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Carbon full-suspension electric mountain bike Trek Rail+ 9.8 XT Di2 dark star/lithium marble 12-speed

Carbon full-suspension electric mountain bike Trek Rail+ 9.8 XT Di2: Bosch CX 800 Wh, Fox Factory 160 mm, 23.98 kg

Kč187,303.22 Incl. Tax

Color

Black

Size

Size charts

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Trek Rail+ 9.8 XT Di2 Dark Star/Lithium Marble: Fox Factory suspension for fine-tuning

The Trek Rail+ 9.8 XT Di2 brings together an OCLV Mountain carbon main frame, 160 mm Fox Factory 38 GRIP X2 and Float X suspension, a Shimano XT Di2 drivetrain and the Bosch Performance Line CX motor with its 800 Wh battery. Trek quotes 23.98 kg in size M. Its Dark Star/Lithium Marble colourway blends a deep black with light grey marbling.

Technical specifications

Frame	OCLV Mountain carbon main frame, removable RIB 2.0 battery, Motor Armor, adjustable head angle, Mino Link, adjustable suspension leverage, UDH, Boost148
Motor	Bosch Performance Line CX, 250 W rated, assist up to 25 km/h
Battery	Integrated, removable Bosch PowerTube 800 Wh (RIB 2.0)
Suspension	Fox Factory 38 GRIP X2 160 mm / Fox Factory Float X 205 x 65 mm, 160 mm
Drivetrain	Wireless Shimano XT Di2 M8260 12-speed, XT M8200 10-51 cassette, XT chain
Brakes	Shimano XT M8220 4-piston hydraulic, RT-6B750 200 and 220 mm rotors
Wheels / tyres	Bontrager alloy hubs, Rapid Drive 108 freehub
Cockpit	35 mm handlebar, Bontrager Elite 45 mm stem, Trek Line Elite grips
Saddle / seatpost	Verse Short Comp / Line Dropper 150 to 200 mm depending on size
Weight	23.98 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ Fox Factory 38 GRIP X2	✓ Wireless Shimano XT Di2
✓ Bosch CX, PowerTube 800 Wh	✓ XT 4-piston brakes, 220 mm rotor
✓ OCLV Mountain carbon	✓ 23.98 kg in size M

Who is it for?

For the experienced mountain biker who likes to fine-tune their suspension and can feel the difference between two clicks of compression. It is aimed at riders who ride varied terrain and want to adapt their bike to every ride.

The LVR workshop view

OCLV carbon, at the top of the Rail+ range. This 9.8 XT Di2 uses the 5th-generation OCLV Mountain main frame, compacted under heat for high stiffness and controlled weight, and pairs it with Fox Factory suspension, the most adjustable in the range. Despite the 800 Wh battery, the whole bike stays at 23.98 kg in M; the frame carries Trek's lifetime warranty.

	Carbon Rail+ (9.7 / 9.8)	Aluminium Rail+ (5 / 8)	Carbon Slash+ (TQ)
Frame	OCLV Mountain main frame	Alpha Platinum	OCLV Mountain
Drive system	Bosch CX, PowerTube 800 Wh	Bosch CX, PowerTube 800 Wh	TQ HPR60, 580 Wh
Weight (M)	23.73 to 24.18 kg	24.78 to 25.08 kg	21.58 to 21.83 kg
What it means	Lighter chassis, same motor	Gentler budget, robust frame	Gentler assist, livelier bike

Put simply: the Rail+ 9.8 XT Di2 is the most accomplished in the series, with Fox Factory, an electronic Shimano drivetrain and XT brakes; it weighs 200 g less than the 9.8 GX AXS.

The Fox 38's GRIP X2 damper separates compression and rebound into high and low speed: the fork stays firm under load without becoming harsh over fast hits. The Float X Factory applies the same logic at the rear. We start from how the bike feels to you on a reference trail to find your settings, then make a note of them.

The Shimano XT Di2 derailleur shifts electronically; it stays precise even under the push of the Bosch CX, which cuts its assist at 25 km/h, as the European rule requires for a 250 W rated motor. The four-piston XT brakes and their 200 and 220 mm rotors offer a consistent lever feel on long descents.

Which Rail+ should you choose?

Model	Motor / battery	Rear / front travel	Drivetrain	Weight (M)
Rail+ 9.7 Eagle 70	Bosch CX / 800 Wh	160 / 160 mm	SRAM Eagle 70 12-speed	23.88 kg
Rail+ 9.8 GX AXS	Bosch CX / 800 Wh	160 / 160 mm	Wireless SRAM GX AXS	24.18 kg
Rail+ 9.8 XT Di2	Bosch CX / 800 Wh	160 / 160 mm	Wireless Shimano XT Di2	23.98 kg
Slash+ 9.9	TQ HPR60 / 580 Wh	170 mm fork	Wireless SRAM X0 AXS	21.83 kg

Our take: this Rail+ 9.8 XT Di2 weighs 23.98 kg in M, 200 g less than the Rail+ 9.8 GX AXS (24.18 kg), with more adjustable Fox Factory suspension. The TQ-powered Slash+ 9.9 drops to 21.83 kg.

LVR sizing advice

Four sizes from S to XL; the dropper grows with the frame, from 150 mm in S to 200 mm in L and XL. Torn between two sizes? The smaller one makes this 24 kg bike easier to place, the larger one more composed at high speed.

Size	S	M	L	XL
Rider height (cm)	155-165	165-177	177-188	188-195
Inseam (cm)	74-78	79-83	84-89	89-91
Dropper post (mm)	150	170	200	200

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

Your questions

What does the GRIP X2 damper change?	Separate high and low-speed adjustments, for a fork that is both firm and supple.
Is Di2 easy to set up?	Yes, the electronic drivetrain is configured in the workshop; we check the indexing when we hand the bike over.
Can the geometry be adjusted?	Yes, the head angle, Mino Link and suspension leverage can be adjusted in the workshop.
Is the marbled black discreet?	Dark Star dominates; the light grey Lithium marbling appears as a detail on the frame.

The LVR Cycles verdict

The most accomplished Rail+ for the demanding rider, with highly adjustable Fox Factory suspension and an electronic drivetrain. The black marbled with light grey gives it a polished elegance.

Pros
+ Fox Factory GRIP X2
+ Shimano XT Di2
+ 23.98 kg in size M

Cons
- Fox settings take some getting used to
- Standard cockpit for a high-end bike

Why buy from LVR Cycles? As a Trek retailer in Béziers, we set up the Fox Factory suspension with you, configure the Di2 and handle Bosch motor updates for your Rail+.

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-5348432

Data sheet