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MountainE-bikePartial spec

2025 Trek Rail+ 9.8 GX AXS T-Type Gen 5

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Overview

Brand
Trek
Model family
Rail
Model year
2025
Category
Mountain · enduro
Frame material
carbon
Sizes
S, M, L, XL
Wheel size
27.5/29/27.5
Wheel setup
by frame size

Drivetrain

Speeds
12
Groupset
SRAM GX Eagle AXS
Electronic
true

Build

Fork
Fox Performance Elite Float 38, Float EVOL air spring, GRIP X damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt-X axle, 160mm travel
Stem
Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 45mm length
Tires
Bontrager Brevard RSL SE, Tubeless Ready, triple compound, aramid bead, 60 tpi, 27.5x2.50'' (S, M, L, XL); Bontrager Brevard RSL SE, Tubeless Ready, triple compound, aramid bead, 60 tpi, 29x2.50'' (M, L, XL)
Brakes
SRAM Maven Bronze 4-piston hydraulic disc
Saddle
Verse Short Comp, steel rails, 145mm width
Wheels
Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'' (S); Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' (M, L, XL)
Cassette
SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
Crankset
SRAM GX, 160mm length
Seatpost
Bontrager Line Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 410mm length (S); Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length (M, L, XL); Bontrager Line Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 515mm length (L, XL)
Shifters
SRAM AXS POD
Handlebar
Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
Weight kg
24.18
Rear shock
Fox Performance Elite Float X, 2-position damper, 205mm x 65mm
Rear derailleur
SRAM GX Eagle AXS, T-Type
Travel front mm
160

Motor and battery

Motor
Bosch Performance Line CX
Assist mph
20
Battery wh
800

Geometry

15.5
Reach mm: 435; Stack mm: 594; Chainstay mm: 446; Wheelbase mm: 1201; Head angle deg: 65; Seat angle deg: 77.9
17.5
Reach mm: 455; Stack mm: 627; Chainstay mm: 446; Wheelbase mm: 1229; Head angle deg: 65; Seat angle deg: 77.7
19.5
Reach mm: 495; Stack mm: 645; Chainstay mm: 446; Wheelbase mm: 1277; Head angle deg: 65; Seat angle deg: 77.5
21.5
Reach mm: 520; Stack mm: 668; Chainstay mm: 446; Wheelbase mm: 1313; Head angle deg: 64.9; Seat angle deg: 77.4

Sold across model years 2025-2026 under one product code.

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