Trek Rail 9.8 Gen 4 GX AXS

Name: Trek Rail 9.8 Gen 4 GX AXS
Brand: Trek

2023 MountainEnduro Electric bicycle Manufacturer page

Last known price: $10,299

Prices shown first for United States
Travel: 160 / 150 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–52t
Gear range: 520%
Battery: 625 Wh
Weight: 23.9 kg 52.7 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

15.5" 155–166
15.5" 164–178
17.5" 175–189
17.5" 187–195
19.5" 176–189
19.5" 176–189
21.5" 186–196
21.5" 186–196

Components

22 of 23 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

OCLV Mountain Carbon main frame, 1.8'' lower head tube, Bosch System Controller compatible, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9mm seat tube, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel Not identified

Electric system

3 parts

Suspension

3 parts

Drivetrain

6 parts

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

8 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 17.5"

Table

Reach 452mm

Stack 633mm

Wheelbase 1236mm

Head angle 64.2°

Seat angle 76.7°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ 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	436	432	456	452	491	487	521	517
Stackmm	625	628	629	633	643	646	656	660
Top tube lengthmm	579	580	600	601	638	639	671	673
Seat tube lengthmm	410	410	420	420	450	450	500	500
Head tube lengthmm	105	105	110	110	125	125	140	140
Head tube angle	64.6°	64.2°	64.6°	64.2°	64.6°	64.2°	64.6°	64.2°
Seat tube angle	77.1°	76.7°	77.1°	76.7°	77.1°	76.7°	77.1°	76.7°
Chainstay lengthmm	447	448	447	448	447	448	447	448
Wheelbasemm	1213	1214	1236	1236	1277	1278	1313	1314
Front centermm	767	768	790	790	831	832	867	868
Bottom bracket dropmm	27	33	27	33	27	33	27	33
Bottom bracket heightmm	346	341	346	341	346	341	346	341
Standover heightmm	761	756	773	768	770	765	768	763
Fork rakemm	42	43	43	42	43	43	43	42
Trailmm	130	133	130	133	130	133	130	133
Stack/reach ratio	1.43	1.45	1.38	1.40	1.31	1.33	1.26	1.28

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: Carbon
Bicycle weight: 23.9 kg

52.7 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm
Rear travel: 150 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 19.0 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Electronic

Electric system

Battery capacity: 625 Wh

Additional specifications

Battery: Size: S, Bosch PowerTube 625Wh, smart system; Size: M, L, XL, Bosch PowerTube 750Wh, smart system
Bottom bracket standard: Bosch
Fork spring: Air
Tire clearance: Maximum tire width: 2.6″
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

5 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: 2023
Sample: 1,823 bicycles with this information
Coverage: 98.4% of the class

Rear travel

150 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,564 bicycles with this information
Coverage: 84.4% of the class

Lowest gear

19.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,310 bicycles with this information
Coverage: 70.7% of the class

Highest gear

98.6 gear inches

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,310 bicycles with this information
Coverage: 70.7% of the class

Shifting

Electronic

364 of 1,851 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2023
Sample: 1,851 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.3 km/h
Highest gear: 37.8 km/h

Total gear range 520%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 19.0–98.6 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2023
Lowest gear: 1310 bicycles with this information, 70.7% of the class
Highest gear: 1310 bicycles with this information, 70.7% 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 2023 builds

Differences across 2023 builds
Specification	This bicycle Trek Rail 9.8 Gen 4 GX AXS	Trek Rail 5 500 W Gen 2	Trek Rail 5 625 W Gen 2	Trek Rail 5 625W Gen 3	Trek Rail 5 Gen 3 Deore	Trek Rail 5 Gen 2
Frame
Intended fit	Unisex	womens	womens	Unisex	Unisex	Unisex
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Bicycle weight	23.9 kg	23.88 kg	23.88 kg	24.88 kg	24.29 kg	23.88 kg
Drivetrain
Smallest sprocket	10	11	11	11	10	10
Largest sprocket	52	51	51	51	51	51
Lowest gear	19.0 in	19.3 in	19.3 in	19.3 in	19.3 in	19.3 in
Highest gear	98.6 in	89.6 in	89.6 in	89.6 in	98.6 in	98.6 in
Cockpit
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Electric bicycle systems
Battery capacity	625 Wh	500 Wh	625 Wh	625 Wh	500 Wh	500 Wh
Other specifications
Bottom bracket standard	Bosch	Not informed	Not informed	Not informed	Not informed	Not informed
Tire width	2.5″	2.6″	2.6″	2.6″	2.6″	2.6″