2025 Trek Top Fuel 9.8 GX AXS Gen 4 Full Suspension Mountain Bike

£6,500.00

Dispatched between 17th Feb and 19th Feb, if ordered before 2:00pm today.
Part Number:

5319447

GTIN/UPC:

601842985229

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The 2025 Trek Top Fuel 9.8 GX AXS Gen 4 Full Suspension Mountain Bike is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. These downcountry, or light trail, bikes are perfect for most UK riding.

The Top Fuel 9.8 is built around an OCLV Mountain Carbon frame with a 4-way Mino Link lower shock mount which allows you to tweak the geometry and suspension leverage rate. Suspension comes from a 130 mm RockShox Pike Select+ fork with DebonAir spring, and Charger 3.1 RC2 damper, plus 120 mm of rear travel from a RockShox Deluxe Ultimate RCT shock. A SRAM GX Eagle wireless transmission, SRAM Level Bronze 4-piston hydraulic brakes, Bontrager Line dropper post and tubeless-ready Bontrager Line Comp 30 wheels.

This bike is perfect for

Mountain bikers who want a light carbon trail bike that balances a playful and capable ride. Its ultra-lightweight frame pairs with a 4-way Mino Link lower suspension mount for taking control of your geometry and suspension feel. Plus, you get a wireless SRAM GX AXS transmission and sweet RockShox suspension package.

Key Features

  • The Top Fuel Gen 4 delivers with an intensely lightweight build, improved in-frame storage and more adjustability for all kinds of rides and riders
  • With 120 mm rear and 130 mm front RockShox suspension, it delivers a well-balanced ride that stays efficient on the ups and playful on descents
  • The 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride
  • In-frame storage with an improved BITS bag system makes it easy to stash tools, tubes 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

Mountain Bike Buying Guide

Mountain biking is an incredibly diverse sport. Mountain bikes now come in three main flavours. They are XC, Trail and Enduro.

XC – short for cross country, are quick race bikes. They will normally have 29” wheels and come with 100mm of suspension. If you are mainly going to be riding bridleways and natural trails in the South East of England, where our shops are, an XC bike will be the quickest and most efficient option.

Trail – these bikes are designed to be pedalled up and down hill and for use on bridleways and natural trails, but also at dedicated trail centres. They normally come with 130mm or 140mm of suspension travel and can have either 27.5” or 29” wheels, but 29” is quickly becoming the norm. Trail bikes are good all-rounders. They won’t be as fast as an XC bike on the flat but they can handle a lot more challenging terrain, and a few jumps. If you plan on taking your bike to trail centres in Wales, or to the Alps, then a trail bike may be your best option.

Enduro – enduro racing is a thing in and of itself but many people buy enduro bikes for ‘aggressive’ trail riding and uplift days at places like Bike Park Wales. This generally means challenging downhill trails with some big jumps. With around 160mm of suspension travel enduro bikes can take some big hits. They are designed to be efficient enough to pedal up hills but really come into their own when pointed downhill. You get enduro bikes in either 27.5” or 29” wheel sizes as well as mullet setups of 29 at the front and 27.5 at the back.


Men’s and women’s mountain bikes

Nearly all the mountain bikes we sell are now unisex. All of the big brands have gradually stopped doing dedicated men’s and women’s bikes over the last few years. Instead they are focussed on producing bikes in a bigger range of sizes. So, for instance, the Trek Marlin 5 is a unisex bike that now comes in sizes from XXS to XXL large. This means it will fit riders from 4’ 5” to 6’ 5” and everything in between.


Read our full mountain bike buyers guide


Price Match at Cycles uk

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Trek made their first bikes in 1976 in a barn in Wisconsin. Now they’re one of the biggest bike brands in the world. Trek bikes cover everything from professional-level road and mountain bike race bikes to commuters, hybrids and kids bikes. There is a strong heritage of racing at Trek and many Trek bikes have a strong race influence. They take a very scientific approach to researching bike and human performance and then make the fastest and most efficient bikes they can.

It doesn’t stop their attention and passion for cycling flows through everything they do. Since the 1990s, Trek has supported Places for Bikes. Places for Bikes is an advocacy organisation in the USA that gets more people on bikes more often! Places for Bikes ethos falls in line with the companies mission statement to:

Build only products we love. Provide incredible hospitality to our customers, and change the world by getting more people on bikes.

Frame - OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120 mm travel

Fork - RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 130 mm travel

Shock - RockShox Deluxe Ultimate RCT, 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". Size: M, ML, L, XL - Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''

Wheel rear - Size: S - Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5''. Size: M, ML, L, XL - Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''

Skewer rear - Bontrager Switch thru-axle, removable lever

Tyre - Size: S - Bontrager Gunnison RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40". Size: M, ML, L, XL - Bontrager Montrose RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi, 29x2.40"

Rim strip - Bontrager TLR

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

Saddle - Verse Short Comp, steel rails, 145 mm width

Seatpost - Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm

Handlebar/stem (integrated) - Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5 mm handlebar rise, 820 mm width, 0-degree stem rise

Grips - Bontrager XR Trail Elite, nylon lock-on

Brake - SRAM Level Bronze 4-piston hydraulic disc

Brake rotor - SRAM CentreLine, 6-bolt, round-edge, 180 mm

Bag - Bontrager BITS Internal Frame Storage Bag

Weight - Medium size - 13.10 kg / 28.89 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).

Colours MATTE DARK WEB
Sizes L, M, ML, S, XL
Brand Trek
Model Year 2025
Barcodes 601842985229, 601842985236, 601842985243, 601842985250, 601842985267
SKUs / Part Numbers 5319443, 5319444, 5319445, 5319446, 5319447

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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