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Carbon full-suspension mountain bike Trek Top Fuel 9.9 XTR Di2 dark star 12-speed

Carbon full-suspension mountain bike Trek Top Fuel 9.9 XTR Di2: Shimano XTR Di2, Pike Ultimate, 13.10 kg in M

$12,541.26 Incl. Tax

~~$13,532.72~~ MSRP

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Color

Black

Size

Size charts

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Description
Product Details

Trek Top Fuel 9.9 XTR Di2 Dark Star: speed at the highest level

The Gen 4 Trek Top Fuel 9.9 XTR Di2 brings together an OCLV Mountain carbon frame, the Shimano XTR Di2 electronic drivetrain, a 130 mm RockShox Pike Ultimate fork and a Fox Factory shock, weighing 13.10 kg in size M. An e*thirteen carbon chainset, Line Pro 30 wheels and a Fox Transfer NEO post complete this top-level build. It wears the Dark Star colour, a deep, understated black.

Technical specifications

Frame	OCLV Mountain carbon, internal storage, 4-position Mino Link, ABP, down tube protection, Boost148, 120-130 mm
Suspension	RockShox Pike Ultimate Charger 3.1 RC2, 130 mm / Fox Factory Float 2-position 185x50 mm
Drivetrain	Shimano XTR Di2 M9250 1x12, XTR M9200 10-51 cassette, e*thirteen TRS Race carbon 30T chainset
Brakes	Shimano M9220 4-piston, MT905 180 mm rotors
Wheels / tyres	Bontrager Line Pro 30 / Gunnison RSL XT 27.5x2.40 Tubeless Ready (size S)
Cockpit	Bontrager Line Pro carbon 780 mm handlebar, Line Pro 35 mm stem
Saddle / seatpost	Verse Short Pro carbon rails / Fox Transfer NEO 150 mm (size S)
Weight	13.10 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ OCLV Mountain carbon	✓ Shimano XTR Di2
✓ Fox Factory shock	✓ Fox Transfer NEO post
✓ Line Pro 30 wheels	✓ 13.10 kg in size M

Who is it for?

For the demanding rider who wants the best of Shimano technology on a downcountry bike, and who rides fast both uphill and downhill. It is aimed at marathon racers and enthusiasts for whom every detail counts.

The LVR workshop view

OCLV Mountain carbon dressed in XTR Di2. This Top Fuel 9.9 combines the Gen 4 carbon frame, reinforced where rocks strike, with the brand-new electronic Shimano XTR Di2. Internal storage, four-position Mino Link and ABP pivot are all still there; the e*thirteen carbon chainset and Line Pro 30 wheels complete a top-level build. Frame covered by Trek's lifetime warranty.

	OCLV Mountain (Top Fuel 9.x)	Alpha Platinum (Top Fuel 8)	Alpha Platinum (Top Fuel 5, Gen 3)
Level	Trek's mountain bike carbon	High-end aluminium	Same alloy, previous generation
Construction	OCLV layup tuned to absorb impacts	Hydroformed tubes, smoothed welds	Gen 3 frame, Knock Block 2.0
Reference bike	Top Fuel 9.9 XTR Di2: 13.10 kg (M)	Top Fuel 8: 14.58 kg (M)	Top Fuel 5: 15.60 kg (M)
What it means	Sharper acceleration, lifetime frame warranty	Tough, less worrying in a crash	Entry into lightweight full-suspension trail riding

Put simply: 13.10 kg, which is 900 g less than the 9.8 XT Di2 with the identical frame. The whole difference comes from the components: XTR, carbon chainset, high-end wheels and suspension.

XTR Di2 is Shimano's top electronic groupset: ultra-precise shifts, even under full load, and no derailleur cable to maintain. We handle its configuration and updates in the workshop, with a drivetrain check at every service.

The Pike Ultimate and the two-position Fox Factory Float make a very effective pairing: the fork stays precise in the rock gardens of the Caroux, and the shock firms up with a flick for long fire-road climbs. The Fox Transfer NEO post offers 150 mm of travel, generous on a size S.

Which Top Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Top Fuel 8	Alpha Platinum alloy	120 / 130 mm	Shimano SLX/XT 1x12	14.58 kg
Top Fuel 9.8 XT Di2	OCLV Mountain carbon	120 / 130 mm	Shimano XT Di2 1x12	14.00 kg
Top Fuel 9.9 XTR Di2	OCLV Mountain carbon	120 / 130 mm	Shimano XTR Di2 1x12	13.10 kg
Top Fuel 9.9 XX AXS	OCLV Mountain carbon	120 / 130 mm	SRAM XX AXS T-Type 1x12	12.85 kg

Our take: 900 g less than the 9.8 XT Di2 with the identical frame. The 9.9 XX AXS drops further to 12.85 kg with a one-piece cockpit and the SRAM ecosystem.

LVR sizing advice

Offered here in S (155 to 165 cm), on 27.5-inch wheels. Notably, the Fox Transfer NEO post offers 150 mm of travel even on this small frame; we check together that the saddle goes low enough for you.

Size	S
Rider height (cm)	155-165
Inseam (cm)	74-78
Wheels (inches)	27.5
Dropper post (mm)	150

Source: Trek size guide. Bike fitting available in our Béziers shop.

Your questions

XTR Di2 or XX AXS?	A matter of preference: Shimano for the shifting feel, SRAM for the complete wireless ecosystem.
What is the Fox Transfer NEO post?	A high-end Fox dropper post, here with 150 mm of travel in size S.
For racing?	Yes in marathons and long-distance events; it stays comfortable over very long distances.
Di2 maintenance?	Regular charging and firmware updates, which we carry out in the workshop.

The LVR Cycles verdict

A top-level Top Fuel that pairs XTR Di2 with high-end suspension at 13.10 kg. Its Dark Star black underlines its exclusive character.

Pros
+ Electronic Shimano XTR Di2
+ 13.10 kg in size M
+ Fox Transfer NEO 150 mm post

Cons
- Only available here in size S
- More specialised maintenance

Why buy from LVR Cycles? As a Trek retailer in Béziers, we prepare your Top Fuel 9.9 in the workshop, configure the XTR Di2 and fine-tune the suspension to your weight.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.

Reference TRK-5333157

Data sheet