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The Top Fuel 9 Gen 4 is an alloy trail bike that's ready to billy-goat up long climbs and rip back to the bottom for another lap.
The Top Fuel 9 Gen 4 is an alloy trail bike that's ready to billy-goat up long climbs and rip back to the bottom for another lap.
Trek

2025 Trek Top Fuel 9 Gen 4 Mountain Bike in Juniper Green

£4,500.00
Size Guide
Pre-Order

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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

Hassle free returns

RETURNS POLICY

If you'd like to exchange or return your order please include your name and order number with the return, our returns address is:

Returns
Activ Cycles
Unit 1&2 Kingfisher Business Park
Henwood
Ashford
TN24 8DG

Subject to the terms set out below we are happy to offer a refund or exchange on all goods except goods which are special orders or nutrition products, or where we have expressly advised you that there is no right to return the goods ordered (save in the event the goods are faulty) provided the goods are returned to us within 14 days of delivery to you.

If you return goods to us and request a different size or alternative product we will send it out free of charge (subject to stock availability). If you require a refund (or the replacement item is not in stock) we aim to process refunds within 2 working days of receipt of the goods. It is your responsibility to ensure that the item is returned to us safely and securely and in saleable condition.

Refunds will be processed using the same method of payment used for the original purchase. Due to the high incidence of fraud, we regret that we are unable to offer any refund without a valid receipt/delivery note.

If the product is faulty or wrong due to a mistake on our part then we will send out replacements free of charge and supply you with a prepaid returns label. For all goods returned please include a letter giving details along with a copy of the original receipt. Returned goods must be unused and with all appropriate packaging and labelling intact.

Your rights to return goods are protected under the Consumer Protection (Distance Selling) Regulations 2000 which can be found at theConsumer Protection (Distance Selling) Regulations 2000 (legislation.gov.uk).

2025 Trek Top Fuel 9 Gen 4 Mountain Bike in Juniper Green

Season:2025

Brand:Trek

Code:46144GRN

The Top Fuel 9 Gen 4 is an alloy trail bike that's ready to billy-goat up long climbs and rip back to the bottom for another lap.

It gives you the rugged benefits of a lightweight aluminium frame, plus the upgrades you crave, like fully wireless shifting from SRAM's GX Eagle AXS transmission, 4-piston hydraulic brakes and a 120 mm/130 mm FOX suspension package.

It's right for you if...You like balance in most things you do – a combination of climbing power and descending confidence, nimble handling and full-suspension comfort, bike budget and component performance. You like the durability and affordability that an alloy frame offers and want upgrades where they matter most.

The tech you get - An Alpha Platinum Aluminium frame equipped with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. A 130 mm FOX Rhythm 34 fork with Float EVOL air spring and GRIP damper, plus 120 mm of rear travel from a Fox Performance Float DPS shock with a 3-position damper. It's topped off with a wireless electronic SRAM GX Eagle transmission, 4-piston hydraulic disc brakes, a Bontrager Line dropper post and Tubeless Ready Bontrager Line Comp 30 wheels.

The final word - The Top Fuel 9 Gen 4 is built for those who want the best of both worlds. It's a great choice for all-around trail riders who may start the day with a pedal fest, but end it with long descents. It delivers on upgrades where you want them most, like your suspension and group set, but keeps the price down with an alloy frame.

Features:
  • Its lightweight frame and versatile geometry make it the perfect choice for all kinds of rides and all kinds of riders
  • The 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride
  • You get the sweetest alloy build with a fully wireless SRAM transmission, upgraded suspension and a light yet rugged frame for all-mountain ripping
  • The Alpha Platinum Aluminium frame is robust, yet light, and packs in updated internal frame storage for easy access to gear and snacks
  • It's more upgrade-ready than ever, with room for bigger 140 mm forks and longer-stroke shocks for up to 130 mm of rear travel, plus room for extra-long dropper posts
Technical Information
  • Frame
    Alpha Platinum Aluminium, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120 mm travel
  • Fork
    Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 130 mm travel
  • Shock
    Fox Performance Float DPS, 2-position damper, 185 mm x 50 mm
  • Max Compatible Fork Travel
    140 mm
  • Wheel Front (Size: S)
    Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"
  • Wheel Front (Size: M, ML, L, XL)
    Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29"
  • Wheel Rear (Size: S)
    Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5''
  • Wheel Rear (Size: M, ML, L, XL)
    Bontrager Line Comp 30, Tubeless-Ready, Rapid Drive 54, 6-bolt, Boost148, 12 mm thru axle
  • Skewer Rear
    Bontrager Switch thru-axle, removable lever
  • Tyre (Size: S)
    Bontrager Gunnison Pro XR, Tubeless-Ready, wire bead, 60 tpi, 27.5x2.40"
  • Tyre (Size: M, ML, L, XL)
    Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40"
  • Tyre Part
    Bontrager TLR sealant, 180 ml/6 oz
  • Rim Strip
    Bontrager TLR
  • Max Tyre Size
    Frame: 29x2.50", Fork: See manufacturer
  • Battery
    SRAM eTap battery pack (with charger)
  • Shifter
    SRAM AXS POD
  • Rear Derailleur
    SRAM GX Eagle AXS, T-Type
  • Crank
    SRAM GX Eagle, T-Type, DUB, 30T, 55 mm chain line, 170 mm length
  • Bottom Bracket
    SRAM DUB MTB Wide, 73 m, BSA threaded
  • Cassette
    SRAM Eagle XS-1275, T-Type, 10-52, 12-speed
  • Chain
    SRAM GX Eagle, T-Type, 12-speed
  • Max. Chainring Size
    1x: 34T, min 30T
  • Saddle
    Verse Short Comp, steel rails, 145 mm width
  • Seatpost (Size: S)
    Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length
  • Seatpost (Size: M, ML, L, XL)
    Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length
  • Handlebar
    Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
  • Grips
    Bontrager XR Trail Comp, nylon lock-on
  • Stem
    Bontrager Elite, 35 mm, 0-degree, 45 mm length
  • Brake
    SRAM Level Bronze 4-piston hydraulic disc
  • Brake Rotor
    SRAM CentreLine, 6-bolt, round-edge, 180 mm
  • Rotor Size
    Max brake rotor sizes – Frame: 200 mm, min 180 mm, Fork: see fork manufacturer
  • Bag
    Bontrager BITS Internal Frame Storage Bag
  • Weight
    M - 14.38 kg / 31.71 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
Professional Opinion
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