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The Top Fuel 8 Gen 4 is perfect for riders who want one bike that can do it all — from big trail days and technical singletrack to endurance loops and weekend adventures.
The Top Fuel 8 Gen 4 is perfect for riders who want one bike that can do it all — from big trail days and technical singletrack to endurance loops and weekend adventures.
Trek

TREK Top Fuel 8 Gen 4 Full Suspension Mountain Bike in Fury Red

£3,200.00
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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
Earn Rewards
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.

Online Returns Policy

If you are not happy with any items purchased via our website, under Consumer Contracts Regulations you have the right to return any unused products for a refund within 30 days.

When the customer sends an item back to the company (or, when the company arranges for collecting from the customer), the company will process the returned item then notify the customer via email of the refund. The refund will be issued within 3 - 5 working days of the product being received by us, it may then take an additional 3 - 5 working days for the refund to be paid into the customers account.


If you’d like to return an item within the standard 30-day period and it’s in a suitable condition for resale,.

  1. Use Your Own Postage – Arrange your own return shipping back to us.

Please Note: Returns will only be accepted if they arrive back to us in original new condition, with all original packaging and tags still attached.

Please Note:We do not offer exchanges

Return Address:

Team Cycles LTD
Studio 11B
Second Avenue
Team Valley Trading Estate
Gateshead
NE11 0NF

For items returned within the cooling off period...

  • By law, customers have the right to withdraw from the purchase of an item within 14 working days of the date on which the item is delivered.
  • Where you are withdrawing from your purchase within the cooling-off period, and there has been no error on our part, we will refund the cost of the item.
  • The company will not refund the cost of delivery or other services provided to the customer in connection with the purchase.
  • The cost of delivery back to the company is the responsibility of the customer.
  • Where we collect an item from you, we reserve the right to recover the costs of collection from you.
TERMS AND CONDITIONS
  • Returned goods should be unused, in a saleable condition and in their original packaging with all labels still attached. Team Cycles is entitled to refuse the return or deduct from a refund as a result of the product not being in the above condition.
  • We are only able to exchange like for like products. If you require a different item, you will need to opt for a refund and place a new order. All returns must have a completed returns form.
  • We will refund you to your original payment method.
  • Customised items cannot be returned. *
  • Please do not send your purchase back to the manufacturer unless you have been advised to.
  • Team Cycles customers have 30 days from date of delivery to return their orders.
  • Once we have received the returned goods we will refund you, by the method you used to pay for your order. This may take 5-7 working days to appear as cleared funds.

*Faulty customised goods (or goods that have been altered in any way) will need to be returned for inspection as customisation may void your warranty and therefore faults may not be covered.

WARRANTY

All products ordered from Team Cycles come with a full warranty which covers manufacturing faults and defects in workmanship. If you feel that your purchase has developed a fault, please contact our store for an assessment. To do this you will need proof of purchase.

If taking your product in store is not an option then please email our team on [email protected]. Please include photographs of your product (please keep below 20mb), your web order number (or copy of receipt) so we can immediately start to assess the issue.

PLEASE NOTE:

In some cases, the manufacturer/supplier may require to see the item(s) before repair or replacement can take place. If this is the case, we will inform you and arrange how to do this. All used items being returned to us must be cleaned for hygiene purposes.

On receipt of your goods we will carry out a full inspection and contact you within three working days of receipt.

Finance

Team Cycles (North East) Limited acts as a broker and not the lender and offers finance from Secure Trust Bank PLC T/A V12 Retail Finance. Team Cycles (North East) Limited is authorised and regulated by the Financial Conduct Authority, Registration Number 623982. Not all products offered by Secure Trust Bank T/A V12 Retail Finance are regulated by the FCA. Subject to age, status and affordability, minimum spend applies.

TREK Top Fuel 8 Gen 4 Full Suspension Mountain Bike in Fury Red

Season:2026

Brand:Trek

Code:46143RED

The Trek Top Fuel 8 Gen 4 is a precision-crafted alloy trail bike that delivers the perfect mix of uphill efficiency and downhill control. With a dialed geometry, 130 mm front and 120 mm rear suspension, and a rugged-yet-lightweight Alpha Platinum Aluminium frame, it’s ready to crush technical climbs and flow through fast descents — all without blowing your budget.

It’s kitted with thoughtful component upgrades where they count, including a Shimano XT/SLX 12-speed drivetrain for crisp shifting, and a Fox Rhythm 34 fork for buttery-smooth control on rough terrain. Agile yet stable, fast yet composed — the Top Fuel 8 Gen 4 is a true all-rounder for modern trail riders.


Key Features

  • 130 mm Front / 120 mm Rear Travel
    Ideal trail geometry for speed, control, and all-day rideability

  • Alpha Platinum Aluminium Frame
    Lightweight and tough, with internal cable routing and sleek lines

  • Shimano XT/SLX 12-Speed Drivetrain
    Smooth, reliable shifting for tackling varied terrain

  • Fox Rhythm 34 Fork
    Proven performance and tunability for technical trails

  • Tubeless-Ready Wheels and Tyres
    Run lower pressures for grip and fewer flats

  • Dropper Post Included
    Get low on descents for better control and flow


Who It’s For

The Top Fuel 8 Gen 4 is perfect for riders who want one bike that can do it all — from big trail days and technical singletrack to endurance loops and weekend adventures. It's the ideal blend of speed, stability, and smart value for riders who demand versatility.

Road Cycling Clothing available at Team Cycles Bike Shop
Fox MTB Clothing | Ready for Every Trail Hit the trails in Fox MTB gear. Jerseys, jackets and shorts built for performance, durability and comfort so you can ride harder and longer. Suitable for beginners and pros alike. SHOP NOW
Technical Information

Please note – spec applies to all sizes unless listed separately

Frameset

Frame: Alpha Platinum Aluminium, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino 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: Sizes S, M, ML, L, XL: Fox Performance Float DPS, 3-position damper, 185 mm x 50 mm / Fox Performance Float, 185 mm x 50 mm
Max compatible fork travel: 140 mm


Wheels

Wheel front:
Size S: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"
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, 12 mm thru axle, 27.5"
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"
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


Drivetrain

Shifter: Shimano XT M8100, 12-speed
Rear derailleur: Shimano XT M8100, long cage
Crank: Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length
Bottom bracket: Shimano BB-MT501 BSA
Cassette: Shimano SLX M7100, 10-51T, 12-speed
Chain: Shimano SLX M7100, 12-speed
Max. chainring size: 1x: 34T, min 30T


Components

Saddle: Bontrager Verse P3, chromoly rails
Seatpost:
Size S: Bontrager Line Dropper, 100 mm travel, MaxFlow, internal routing, 34.9 mm, 310 mm length
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 / Trek Line Comp, nylon lock-on (Sizes S, M, ML, L, XL)
Stem: Bontrager Elite, 35 mm, 0-degree, 45 mm length
Brake: Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper
Brake rotor: Shimano RT66, 6-bolt, 180 mm
Rotor size: Max brake rotor sizes – Frame: 200 mm, min 180 mm, Fork: see fork manufacturer
Accessories: Bontrager BITS Internal Frame Storage Bag


Weight

Weight: M – 14.58 kg / 32.15 lb (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
size-table
SizeRider HeightInseam
S

155 - 165 cm

5'1" - 5'5"

74 - 78 cm

29" - 31"

M

165 - 176 cm

5'5" - 5'9"

79 - 83 cm

31" - 33"

ML

173 - 180 cm

5'8" - 5'11"

81 - 86 cm

32" - 34"

L

177 - 188 cm

5'10" - 6'2"

84 - 89 cm

33" - 35"

XL

188 - 195 cm

6'2" - 6'5"

89 - 91 cm

35" - 36"

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