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2025 Top Fuel 9.8 GX AXS Gen 4 Full Suspension Mountain Bike

$6,199.93 $6,499.93
SKU: TRE384448284  |  Barcode: 197216022497
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  • Make Top Fuel yours

    Make Top Fuel yours

    Opt for light parts and a 120mm fork for a featherweight Top Fuel, or a 140mm fork and longer-stroke 130mm rear shock for extra versatility. Room for a longer dropper and MX wheels lets you customize Top Fuel into an ultimate playful trail whip.

  • 4-way Mino Link

    4-way Mino Link

    Easily adjust the suspension and geometry four different ways for where and how you ride. With the flip of a chip, you can ride with more or less progressive suspension, and tweak your geometry for a slacker head tube and lower BB or steeper head tube and higher BB.

  • New internal storage with new BITS bags

    New internal storage with new BITS bags

    New internal frame storage bags make it easy to ditch the pack and still carry your ride essentials.

  • 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.

Overview

Top Fuel 9.8 GX AXS Gen 4 is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. It gives you the confidence you want through roots and rocks, thanks to a 120mm/130mm RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you can shift easy even under load with a SRAM GX Eagle AXS wireless transmission.

Technical Specifications

Frame OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel
Fork RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
Shock RockShox Deluxe Ultimate RCT, 185mm x 50mm
*wheel front Size: S Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5''Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
*wheel rear Size: S Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5''Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''
Skewer rear Bontrager Switch thru axle, removable lever
*tire Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40''Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
Tire part Bontrager TLR sealant, 6oz
Rim strip Bontrager TLR
Max tire size Frame: 29x2.50\, Fork: See manufacturer
Battery SRAM AXS battery pack (with charger)
Shifter SRAM AXS POD
Rear derailleur SRAM GX Eagle AXS, T-Type
Crank SRAM GX Eagle, T-Type, DUB, 30T, 55mm chainline, 170mm length
Bottom bracket SRAM DUB MTB Wide, 73mm, BSA threaded
Cassette SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
Chain SRAM GX Eagle, T-Type, 12 speed
Max chainring size 1x: 34T, min 30T
Saddle Verse Short Comp, steel rails, 145mm width
*seatpost Size: S Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm lengthSize: M, ML, L, XL Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length
*handlebar/stem (integrated) Size: S Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm stem lengthSize: M, ML, L, XL Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 45mm stem length
Grips Bontrager XR Trail Elite, nylon lock-on
Brake SRAM Level Bronze 4-piston hydraulic disc
Brake rotor SRAM CenterLine, 6-bolt, round edge, 180mm
Rotor size Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer
Weight M - 13.20 kg / 29.11 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

Parts are subject to change without notice. Chat with us if you have any questions.

Geometry

Bike geometry diagram

All measurements provided in cm unless otherwise noted.

Frame size letter SSMMMLMLLLXLXL
Geometry position HighLowHighLowHighLowHighLowHighLow
Wheel size 27.5"27.5"29"29"29"29"29"29"29"29"
A — Seat tube 36.036.041.041.042.042.043.543.547.047.0
B — Seat tube angle (degrees)69.5°69.0°70.5°70.0°70.5°70.0°70.5°70.0°70.5°70.0°
Effective seat tube angle (degrees)76.5°76.0°77.3°76.9°76.6°76.2°76.3°75.9°75.6°75.2°
C — Head tube length 10.510.510.510.511.011.011.511.513.513.5
D — Head angle (degrees)65.9°65.5°65.9°65.5°65.9°65.5°65.9°65.5°65.9°65.5°
E — Effective top tube 55.855.958.758.861.161.263.063.167.267.3
F — Bottom bracket height 35.134.535.434.835.434.835.434.835.434.8
G — Bottom bracket drop 1.01.62.63.22.63.22.63.22.63.2
H — Chainstay length 43.443.543.443.543.944.043.944.044.444.5
I — Offset 4.34.34.34.34.34.34.34.34.34.3
J — Trail 11.111.512.112.512.112.512.112.512.112.5
K — Wheelbase 115.0115.1118.8118.8121.0121.0122.7122.7127.0127.1
L — Standover 70.570.075.575.075.775.275.875.376.375.8
M — Frame reach 42.241.745.244.746.746.248.247.751.250.7
N — Frame stack 56.657.059.960.360.460.760.861.262.663.0

This Geometry Chart is provided by the Manufactuer. Chat with us if you have any questions.

Sizing

sizeinchescm
S5'1" - 5'5"155 - 165
M5'5" - 5'10"165 - 177
ML5'8" - 5'11"173 - 180
L5'10" - 6'2"177 - 188
XL6'2" - 6'5"188 - 195

Sizing to be used as a reference only. Chat with us if you have any questions.

Top Fuel 9.8 GX AXS Gen 4
Trek

2025 Top Fuel 9.8 GX AXS Gen 4 Full Suspension Mountain Bike

From $5,499.62 $6,499.93
Top Fuel 9.8 GX AXS Gen 4 is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. It gives you the confidence you want through roots and rocks, thanks to a 120mm/130mm RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you can shift easy even under load with a SRAM GX Eagle AXS wireless transmission.

Color

Size

  • S (27.5" wheel)
  • M
  • ML
  • L
  • XL
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