Trek Rail+ 8 Gen 5 (2026) - Dark Star

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Palmerston North 06 353 3373 | Paraparaumu 04 297 0007

AVAILABLE NOW!

Rise above. Rail beyond.

Huge boost. Massive adventures. The Rail+ is a burly e-MTB that has its heart set on epic rides that take you far, far beyond the beaten track. With plenty of front and rear travel, tons of torque and a massive 800 Wh battery, this beast is built to tackle big miles and even bigger terrain. Peak to peak adventures? Sounds like a blast.

  • MXWheel size
  • 160 mmRear suspension
  • 160 mmFront suspension
  • BoschMotor
  • 85-100 NmTorque
  • 800 WhBattery size

The Rail+ 8 is an aluminium enduro e-bike with big power and tons of travel for wild, ride-anything adventures. It starts with an Alpha Platinum Aluminium frame paired with a RockShox Super Deluxe+ shock and ZEB Select fork (160 mm front/rear) for making quick work of chunky backcountry rock gardens. You get the smooth-shifting performance of a Shimano XT/SLX drivetrain, stop-on-a-dime control from SRAM DB 8 4-piston disc brakes, a Bontrager Line dropper post and tubeless-ready Bontrager Line TLR 30 wheels.

New RIB 2.0

New RIB 2.0

Removable Integrated Battery (RIB 2.0) makes it easy to remove your battery for more convenient charging or travelling, and you don’t have to worry about dropping it thanks to a secondary safety catch.

Bosch Mini Remote

Bosch Mini Remote

The compact, ergonomic Mini Remote lets you easily change assist level, activate Walk mode, or turn on optional lights, all without moving your hand off the handlebar. Plus, it's wireless and connects with your System Controller via Bluetooth

Mixed wheel size

Mixed wheel size

You get a 29" front wheel for monster truckin' over stuff, with a smaller 27.5" wheel out back for getting rowdy.

Adjust the suss for full send

Adjust the suss for full send

Adjust the leverage rate with just a flip of a chip. Ride it in the Less progressive setting for a plusher feel perfect for rugged trails with square-edge bumps. Flip it to More progressive when you're hitting big features and don’t want to bottom-out, or when you want to run a coil shock.

Bosch Kiox 400C display

Bosch Kiox 400C display

The Bosch Kiox 400C integrates perfectly into the top tube of your bike and displays all the info you need. This display is compatiable with the Bosch eBike flow app and features a USB-C charging socket to turn your bike into a power bank.

Active Braking Pivot

Active Braking Pivot

Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

A better way to produce aluminium

A better way to produce aluminium

Starting in 2024, we began removing high-emission aluminium from our manufacturing and replacing it with low-emission aluminium made with renewable energy. By October 2025, nearly every alloy bike we make – this one included – had made the switch, driving a major drop in our footprint.

Bosch eBike Flow app

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalised experience. Use it to customise your motor's assist behaviour, track your ride stats and integrate your data with apps like Strava and Apple Health. There's even handy features like navigation and service reminders.

Shimano XT

Shimano XT

Shimano XT is the original mountain bike groupset and trusted by generations of mountain bikers around the world. Whatever the trail, wherever you ride, XT is your solution for mountain biking today. Reliable shifting. Superior braking. Intuitive maintenance. XT is the high performance workhorse you can count on.

*Please note – spec applies to all sizes unless listed separately

Frame
Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered head tube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34.9 mm seat tube, ABP, UDH, Boost148, 12 mm thru axle, 160 mm travel
Fork
RockShox ZEB Select, DebonAir spring, Charger RC damper, tapered steerer, 44 mm offset, Boost110, Maxle Stealth, 160 mm travel
Shock
RockShox Super Deluxe Select RT, 205mm x 65mm

*Wheel front
Wheel rear
Bontrager Line Comp 30, High Strength 6000 Series Aluminium rim, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano Micro Spline freehub, Boost148, 12 mm thru axle, 27.5"
Skewer rear
*Tyre
Size: S, M, L, XL
Bontrager Brevard Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 27.5x2.50"
Size: M, L, XL
Bontrager Brevard Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.50"
Tyre part
Bontrager TLR sealant, 180 ml/6 oz
Max tyre size
Frame: 27.5x2.60", Fork: See manufacturer

Battery
Bosch PowerTube 800 Wh, smart system
Charger
Bosch standard 4A, 230V, smart system
Controller
Bosch Kiox 400C, mini remote
Motor
Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)
E-bike Classification
Class 1

Shifter
Shimano SLX M7100, 12-speed
Rear derailleur
Shimano XT M8100, long cage
Crank arm
E*thirteen E*spec Plus, 160 mm length
Cassette
Shimano Deore M6100, 10-51, 12-speed
Chain
Shimano SLX M7100, 12-speed
Pedal
VP-536 nylon platform
Max. chainring size
1x: 36T

Saddle
Bontrager Verse P3, steel rails
*Seatpost
Handlebar
Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
Grips
Bontrager XR Trail Comp, nylon lock-on
Stem
Bontrager Elite, 35 mm, 0-degree, 45 mm length
Head set
Brake
SRAM DB 8 4-piston hydraulic disc
Brake rotor
SRAM CentreLine, 6-bolt, round-edge, 200 mm
Rotor size
Max brake rotor sizes – Frame: 220 mm, Fork: see fork manufacturer

Mudguard
Trek 27.5" custom fender

Weight
M – 25.08 kg/55.3 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).

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. The prices shown are the manufacturer's suggested retail prices.

Weights are based off pre-production products at time of publication. Weights may vary in final production.

How tall are you?

To measure your height, stand up straight, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inside leg?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inside leg measurement. Your inside leg is very important to your final bike size so please measure carefully.

Sizing

size-table
Size Rider Height Inseam
S

155 - 165 cm

5'1" - 5'5"

74 - 78 cm

29" - 31"

M

165 - 177 cm

5'5" - 5'10"

79 - 83 cm

31" - 33"

L

177 - 188 cm

5'10" - 6'2"

84 - 89 cm

33" - 35"

XL

188 - 195 cm

6'2" - 6'5"

89 - 91 cm

35" - 36"

Geometry

Labelled bike diagram showing geometry points A to N.
Geometry diagram labelling frame measurements A to N. Each label corresponds to a row in the geometry table below.

All measurements provided in cm unless otherwise stated.

Sizing table
Frame size number Frame size letter Geometry position Wheel size A — Seat tube B — Seat tube angle Effective seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
15.5" S High 27.5" 38.0 75.3° 77.9° 10.0 65.0° 56.2 34.4 1.2 44.6 4.3 11.9 120.1 76.7 43.5 59.8
15.5" S Low 27.5" 38.0 74.8° 77.4° 10.0 64.5° 56.3 33.8 1.8 44.8 4.3 12.2 127.8 76.2 43.0 59.4
17.5" M High 29"/27.5" 41.0 75.3° 77.7° 10.0 65.0° 59.1 34.5 1.8 44.6 4.3 12.7 122.9 78.4 45.5 63.1
17.5" M Low 29"/27.5" 41.0 74.8° 77.2° 10.0 64.5° 59.2 33.8 2.4 44.8 4.3 13.1 123.0 77.8 45.0 62.7
19.5" L High 29"/27.5" 43.5 75.2° 77.5° 12.0 65.0° 63.9 34.5 1.8 44.6 4.3 12.7 127.7 78.5 49.5 64.9
19.5" L Low 29"/27.5" 43.5 74.8° 77.0° 12.0 64.5° 63.9 33.8 2.4 44.8 4.3 13.1 127.8 77.9 49.0 64.5
21.5" XL High 29"/27.5" 47.0 75.2° 77.4° 14.5 64.9° 67.0 34.5 1.7 44.6 4.3 12.7 131.3 80.4 52.0 67.2

 

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