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Full Suspension MTB
Trek Top Fuel 8 XT
$3,999.99
SKU5275064
Top Fuel 8 fuses the speed of a cross country bike with the capability and forgiveness of a full suspension trail bike. It's quick, nimble, and dishes out serious fun on flow trails and techy descents alike.
OVERVIEW
It's right for you if...
You’re looking for a do-it-all full suspension mountain bike that is efficient yet can get rowdy. You want to rip rough descents, fly up climbs, and crush lap after lap.
The tech you get
A lightweight aluminum frame with internal storage, 130mm RockShox Pike fork with plush DebonAir spring, 120mm of rear travel with a RockShox Deluxe Ultimate RCT shock, and a Shimano XT drivetrain. Plus, 4-piston brakes for confident descents, Bontrager Line Comp 30 wheels that are already completely tubeless ready, including sealant, and a Bontrager Line Dropper.
The final word
Top Fuel 8 gets you the value of an alloy frame with drivetrain, fork, and brake upgrades that keep up as you progress in speed and skill.
SPECS
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*Please note - spec applies to all sizes unless listed separately
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| Frameset | |
| 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
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| Fork |
RockShox Pike, DebonAir spring, Rush RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
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| Shock |
RockShox Deluxe Ultimate RCT, 185mm x 50mm
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| Max compatible fork travel |
130mm (541mm axle-to-crown)
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| Wheels | |
| Wheel front |
Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
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| Wheel rear |
Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''
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| Tire |
Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40''
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| Tire part |
Bontrager TLR sealant, 6oz
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| Rim strip | Bontrager TLR |
| Max tire size |
Frame: 29x2.50", Fork: See manufacturer
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| Drivetrain | |
| Shifter |
Shimano XT M8100, 12 speed
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| Rear derailleur |
Shimano XT M8100, long cage
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*Crank
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Size: S, M, M/L, L
Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length |
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Size: XL, XXL
Shimano Deore M6120, 30T ring, 55mm chainline, 175mm length |
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| Bottom bracket |
Shimano BB-MT501 BSA
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| Cassette |
Shimano SLX M7100, 10-51T, 12 speed
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| Chain |
Shimano SLX M7100, 12 speed
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| Max chainring size |
1x: 36T round, 34T oval, min 28T
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| Components | |
| Saddle |
Bontrager Arvada, steel rails, 138mm width
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*Seatpost
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Size: S
TranzX JD-YSP39, 100mm travel, internal routing, 34.9mm |
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Size: M, M/L
TranzX JD-YSP39, 150mm travel, internal routing, 34.9mm |
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Size: L, XL
TranzX JD-YSP39, 170mm travel, internal routing, 34.9mm |
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*Handlebar
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Size: S
Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width |
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Size: M, M/L, L, XL, XXL
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width |
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| Grips |
Bontrager XR Trail Comp, nylon lock-on
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| Stem |
Bontrager Elite, 35mm, 0 degree, 45mm length
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| Headset |
Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
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*Brake
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Size: S, M, M/L, L, XL, XXL
Shimano M6120 4-piston hydraulic disc |
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Size: S, M, M/L, L, XL, XXL
Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper |
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*Brake rotor
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Size: S, M, M/L, L, XL, XXL
Shimano RT66, 6-bolt, 180mm |
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Size: S, M, M/L, L, XL
Shimano RT66, 6-bolt, 160mm |
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| Rotor size |
Max brake rotor sizes - Frame: 180mm, Fork: see fork manufacturer
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| Weight | |
| Weight |
M - 14.85 kg / 32.74 lbs (with TLR sealant, no tubes)
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| Weight limit |
This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
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We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Prices shown are manufacturer's suggested retail prices.
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Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
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SIZING GUIDE AND GEOMETRY
| Size | Rider Height | Inseam |
|---|---|---|
| S |
155 - 165 cm 5'1" - 5'5" |
74 - 78 cm 29" - 31" |
| M |
165 - 176 cm 5'5" - 5'9" |
79 - 83 cm 31" - 33" |
| M/L |
173 - 180 cm 5'8" - 5'11" |
81 - 86 cm 32" - 34" |
| L |
177 - 188 cm 5'10" - 6'2" |
84 - 89 cm 33" - 35" |
| XL |
188 - 195 cm 6'2" - 6'5" |
89 - 91 cm 35" - 36" |
| 2XL |
195 - 203 cm 6'5" - 6'8" |
91 - 97 cm 36" - 38" |
All measurements provided in cm unless otherwise noted.
| Frame size number | 15.5" | 15.5" | 17.5" | 17.5" | 18.5" | 18.5" | 19.5" | 19.5" | 21.5" | 21.5" | 23.0" | 23.0" |
| Frame size letter | S | S | M | M | ML | ML | L | L | XL | XL | XXL | XXL |
| Geometry position | High | Low | High | Low | High | Low | High | Low | High | Low | High | Low |
| Wheel size | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
| A — Seat tube | 39.5 | 39.5 | 42 | 42 | 43.5 | 43.5 | 45 | 45 | 50 | 50 | 54 | 54 |
| B — Seat tube angle | 69.9° | 69.5° | 69.9° | 69.5° | 69.9° | 69.5° | 69.9° | 69.6° | 69.9° | 69.6° | 75.9° | 75.6° |
| Effective seat tube angle | 75.9° | 75.5° | 75.9° | 75.5° | 75.9° | 75.5° | 75.9° | 75.6° | 75.9° | 75.6° | 69.9° | 69.6° |
| C — Head tube length | 10 | 10 | 10 | 10 | 10.5 | 10.5 | 11 | 11 | 12.5 | 12.5 | 13.5 | 13.5 |
| D — Head angle | 65.9° | 65.5° | 65.9° | 65.5° | 65.9° | 65.5° | 65.9° | 65.6° | 65.9° | 65.6° | 65.9° | 65.6° |
| E — Effective top tube | 56.9 | 57 | 59.9 | 60 | 61.5 | 61.6 | 63.1 | 63.2 | 65.4 | 65.5 | 67.7 | 67.8 |
| F — Bottom bracket height | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 |
| G — Bottom bracket drop | 2.7 | 3.2 | 2.7 | 3.3 | 2.7 | 3.3 | 2.7 | 3.3 | 2.7 | 3.3 | 2.7 | 3.3 |
| H — Chainstay length | 43.4 | 43.5 | 43.4 | 43.5 | 43.4 | 43.5 | 43.4 | 43.5 | 43.4 | 43.5 | 43.4 | 43.5 |
| I — Offset | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 |
| J — Trail | 12 | 12.3 | 12 | 12.3 | 12 | 12.3 | 12 | 12.3 | 12 | 12.3 | 11.2 | 12.2 |
| K — Wheelbase | 115.3 | 115.4 | 118.3 | 118.4 | 120 | 120.1 | 121.7 | 121.8 | 124.4 | 124.4 | 126.8 | 126.8 |
| L — Standover | 72.4 | 71.9 | 74.4 | 73.9 | 74.9 | 74.4 | 75.4 | 74.9 | 76.4 | 75.9 | 76.4 | 75.9 |
| M — Frame reach | 41.9 | 41.5 | 44.9 | 44.5 | 46.4 | 46 | 47.9 | 47.5 | 49.9 | 49.5 | 51.9 | 51.5 |
| N — Frame stack | 59.6 | 59.9 | 59.6 | 59.9 | 60 | 60.4 | 60.5 | 60.8 | 61.9 | 62.2 | 63 | 63.1 |