Top Fuel 8 fuses the speed of a cross country bike with the capability and forgiveness of a full suspension trail bike. Its quick, nimble, and dishes out serious fun on flow trails and techy descents alike.
- This bike’s killer suspension setup is both efficient and ready to party
- You get wide Bontrager Line Comp 30 wheels that boost grip and reduce flats with their tubeless setup
- Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
- A sleek internal storage compartment gives you a versatile spot to stow tools and gear
- New, removable Knock Block has a bigger steering angle to keep cables and hoses safe without sacrificing turning radius
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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Quick and in control
120mm of rear travel combined with progressive trail geometry gives you a fast, responsive ride that helps you keep your cool when the trail turns rowdy.
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Internal Storage
Internal frame storage makes it easy to ditch the pack and still carry your ride essentials.
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Hassle-free routing
Guided internal cable routing keeps Top Fuel quiet on the trail and maintenance a breeze.
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Will my bike have a curved top tube?
Smaller frames (XS and S) have a curved top tube. This design makes for a lower standover height, which allows shorter riders to straddle the bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically dont have the same issues with standover height.
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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 |
Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel |
Fork |
RockShox Pike, DebonAir spring, Rush RC 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, 29 / |
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, 29 |
Tire |
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40 |
Tire Part |
Bontrager TLR sealant, 6oz |
Rim Strip |
Bontrager TLR |
Shifter |
Shimano XT M8100, 12 speed |
Rear Derailleur |
Shimano XT M8100, long cage |
Crank |
Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length |
Bottom Bracket |
Shimano BB-MT501 BSA |
Cassette |
Shimano SLX M7100, 10-51T, 12 speed |
Chain |
Shimano SLX M7100, 12 speed |
Brake |
Shimano M6120 4-piston hydraulic disc // Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper |
Brake Rotor |
Shimano RT66, 6-bolt, 180mm |
Saddle |
Bontrager Arvada, steel rails, 138mm width |
Handlebar |
Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width |
Stem |
Bontrager Elite, 35mm, 0 degree, 45mm length |
Headset |
Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8 top, 1.5 bottom |
Grips |
Bontrager XR Trail Comp, nylon lock-on |
Geometry Chart
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
75.9° |
Eff Top Tube |
56.9 |
Frame Reach |
41.9 |
Frame Size Letter |
S |
Frame Size Number |
15.5" |
Frame Stack |
59.6 |
Head Angle |
65.9° |
Head Tube Length |
10 |
Offset |
4.3 |
Position |
High |
Seat Tube |
39.5 |
Seat Tube Angle |
69.9° |
Standover |
72.4 |
Trail |
12 |
Wheelbase |
115.3 |
Wheel Size |
29" |
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
75.9° |
Eff Top Tube |
59.9 |
Frame Reach |
44.9 |
Frame Size Letter |
M |
Frame Size Number |
17.5" |
Frame Stack |
59.6 |
Head Angle |
65.9° |
Head Tube Length |
10 |
Offset |
4.3 |
Position |
High |
Seat Tube |
42 |
Seat Tube Angle |
69.9° |
Standover |
74.4 |
Trail |
12 |
Wheelbase |
118.3 |
Wheel Size |
29" |
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
75.9° |
Eff Top Tube |
61.5 |
Frame Reach |
46.4 |
Frame Size Letter |
ML |
Frame Size Number |
18.5" |
Frame Stack |
60 |
Head Angle |
65.9° |
Head Tube Length |
10.5 |
Offset |
4.3 |
Position |
High |
Seat Tube |
43.5 |
Seat Tube Angle |
69.9° |
Standover |
74.9 |
Trail |
12 |
Wheelbase |
120 |
Wheel Size |
29" |
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
75.9° |
Eff Top Tube |
63.1 |
Frame Reach |
47.9 |
Frame Size Letter |
L |
Frame Size Number |
19.5" |
Frame Stack |
60.5 |
Head Angle |
65.9° |
Head Tube Length |
11 |
Offset |
4.3 |
Position |
High |
Seat Tube |
45 |
Seat Tube Angle |
69.9° |
Standover |
75.4 |
Trail |
12 |
Wheelbase |
121.7 |
Wheel Size |
29" |
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
75.9° |
Eff Top Tube |
65.4 |
Frame Reach |
49.9 |
Frame Size Letter |
XL |
Frame Size Number |
21.5" |
Frame Stack |
61.9 |
Head Angle |
65.9° |
Head Tube Length |
12.5 |
Offset |
4.3 |
Position |
High |
Seat Tube |
50 |
Seat Tube Angle |
69.9° |
Standover |
76.4 |
Trail |
12 |
Wheelbase |
124.4 |
Wheel Size |
29" |
B B Drop |
2.7 |
B B Height |
34.6 |
Chainstay Length |
43.4 |
Eff Seat Tube Angle |
69.9° |
Eff Top Tube |
67.7 |
Frame Reach |
51.9 |
Frame Size Letter |
XXL |
Frame Size Number |
23.0" |
Frame Stack |
63 |
Head Angle |
65.9° |
Head Tube Length |
13.5 |
Offset |
4.3 |
Position |
High |
Seat Tube |
54 |
Seat Tube Angle |
75.9° |
Standover |
76.4 |
Trail |
11.2 |
Wheelbase |
126.8 |
Wheel Size |
29" |