Top Fuel 9.9 X0 AXS Gen 4 is an ultra-light and capable carbon trail bike thats 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 SRAMs wireless X0 AXS transmission that shifts smooth and easy, especially under load. Its topped off with carbon wheels to keep your ride light from top to bottom.
- Top Fuel Gen 4 delivers with an intensely lightweight build, improved in-frame storage, and more adjustability for all kinds of rides and riders
- With 120mm rear and 130mm front RockShox Ultimate suspension, it delivers a well-balanced ride that stays efficient on the ups and playful on descents
- The 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride
- In-frame storage with an improved BITS bag system makes it easy to stash tools, tubes, and snacks
- Its more upgrade-ready than ever, with room for bigger 140mm forks and longer-stroke shocks for up to 130mm of rear travel, plus room for extra-long dropper posts
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
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 frame storage bags make it easy to ditch the pack and still carry your ride essentials.
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 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.
| 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 |
Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5 / |
| Wheel Rear |
Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 27.5 |
| Tire |
Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5×2.40 |
| Tire Part |
Bontrager TLR sealant, 6oz |
| Skewer Rear |
Bontrager Switch thru axle, removable lever |
| Shifter |
SRAM AXS POD // 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 |
| Brake |
SRAM Level Silver 4-piston hydraulic disc // SRAM Level Silver Stealth 4-piston hydraulic disc |
| Brake Rotor |
SRAM HS2, 6-bolt, 180mm |
| Saddle |
Verse Short Pro, carbon rails, 145mm width |
| Seatpost |
RockShox Reverb AXS, 100mm travel, wireless, 34.9mm, 340mm length |
| Handlebar |
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm stem length |
| Battery |
SRAM eTap battery pack (with charger) |
Geometry Chart
| B B Drop |
1 |
| Chainstay Length |
43.4 |
| Eff Seat Tube Angle |
76.5 |
| Eff Top Tube |
55.8 |
| Frame Reach |
42.2 |
| Frame Size Letter |
S |
| Frame Stack |
56.6 |
| Head Angle |
65.9 |
| Head Tube Length |
10.5 |
| Offset |
4.3 |
| Position |
High |
| Seat Tube |
36 |
| Seat Tube Angle |
69.5 |
| Standover |
70.5 |
| Trail |
11.1 |
| Wheelbase |
115 |
| Wheel Size |
27.5″ |
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