Trek Rail+ 8 Gen 5

Name: Trek Rail+ 8 Gen 5
Brand: Trek

2025 MountainEnduro Electric bicycle Manufacturer page

Last known price: $6,999

Prices shown first for United States
Travel: 160 / 160 mm Fork / rear shock
Wheels: 27.5″, 29″ / 27.5″
Drivetrain: 1 × 12 10–51t
Gear range: 510%
Battery: 800 Wh
Weight: 25.08 kg 55.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

15.5" 153–167
15.5" 153–167
17.5" 170–184
17.5" 170–184
19.5" 176–189
19.5" 176–189
21.5" 186–196
21.5" 186–196

Components

22 of 24 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Alpha Platinum Aluminum, Removable Integrated Battery (RIB 2.0), tapered head tube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34.9mm seat tube, ABP, UDH, Boost148, 12 mm thru axle, 160 mm travel Not identified

Electric system

3 parts

Suspension

3 parts

Drivetrain

5 parts

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset

Integrated cartridge bearing, 1-1/8" top, 1.5" bottom, angle adjust cup compatible Not identified
Pedals
- VP
VP-536
Saddle
- Bontrager
Seatpost
- Bontrager
Stem
- Bontrager

Other components

1 part

Fenders
- Trek

Sizes and geometry

8 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 15.5"

Table

Reach 435mm

Stack 598mm

Wheelbase 1201mm

Head angle 65.0°

Seat angle 77.9°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 8 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	435	430	455	450	495	490	520	515
Stackmm	598	594	631	627	649	645	672	667
Top tube lengthmm	562	563	591	592	639	639	670	670
Seat tube lengthmm	380	380	410	410	435	435	470	470
Head tube lengthmm	100	100	100	100	120	120	145	145
Head tube angle	65°	64.5°	65°	64.5°	65°	64.5°	64.9°	64.5°
Seat tube angle	77.9°	77.4°	77.7°	77.2°	77.5°	77°	77.4°	76.9°
Chainstay lengthmm	446	448	446	448	446	448	446	448
Wheelbasemm	1201	1278	1229	1230	1277	1278	1313	1314
Front centermm	755	831	784	783	832	831	867	867
Bottom bracket dropmm	12	18	18	24	18	24	17	24
Bottom bracket heightmm	343	337	—	—	—	—	—	—
Standover heightmm	767	762	784	778	785	779	804	798
Fork rakemm	43	43	39	41	38	40	37	41
Trailmm	119	122	127	131	127	131	127	131
Stack/reach ratio	1.38	1.38	1.39	1.39	1.31	1.32	1.29	1.30

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 25.08 kg

55.3 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 160 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51

Wheels and brakes

Wheel configuration: Different sizes
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Mechanical

Electric system

Battery capacity: 800 Wh

Additional specifications

Battery: Bosch PowerTube 800Wh, smart system
Fork spring: Air
Tire clearance: Maximum tire width: 2.6″
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2025
Sample: 1,419 bicycles with this information
Coverage: 97.5% of the class

Rear travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2025
Sample: 1,106 bicycles with this information
Coverage: 76.0% of the class

Shifting

Mechanical

477 of 1,455 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2025
Sample: 1,455 bicycles with this information
Coverage: 100.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds

Differences across 2025 builds
Specification	This bicycle Trek Rail+ 8 Gen 5	Trek Rail+ 5 Gen 5	Trek Rail+ 9.7 Gen 5	Trek Rail+ 9.8 Gen 5 GX AXS T-Type	Trek Rail+ 9.8 Gen 5 XT	Trek Rail+ 9.9 Gen 5 X0 AXS T-Type
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Carbon
Bicycle weight	25.08 kg	25.28 kg	23.73 kg	24.18 kg	23.78 kg	23.98 kg
Drivetrain
Largest sprocket	51	51	51	52	51	52
Wheels
Wheel configuration	Different sizes	Same size	Same size	Same size	Different sizes	Same size
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Mechanical	Electronic
Other specifications
Battery	Capacity: 800 WhBosch PowerTube 800Wh, smart system	Capacity: 800 WhBosch PowerTube 800Wh, smart system	Capacity: 800 WhBosch PowerTube 800Wh, smart system	Capacity: 800 WhBosch PowerTube 800Wh, smart system	Capacity: 800 WhBosch PowerTube 800 Wh, smart system	Capacity: 800 WhBosch PowerTube 800Wh, smart system
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum	Carbon
Wheel size	27.5″ / 29″	27.5″	27.5″	27.5″	29″ / 27.5″	27.5″