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Aluminium full-suspension electric mountain bike Trek Rail+ 8 XT dark star 12-speed

Aluminium full-suspension electric mountain bike Trek Rail+ 8: Bosch CX 800 Wh, ZEB 160/160 mm, 25.08 kg

£3,670.31 Incl. Tax

~~£4,671.53~~ MSRP

-21%

Recommended supplier selling price in 2026

Color

Black

Size

Size charts

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Description
Product Details

Trek Rail+ 8 Dark Star: tough aluminium for rough terrain

The Trek Rail+ 8 is the aluminium Rail+ best equipped for enduro: Alpha Platinum frame, 160 mm RockShox ZEB Select fork, Super Deluxe Select RT shock and 160 mm at the rear. The Bosch Performance Line CX motor and 800 Wh PowerTube battery are the same as across the range; Trek quotes 25.08 kg in size M. Dark Star, a deep sparkling black, gives it a serious look.

Technical specifications

Frame	Alpha Platinum aluminium, removable RIB 2.0 battery, Motor Armor, adjustable head angle, Mino Link, adjustable suspension leverage, UDH, Boost148
Motor	Bosch Performance Line CX, 85 Nm (up to 100 Nm via the eBike Flow app), 250 W rated, assist up to 25 km/h
Battery	Integrated, removable Bosch PowerTube 800 Wh (RIB 2.0)
Controls / display	Bosch System Controller BRC3100, smart system
Suspension	RockShox ZEB Select Charger RC 160 mm / RockShox Super Deluxe Select RT 205 x 65 mm, 160 mm
Drivetrain	Shimano 1x12: XT M8100 derailleur, Deore M6100 10-51 cassette, SLX chain
Brakes	SRAM DB 8 4-piston hydraulic, CenterLine 200 mm rotors
Wheels / tyres	Bontrager Line Comp 30 / Brevard Pro XR 29 x 2.50 front, 27.5 x 2.60 rear (27.5 in S)
Cockpit	Bontrager Line alloy 35 mm handlebar, 780 mm, 27.5 mm rise, Elite 45 mm stem
Saddle / seatpost	Bontrager Verse P3 / Line Dropper 150 to 200 mm depending on size
Weight	25.08 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ RockShox ZEB 160 mm fork	✓ Bosch CX, PowerTube 800 Wh
✓ Alpha Platinum aluminium	✓ Shimano XT 12-speed derailleur
✓ SRAM DB 8 brakes, 200 mm rotors	✓ 25.08 kg in size M

Who is it for?

For the mountain biker who rides hard on rocky terrain and prefers an aluminium frame, less sensitive to repeated impacts, over a more expensive carbon one. It suits anyone who often transports their bike and doesn't want to worry about every knock.

The LVR workshop view

Alpha Platinum aluminium, built for full power. The Rail+ 8 keeps the aluminium frame of the Rail+ 5 but steps up a notch on the parts that take the hits: a ZEB fork with 38 mm stanchions, wider Line Comp 30 rims and Brevard Pro XR tyres. The welded Alpha Platinum alloy, protected by Motor Armor, handles the 85 Nm of the Bosch CX and the impacts of the terrain without flinching.

	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+ 8 is the aluminium Rail+ equipped for enduro, with the same RockShox suspension as the carbon Rail+ 9.7 XT; it weighs 1.35 kg more than the latter in M.

The ZEB Select and its 38 mm stanchions are sized for enduro: they keep the front wheel on line when the 25 kg bike arrives at speed in a rock garden. The Line Comp 30 rims and 2.60 inch Brevard Pro XR rear tyre support the tyre well at low pressure on the garrigue's rock slabs.

The Shimano XT derailleur runs a Deore 10-51 cassette: a mix that puts precision where it counts and keeps wear parts affordable. The assist cuts out at 25 km/h, as regulations require for a 250 W rated motor; on the forest tracks of the Caroux, it is enough to get you back up to the top of the descents quickly.

Which Rail+ should you choose?

Model	Motor / battery	Rear / front travel	Drivetrain	Weight (M)
Rail+ 5	Bosch CX / 800 Wh	160 / 160 mm	Shimano Deore 12-speed	24.78 kg
Rail+ 8	Bosch CX / 800 Wh	160 / 160 mm	Shimano XT / Deore 12-speed	25.08 kg
Rail+ 9.7 XT	Bosch CX / 800 Wh	160 / 160 mm	Shimano XT / SLX 12-speed	23.73 kg
Rail+ 9.8 XT Di2	Bosch CX / 800 Wh	160 / 160 mm	Wireless Shimano XT Di2	23.98 kg

Our take: this Rail+ 8 has the same RockShox suspension as the carbon Rail+ 9.7 XT (23.73 kg) but weighs 25.08 kg in M, or 1.35 kg more. Compared with the Rail+ 5 (24.78 kg), it gains a ZEB and SRAM DB 8 brakes.

LVR sizing advice

The dropper post grows with the frame: 150 mm in S, 170 mm in M, 200 mm above that. Size S rolls on two 27.5 inch wheels, easier to handle for a smaller rider; from M upwards, it runs a 29 front and 27.5 rear setup.

Size	S	M	XL
Rider height (cm)	155-165	165-177	188-195
Inseam (cm)	74-78	79-83	89-91
Dropper post (mm)	150	170	200
Front / rear wheels (in)	27.5 / 27.5	29 / 27.5	29 / 27.5

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

Your questions

Why choose aluminium?	Alpha Platinum handles knocks well and costs less, for 1.35 kg more than carbon.
Are the DB 8 brakes enough?	Yes, four pistons and 200 mm rotors; a regular bleed keeps them consistent.
Which sizes for this colourway?	S, M and XL, from 155 to 195 cm according to the Trek guide.
Is the black matt or gloss?	Dark Star is a deep black with fine sparkles, discreet from a distance.

The LVR Cycles verdict

A tough aluminium Rail+, with a ZEB and sturdy tyres for the roughest terrain. Its sparkling black gives it a sober, serious look.

Pros
+ 38 mm ZEB fork
+ Impact-resistant aluminium frame
+ Sturdy Brevard Pro XR tyres

Cons
- 25.08 kg, the heaviest Rail+
- Deore cassette a little heavy

Why buy from LVR Cycles? As a Trek retailer in Béziers, we service the ZEB fork and shock on your Rail+, update the Bosch motor and set up your tyres tubeless.

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-5329134

Data sheet