

£4,400.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

RETURNS

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Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can't offer you a store credit or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging, and must have all labels and tags attached. We cannot accept any returns without proof of purchase, this could be a paper receipt or a digital one registered to your customer account.

Several types of goods are exempt from being returned. Perishable goods such as food.

Additional non-returnable items:

  • Gift cards / Vouchers
  • Downloadable software products
  • Some health and personal care items

To complete your return, we require a receipt or proof of purchase.

Please do not send your purchase back to the manufacturer.

Store Credit Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your store credit.

If you are approved, then your store credit will be processed, and a credit will automatically be applied to your customer account within a certain amount of days.

Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please contact us at bangor@evolution-bikes.co.uk.

Sale items (if applicable)

Only regular priced items may be refunded, unfortunately sale items cannot be refunded.

Exchanges (if applicable)

If you need to exchange an item, send us an email bangor@evolution-bikes.co.uk, once you have had a confirmation of the return send your item to:Evolution Bikes, Cyttir Lane,Bangor,Gwynedd,LL57 4DA.

Gifts

If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a store credit to the gift giver and he will find out about your return.

Shipping

To return your product, you should mail your product to:Evolution Bikes, Cyttir Lane,Bangor,Gwynedd,LL57 4DA.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive store credit or a refund, the cost of return shipping will be deducted from your store credit or refund.

Your refund will be processed once the items have been inspected once returned to us. All items must be retuned in as new condition for a full refund,.

Depending on your location, the time it may take for your exchanged product to reach you, may vary.

PowerflyFS4 8EQEU 2

Season:2026

Brand:Trek

Code:57352GRY

The powerfly fs+ 4 800wh equipped is a full-power full suspension electric mountain bike for taking on alpine adventures. Its powerful bosch motor gives you a boost for soaring up climbs, while a massive 800 wh battery keeps you going through your longest adventures. A Rockshox suspension package (120 mm rear, 130 mm front) smooths out rough trails, and a 10-speed Shimano cues drivetrain delivers clean-shifts for any kind of trail. It comes ready for any adventure, with included mudguards, lights, a rear rack and kickstand.- the powerfly fs+ gives you the powerful boost you crave on high alpine climbs, confident comfort on descents and a big battery for getting far out there- bosch's performance line cx motor delivers plenty of torque for steep, punchy climbs and is easy to control with the purion 200 remote â plus you can customise it in the ebike flow app- its RIB 2.0 removable integrated battery is easy to remove for travel and storage, and its virtually rattle-free while you ride- want even more boost? With the bosch e-bike flow app, you can increase torque to 100 nm and peak power up to 750w.- it's compatible with bosch powermore booster batteries. Parts can be retrofitted by the dealerremovable integrated batteryrib 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. Itâs the most convenient way to remove your battery for transport, security or just easier charging.Bosch performance line cx motorthe 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.Bosch led remotethe bosch smart system led remote lets you easily change assist modes, activate walk mode or turn on optional lights. The bright leds are easy to see in any light, and show you your battery level and assist mode at a glance.Bosch kiox 300 displaythe bosch kiox 300 is tough, compact and easy to read with a full-colour display. Keep ride data right where you can see it including rider power, motor output, speed, remaining range and more.Adventure-ready accessoriesthe powerfly equipped gives you maximum utility thanks to pre-installed accessories. You get a kickstand, front and rear lights, plus mudguards and a rear rack custom made for clean integration.A better way to produce aluminiumstarting in 2024, we began removing high-emission aluminium from our manufacturing and replacing it with low-emission aluminium made with renewable energy. By october 2025, nearly every alloy bike we make â this one included â had made the switch, driving a major drop in our footprint
Technical Information
Frame
Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered headtube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34.9 mm seat tube, ABP, UDH, rack and mudguard mounts, Boost 148, 120 mm travel
Fork
RockShox Recon Silver, Solo Air spring, Motion Control damper, lockout, tapered steerer, 42mm offset, Boost110, Maxle Stealth, mudguard mounts, 130mm travel
Shock
RockShox Deluxe Select R, 210x50 mm

Hub front
Shimano TC500 alloy, CentreLock, 110x15 mm thru axle
Hub rear
Shimano TC500 alloy, CentreLock, 148x12 mm thru axle
Skewer rear
*Rim
Spokes
14 g stainless steel, black
*Tyre
Size:S
Bontrager Gunnison Pro XR, Tubeless-Ready, wire bead, 60 tpi, 27.5x2.40"
Size:M , L , XL
Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40"
Rim strip
Max tyre size
Frame: 29x2.50" (S: 27.5x2.50"), Fork: see manufacturer

Battery
Bosch PowerTube 800 Wh, smart system
Charger
Bosch standard 2A, 230V, smart system
Computer
Bosch Purion 200
Motor
Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)

Shifter
Shimano U6000, 10-speed
Rear derailleur
Shimano CUES U6000 GS
Crank
FSA Bosch CK-220, 36T ring, 165 mm length
Chainring
Cassette
Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed
Chain
Shimano LG500, 9/10/11-speed
Pedal
Max. chainring size
1x: 38T

Saddle
*Seatpost
Size:S
Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 31.6 mm, 310 mm length
Size:M , L , XL
Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 31.6 mm, 450 mm length
Handlebar
*Grips
Size:S , M , L , XL
Bontrager XR Trail Comp, nylon lock-on
Head set
FSA IS-2, 1-1/8" top, 1.5" bottom
Brake
Tektro Gemini SL 4 piston hydraulic brake
Brake rotor
Tektro, CentreLock, 203 mm
Rotor size
Max brake rotor sizes – Frame: 220 mm, min 180 mm, Fork: see fork manufacturer

*Light
Size:S , M , L , XL
Supernova Mini 3 pure, LED, headlight
Size:S , M , L , XL
Supernova TL3 Mini, LED
Kickstand
Pletscher Comp Flex 18
Cargo rack
*Mudguard

Weight
M - 27.41 kg / 60.43 lbs (with TLR sealant, no tubes)
Weight limit
This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Sizing Information
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