Top Fuel 9.8 XT 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 get clean shifts from a 12-speed Shimano XT drivetrain.
- 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 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.
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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.
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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.
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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.
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Shimano XT
Shimano XT is the original mountain bike groupset and trusted by generations of mountain bikers around the world. Whatever the trail, wherever you ride, XT is your solution for mountain biking today. Reliable shifting. Superior braking. Intuitive maintenance. XT is the high performance workhorse you can count on.
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| 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 |
Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5 / |
| Wheel Rear |
Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 27.5 |
| Tire |
Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40 |
| Skewer Rear |
Bontrager Switch thru axle, removable lever |
| Shifter |
Shimano XT M8100, 12 speed |
| Rear Derailleur |
Shimano XT M8100, long cage |
| Crank |
Shimano XT M8120, 30T, 55mm chainline, 170mm length |
| Bottom Bracket |
Shimano BB-MT501 BSA |
| Cassette |
Shimano XT M8100, 10-51, 12 speed |
| Chain |
Shimano Ultegra/XT M8100, 12 speed |
| Brake |
Shimano XT M8120 4-piston hydraulic disc // Shimano XT M8120 4-piston hydraulic disc |
| Brake Rotor |
Shimano RT86, 6-bolt, 180mm |
| Saddle |
Verse Short Comp, steel rails, 145mm width |
| Seatpost |
Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length |
| Handlebar |
Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm stem length |
| Grips |
Bontrager XR Trail Elite, nylon lock-on |
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" |
| B B Drop |
2.6 |
| Chainstay Length |
43.4 |
| Eff Seat Tube Angle |
77.3° |
| Eff Top Tube |
58.7 |
| Frame Reach |
45.2 |
| Frame Size Letter |
M |
| Frame Stack |
59.9 |
| Head Angle |
65.9° |
| Head Tube Length |
10.5 |
| Offset |
4.3 |
| Position |
High |
| Seat Tube |
41 |
| Seat Tube Angle |
70.5° |
| Standover |
75.5 |
| Trail |
12.1 |
| Wheelbase |
118.8 |
| Wheel Size |
29" |
| B B Drop |
2.6 |
| Chainstay Length |
43.9 |
| Eff Seat Tube Angle |
76.6° |
| Eff Top Tube |
61.1 |
| Frame Reach |
46.7 |
| Frame Size Letter |
ML |
| Frame Stack |
60.4 |
| Head Angle |
65.9° |
| Head Tube Length |
11 |
| Offset |
4.3 |
| Position |
High |
| Seat Tube |
42 |
| Seat Tube Angle |
70.5° |
| Standover |
75.7 |
| Trail |
12.1 |
| Wheelbase |
121 |
| Wheel Size |
29" |
| B B Drop |
2.6 |
| Chainstay Length |
43.9 |
| Eff Seat Tube Angle |
76.3° |
| Eff Top Tube |
63 |
| Frame Reach |
48.2 |
| Frame Size Letter |
L |
| Frame Stack |
60.8 |
| Head Angle |
65.9° |
| Head Tube Length |
11.5 |
| Offset |
4.3 |
| Position |
High |
| Seat Tube |
43.5 |
| Seat Tube Angle |
70.5° |
| Standover |
75.8 |
| Trail |
12.1 |
| Wheelbase |
122.7 |
| Wheel Size |
29" |
| B B Drop |
2.6 |
| Chainstay Length |
44.4 |
| Eff Seat Tube Angle |
75.6° |
| Eff Top Tube |
67.2 |
| Frame Reach |
51.2 |
| Frame Size Letter |
XL |
| Frame Stack |
62.6 |
| Head Angle |
65.9° |
| Head Tube Length |
13.5 |
| Offset |
4.3 |
| Position |
High |
| Seat Tube |
47 |
| Seat Tube Angle |
70.5° |
| Standover |
76.3 |
| Trail |
12.1 |
| Wheelbase |
127 |
| Wheel Size |
29" |
