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2025 Top Fuel 9.9 X0 AXS Gen 4 Full Suspension Mountain Bike

$7,499.93 $7,899.93
SKU: TRE383752234  |  Barcode: 197216000044
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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.

  • BITS: Your trailside savior

    BITS: Your trailside savior

    Cleverly integrated into the steerer tube, the included BITS multi-tool has everything you need for trailside adjustments and repairs.

  • 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 9.9 X0 AXS Gen 4 is an ultra-light and capable carbon trail bike that's built for soaring up climbs and rallying over miles of singletrack. This top-level build delivers the performance you want, with a RockShox Ultimate suspension package (120mm/130mm), and SRAM's wireless X0 AXS transmission that shifts smooth and easy, especially under load. It's topped off with carbon wheels to keep your ride light from top to bottom.

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 Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 44mm offset, Boost110, Maxle Stealth, 130mm travel
Shock RockShox Deluxe Ultimate RCT, 185mm x 50mm
*wheel front Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5''Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
*wheel rear Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 27.5''Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, 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
Max tire size Frame: 29x2.50\, Fork: See manufacturer
Battery SRAM AXS battery pack (with charger)
*shifter Size: S , M, ML, L, XL SRAM AXS PODSize: S , M, ML, L, XL SRAM AXS POD, paired with dropper
Rear derailleur SRAM X0 Eagle AXS, T-Type
Crank SRAM X0 Eagle, DUB, 30T steel, T-Type, 55mm chainline, 170mm length
Bottom bracket SRAM DUB MTB Wide, 73mm, BSA threaded
Cassette SRAM Eagle XS-1295, T-Type, 10-52, 12 speed
Chain SRAM X0 Eagle, T-Type, 12 speed
Max chainring size 1x: 34T, min 30T
Saddle Verse Short Pro, carbon rails, 145mm width
*seatpost Size: S RockShox Reverb AXS, 100mm travel, wireless, 34.9mm, 340mm lengthSize: M, ML, L, XL RockShox Reverb AXS, 170mm travel, wireless, 34.9mm, 480mm 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
*brake Size: S , M, ML, L, XL SRAM Level Silver 4-piston hydraulic discSize: S , M, ML, L, XL SRAM Level Silver Stealth 4-piston hydraulic disc
Brake rotor SRAM HS2, 6-bolt, 180mm
Rotor size Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer
Weight M - 13.10 kg / 28.89 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 9.9 X0 AXS Gen 4
Trek

2025 Top Fuel 9.9 X0 AXS Gen 4 Full Suspension Mountain Bike

$7,499.93 $7,899.93
Top Fuel 9.9 X0 AXS Gen 4 is an ultra-light and capable carbon trail bike that's built for soaring up climbs and rallying over miles of singletrack. This top-level build delivers the performance you want, with a RockShox Ultimate suspension package (120mm/130mm), and SRAM's wireless X0 AXS transmission that shifts smooth and easy, especially under load. It's topped off with carbon wheels to keep your ride light from top to bottom.

Color

Size

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