2023 Trek Fuel EX 9.8 XT Gen 6 Full Suspension Mountain Bike
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The Fuel EX 9.8 XT is an all-around trail bike that blends the light, smooth ride of a carbon frame with upgraded parts made for hard rides. Decked out with 150 mm of front and 140 mm rear FOX Performance suspension, you'll be ready to float through the tough stuff, while carbon wheels keep you tracking through rowdy terrain. A Shimano XT drivetrain tops things off for precise shifting for power on descents and relief on long climbs.
You're chasing long flowy and technical descents, and want to pedal back to the top for more, lap after lap. You want the vibration-damping benefits of a carbon frame and carbon wheels, plus upgraded suspension that smooths out the rough and rowdy.
A light and stiff carbon frame with a full FOX Performance suspension package that smooths out rowdy rock gardens and root latices. Plus, carbon wheels that keep your set-up light, while a Shimano XT drivetrain for smooth shifting and brake modulation. Finally, you'll find adjustable geometry and in-frame storage for keeping your set-up dialled just for you.
The Fuel EX 9.8 is the culmination of years of trail riding and progression, with longer front end geometry for tackling steeper and hairier descents, and a steeper seat tube to keep you perched on climbs. It's equipped with the cherry-picked components you want, like upgraded suspension, carbon wheels and a Shimano XT drivetrain.
- You'll get the light weight and vibration-damping benefits of a full carbon frame, and geometry built to handle anything
- It comes with light and stiff carbon wheels that make quick work of technical terrain and keep you on your line, even when things get hairy
- With the adjustable angle headset (angled cups sold separately) and Mino Link, you can choose from six different geometry configurations
- We expanded our size range to ensure a better fit for all riders, and use the best-fitting wheels for each frame size: XS frames get 27.5? wheels, S frames get to choose between 27.5? or 29?, and sizes M and up get 29? wheels
- You get the precise shifting and brake modulation of a Shimano XT drivetrain, plus the simple reliability of a threaded bottom bracket
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
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, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, guided internal routing, magnesium rocker link, 34.9 mm seat tube, ISCG 05, 55 mm chain line, BSA 73, downtube guard, shuttle guard, ABP, UDH, Boost148, 140 mm travel
Fork - Fox Performance 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 150 mm travel
Shock - Fox Performance Float X, 2-position damper, 185 mm x 55 mm
Wheel front - Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle
Wheel rear - Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru axle
Hub front - Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
Hub rear - Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano MicroSpline freehub, Boost148, 12 mm thru axle
Skewer rear - Bontrager Switch thru-axle, removable lever
Rim - Bontrager Line Elite 30, Tubeless-Ready
Tyre - Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi
Tyre part - Bontrager TLR sealant, 180 ml/6 oz
Rim strip - Bontrager TLR
Shifter - Shimano XT M8100, 12-speed
Rear derailleur - Shimano XT M8100, long cage
Crank - Shimano XT M8120, 30T, 55 mm chainline, 170 mm length
Bottom bracket - Shimano BB-MT501 BSA
Cassette - Shimano XT M8100, 10-51, 12 speed
Chain - Shimano XT M8100, 12-speed
Saddle - Bontrager Arvada, austenite rails, 138 mm width
Seatpost - Bontrager Line Elite Dropper, 100 mm 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
Head set - Integrated cartridge bearing, 1-1/8" top, 1.5" bottom, angle adjust cup compatible
Brake - Shimano XT M8120 4-piston hydraulic disc
Brake rotor - Shimano RT76, 6-bolt
Bag - Bontrager BITS Internal Frame Storage Bag
Weight - Medium – 14.33 kg/31.6 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).
Please note: Manufacturers can sometimes change the specification of the products from time to time.
| Colours | DEEP SMOKE, MULSANNE BLUE, SATIN BAJA YELLOW |
| Sizes | L - 29 WHEEL, M - 29 WHEEL, ML - 29 WHEEL, S - 27.5 WHEEL, S - 29 WHEEL, XL - 29 WHEEL, XS - 27.5 WHEEL |
| Brand | Trek |
| Model Year | 2023 |
| Barcodes | 601842739068, 601842739075, 601842739082, 601842739099, 601842739105, 601842739112, 601842739129, 601842739334, 601842739341, 601842739358, 601842739365, 601842739372, 601842739389, 601842739396, 601842739402, 601842739419, 601842739426, 601842739433, 601842739440, 601842739457, 601842739464 |
| SKUs / Part Numbers | 5272281, 5272282, 5272283, 5272284, 5272285, 5272286, 5272287, 5272288, 5272289, 5272290, 5272291, 5272292, 5272293, 5272294, 5272337, 5272338, 5272339, 5272340, 5272341, 5272342, 5272343 |
Why buy from Cycles UK?
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Cycles UK provides 14 days of free insurance on all new bikes sold to UK customers. As part of our service, your new bike is automatically covered with 14 days’ FREE insurance against theft and accidental damage.
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Opinions of contact points such as saddles, shoes and grips can vary a lot between different riders. If you buy a contact point from Cycles UK and you don’t find it comfortable, you can return it within 30 days, and we’ll swap it for something else.
Trek Mountain Bike Size Guide
On most Trek mountain bikes the XS and S sizes will come with a 27.5" wheel while the M and above will come with a 29" wheel. The XXS size is generally a 26" wheel.
| Size | XXS | XS | S | M | M/L | L | XL | XXL |
| Rider Height (CM) | 134.6 - 144.7 | 145 - 154.6 | 155 - 164.75 | 165 - 172.5 | 172.75 - 180 | 180.25 - 187.75 | 188 - 195.25 | 195.5 - 203.25 |
| Rider Height (Feet and Inches) | 4' 4" - 4' 9.0" | 4' 9.1" - 5' 0.9" | 5' 1.0" - 5' 4.9" | 5' 5.0" - 5' 7.9" | 5' 8.0" - 5' 10.9" | 5' 11" - 6' 1.9" | 6' 2" - 6' 4.9" | 6' 5" - 6' 8" |
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