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Trek Top Fuel 9.8 XT Di2 Gen 4 is a lightweight carbon trail bike with Shimano XT Di2, RockShox 120/130 mm suspension, and adjustable Mino Link geometry.
Trek Top Fuel 9.8 XT Di2 Gen 4 is a lightweight carbon trail bike with Shimano XT Di2, RockShox 120/130 mm suspension, and adjustable Mino Link geometry.
Trek

Trek Top Fuel 9.8 XT Di2 Gen 4 Full Suspension Mountain Bike 2026 in Matte Sedona Red/Pennyflake

£5,500.00
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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
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Trek Top Fuel 9.8 XT Di2 Gen 4 Full Suspension Mountain Bike 2026 in Matte Sedona Red/Pennyflake

Season:2026

Brand:Trek

Code:52231RD-OG

The Top Fuel 9.8 XT Gen 4 is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. It gives you the confidence you want through roots and rocks, thanks to a 120 mm/130 mm RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you get clean shifts from a 12-speed Shimano XT Di2 drivetrain.

It's right for you if...
You're after a carbon trail bike that keeps weight to a minimum without compromising on capability. You like to ride everything – long alpine climbs, rooty aspen slalom, fast XC singletrack and you want a bike that can keep up on the ups and hold its own on the downs. Keeping things light with a carbon frame is important to you, and you want the light yet precise shifting of a Shimano XT drivetrain.

The tech you get
An OCLV Mountain Carbon frame with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. 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 Shimano XT 12-speed drivetrain, Shimano XT 4-piston hydraulic brakes, Bontrager Line dropper post and tubeless-ready Bontrager Line Comp 30 wheels.

The final word
If you're after a light carbon trail bike that balances a playful and capable ride, reach for Top Fuel 9.8 XT Gen 4. 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 clean shifts from a Shimano XT drivetrain and a sweet RockShox suspension package.

Key Features & Benefits:

  • Carbon Fibre Frame:Keeps weight to a minimum without compromising on capability.
  • Frame Storage:In-frame storage with an improved BITS bag system makes it easy to stash tools, tubes and snacks
  • RockShox Suspension:With 120 mm rear and 130 mm front RockShox suspension, you get a well-balanced ride that stays efficient on the ups and playful on descents

Full Specification:

  • Frame:OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120 mm travel
  • Rear Shock:RockShox Deluxe Ultimate RCT, 185 mm x 50 mm
  • Fork:RockShox Pike Select+ 130mm fork with DebonAir spring, and Charger 3.1 RC2 damper,
  • Number of Gears:12
  • Gear Shifters:Shimano XT M8250 Di2, 12-speed
  • Chainset:Shimano XT 8200, 30T, 55 mm chain-line, 170 mm length
  • Chainrings:30T (max: 34T)
  • Rear Cassette:Shimano XT M8200, 10-51, 12-speed
  • Chain:Shimano XT M8100, 12-speed
  • Rear Derailleur:Shimano XT M8250, long cage
  • Bottom Bracket:Shimano BB-MT501 BSA
  • Pedals:Not supplied:Shop pedals here
  • Rims:Bontrager Line Comp 30
  • Front Hub:
  • Rear Hub:
  • Front 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"
  • Rear 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"
  • Brakes:ShimanoXT M8200 4-piston hydraulic disc, Shimano RT86, 6-bolt, 180 mm
  • Handlebars:Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width
  • Handlebar Grips: Trek Line Elite, Lock On
  • Stem:Bontrager Line Pro, 35 mm, Blendr-compatible, 0-degree, 35 mm length
  • 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, Size: M, ML - Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length, L, XL - Bontrager Line Dropper, 200 mm
  • Weight:M - 13.68 kg / 30.66 lbs (with TLR sealant, no tubes), This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Size Guide for Trek Top Fuel

SizeRider HeightRider HeightInseamInseam
S155 - 165 cm5'1" - 5'5"74 - 78 cm29" - 31"
M165 - 176 cm5'5" - 5'9"79 - 83 cm31" - 33"
M/L173 - 180 cm5'8" - 5'11"81 - 86 cm32" - 34"
L177 - 188 cm5'10" - 6'2"84 - 89 cm33" - 35"
XL188 - 195 cm6'2" - 6'5"89 - 91 cm35" - 36"
2XL195 - 203 cm6'5" - 6'8"91 - 97 cm36" - 38"

Geometry Information for Trek Top Fuel Gen 4

Geometry Information for Trek Top Fuel Gen 4

Frame size letterSSMMMLMLLLXLXL
Geometry positionHighLowHighLowHighLowHighLowHighLow
Wheel size29"29"29"29"29"29"29"29"29"29"
A — Seat tube36364141424243.543.54747
B — Seat tube angle69.5°69.0°70.5°70.0°70.5°70.0°70.5°70.0°70.5°70.0°
Effective seat tube angle76.5°76.0°77.3°76.9°76.6°76.2°76.3°75.9°75.6°75.2°
C — Head tube length10.510.510.510.5111111.511.513.513.5
D — Head angle65.9°65.5°65.9°65.5°65.9°65.5°65.9°65.5°65.9°65.5°
E — Effective top tube55.855.958.758.861.161.26363.167.267.3
G — Bottom bracket drop11.62.63.22.63.22.63.22.63.2
H — Chainstay length43.443.543.443.543.94443.94444.444.5
I — Offset4.34.34.34.34.34.34.34.34.34.3
J — Trail11.111.512.112.512.112.512.112.512.112.5
K — Wheelbase115115.1118.8118.8121121122.7122.7127127.1
L — Standover70.57075.57575.5757675.576.576
M — Frame reach42.241.745.244.746.746.248.247.751.250.7
N — Frame stack56.65759.960.360.460.760.861.262.663

Warranty Information for Trek:

Lifetime warranty on Frame sets (frame and rigid fork), main frame and full suspension swing arms for the lifetime of the original owner, and Bontrager wheels with carbon rims.

2-year warranty on Rear suspension linkage components, including bearings, rocker link and accompanying hardware and components, Bontrager wheels with alloy rims, Paint and transfers.

For full warranty policy please visit trekbikes.com

Sizing Information
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