Browse product groups:

2025 Trek Top Fuel 9.9 XX AXS Gen 4 Bike

99 xx dark 01.png?VersionId=1MHnipAJNHC.kR4EoYuxWe7Pul
99 xx dark 01
99 xx dark 02.png?VersionId=rXm51zeZH
99 xx lunar 01.png?VersionId=kRo672kE
99 xx lunar 02
99 xx axinite 01
99 xx axinite 02
99 xx detail 01
99 xx detail 02
mino.png?VersionId=vK0ND 1
storage
bits
99 xx dark 01.png?VersionId=1MHnipAJNHC.kR4EoYuxWe7Pul 99 xx dark 02 99 xx lunar 01.png?VersionId=zWGLTmuWYzZmO4q9Fk B8x3XEp 99 xx lunar 02 99 xx axinite 01.png?VersionId=dSZhFJet TYKicjFDz 99 xx axinite 02 99 xx detail 01 99 xx detail 02 mino storage.png?VersionId=VOePWkTHgyam.5xew2QWMlAhZBeq bits
Related:
Trek
Where To Buy
Free standard shipping on all bikes (continental U.S. only).
Flat rate shipping to Hawaii and Alaska.
Free standard shipping on all bikes (continental U.S. only).
Flat rate shipping to Hawaii and Alaska.
$9,749.99
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.

Specifications

Product
Trek Top Fuel 9.9 XX AXS Gen 4 Bike
Model Year
2025
Riding Type
Cross Country
Trail
Rider
Unisex
Sizes and Geometry
SM (High, Low)
MD (High, Low)
ML (High, Low)
LG (High, Low)
XL (High, Low)
Wheel Size
27.5" (650b)
29"
Frame Material
Carbon Fiber
Frame Material Details
OCLV Mountain Carbon front and rear triangles, OCLV Next rocker link, molded chainstay protection, bolt-on dual-density down tube guard
Rear Travel
120mm
Rear Shock
RockShox Deluxe Ultimate RCT, 185mm length x 50mm stroke
Fork
RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 35mm stanchions, 44mm offset, Maxle Stealth thru-axle
Fork Travel
130mm
Head Tube Diameter
Tapered, 1.125" top, 1.5" bottom
Headset
 
Handlebar
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 820mm width, 27.5mm rise
Stem
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 0° rise
Virtual length: 35mm (SM), 45mm (MD-XL)
Grips
Bontrager
Brakes
SRAM Level Ultimate, 4-piston, SRAM HS2 180mm 6-bolt rotors
Brake Levers
SRAM Level Ultimate Stealth, carbon blade, tool-free reach adjust
Drivetrain
1x
Shifters
SRAM Eagle Pod Ultimate Controller, 12-speed, AXS electronic wireless
Front Derailleur
None
Rear Derailleur
SRAM XX SL Eagle Transmission, 12-speed, AXS electronic wireless
ISCG Tabs
ISCG05 front two bolts
Chainguide
None
Cranks
SRAM XX Eagle Transmission Carbon DUB, 170mm length
Chainrings
SRAM XX Eagle Transmission, 30 tooth, with bolt-on bashguards
Bottom Bracket
SRAM DUB MTB Wide, 73mm English/BSA threaded
Pedals
None
Chain
SRAM XX Eagle Transmission Flattop, 12-speed
Cassette
SRAM XX SL Eagle Transmission XS-1299, 12-speed, 10-52 tooth
Rims
Bontrager Line Pro 30, OCLV Mountain Carbon, tubeless ready
Hubs
Bontrager Line Pro wheelset, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with Rapid Drive 108 freehub and XD driver
Spokes
Bontrager Line Pro wheelset
Tires
SM: Bontrager Gunnison RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 27.5" x 2.4"
MD-XL Front: Bontrager Gunnison RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 29" x 2.4"
MD-XL Rear: Bontrager Montrose RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 29" x 2.4"
Saddle
Bontrager Verse Short Pro, carbon rails, 145mm width
Seatpost
RockShox Reverb AXS dropper, electronic wireless, SRAM AXS Pod Ultimate Controller
Drop: 100mm (SM), 170mm (MD-XL)
Seatpost Diameter
34.9mm
Seatpost Clamp
Single bolt
Rear Dropout / Hub Dimensions
12mm x 148mm (Boost)
Max. Tire Size
2.5"
Bottle Cage Mounts
One inside front triangle
Colors
Matte Dark Web, Lunar Silver, Axinite Flip
Warranty
Lifetime frame and rims; 2 years Trek/Bontrager parts, suspension linkage components, and paint/decals
Weight
 
Miscellaneous
• ABP (Active Braking Pivot) rear suspension design
• SM has 27.5" wheels; MD-XL have 29" wheels
• Geometry (High/Low) and rear suspension leverage rate (More/Less progressive) adjustable via Mino Link 4 flip chip in lower shock mount
• All sizes compatible with mixed ("Mullet") setups (29" front, 27.5" rear) by using 140mm travel fork and Mino Link 4 flip chip in High position
• Internal frame storage compartment in down tube; includes Bontrager BITS storage bag
• Guided internal cable routing
• SRAM UDH (Universal Derailleur Hanger)
• Convertible to 130mm rear travel with longer-stroke shocks
• Frame weight, size MD: 5.5 lb (2500 g)
• Includes Bontrager BITS integrated steerer-tube multi-tool
• Includes Bontrager TLR tubeless rim strips, sealant, and valves
• Includes SRAM AXS PowerPack battery charger
Price
$10,499.99
More Info

Trek website

Review This Product
What do you think?
Where To Buy
Free standard shipping on all bikes (continental U.S. only).
Flat rate shipping to Hawaii and Alaska.
Free standard shipping on all bikes (continental U.S. only).
Flat rate shipping to Hawaii and Alaska.
$9,749.99
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Bikes