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Selling fun since 1982
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Selling Fun for 25 Years
Trek Top Fuel 8 NX (2020) Matte Trek Black/Gloss Viper Red
Top Fuel 8 fuses the lightweight efficiency of a cross country bike with the capability and forgiveness of a trail bike. It's quick, nimble, and dishes out serious fun on flow trails and techy descents alike, with a 120 mm RockShox fork, 115 mm of rear tr
Top Fuel 8 fuses the lightweight efficiency of a cross country bike with the capability and forgiveness of a trail bike. It's quick, nimble, and dishes out serious fun on flow trails and techy descents alike, with a 120 mm RockShox fork, 115 mm of rear travel and a dropper post for getting low on the rough stuff. This bike is fully capable of shredding singletrack, racing gruelling endurance events and even holds its own on the XC course.
It's right for you if...
You’re looking for a do-it-all full suspension mountain bike that balances efficiency with capability. You want to rip rough trails, do a couple XC races and even test yourself with an endurance or stage race.
The tech you get
A lightweight Alpha Platinum Aluminium frame, 120 mm RockShox Recon RL fork with Motion Control damper, 115 mm of rear travel with a Fox Performance Float shock and a 1x12 SRAM NX Eagle drivetrain. Plus, Shimano hydraulic disc brakes, TwistLoc dual remote suspension lockout, Bontrager Line Dropper and Tubeless Ready Bontrager Kovee Comp 23 wheels.
The final word
Top Fuel 8 is an efficient, capable and ridiculously fun short-travel full suspension trail bike. It's built to take on technical terrain, flowy XC courses and the demands of endurance mountain bike races.
Why you'll love it
- This short-travel trail bike gives you a suspension set-up that’s capable in several MTB disciplines, and especially suited to endurance events
- TwistLoc simultaneously locks out front and rear shocks for climbs and sprints with the simple Grip Shift-like motion
- Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
- You get a Straight Shot down tube for extra stiffness in the rough and Knock Block frame defence to protect against spinning bars and fork crowns
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Platinum Aluminium, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 115 mm travel|
|Fork||RockShox Recon Gold RL, Solo Air spring, Motion Control damper, TwistLoc remote, tapered steerer, 46 mm offset, Boost110, 15 mm Maxle Stealth, 120 mm travel|
|Shock||Fox Performance Float, 2-position DPS damper, TwistLoc remote, tuned by Trek Suspension Lab, 190x45 mm|
|Suspension lever||SRAM TwistLoc dual remote|
|Max compatible fork travel||130mm|
|Front wheel||Bontrager Kovee Comp 23, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle|
|Rear wheel||Bontrager Kovee Comp 23, Tubeless Ready, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle|
|Rear skewer||Bontrager Switch thru axle, removable lever|
|Tyre||Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40"|
|Rim strip||Bontrager TLR|
|Max tyre size||29x2.40"|
|Shifter||SRAM NX Eagle, 12-speed|
|Rear derailleur||SRAM NX Eagle|
SRAM NX Eagle, DUB, 32T steel ring, Boost, 170 mm length
|Size: M, M/L, L, XL, XXL
SRAM NX Eagle, DUB, 32T steel ring, Boost, 175 mm length
|Bottom bracket||SRAM DUB, 92 mm, PressFit|
|Cassette||SRAM PG-1230 Eagle, 11-50, 12-speed|
|Chain||SRAM NX Eagle, 12-speed|
|Max. chainring size||36T|
|Saddle||Bontrager Arvada, steel rails, 138 mm width|
Bontrager Line Dropper, 100 mm travel, internal routing, 31.6 mm, 345 mm length
|Size: M, M/L, L, XL, XXL
Bontrager Line Dropper, 150mm travel, internal routing, 31.6 mm, 440mm length
|Handlebar||Bontrager Comp, alloy, 31.8 mm, 15 mm rise, 750 mm width|
|*Stem||Size: S, M, M/L
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 60 mm length
|Size: L, XL, XXL
Bontrager Rhythm Comp, 31.8 mm, Knock Block, 0-degree, 70 mm length
|Head set||Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8" top, 1.5" bottom|
|Brake||Shimano hydraulic disc, MT501 lever, MT500 caliper|
|*Brake rotor||Size: S, M, M/L, L, XL, XXL
Shimano RT56, 180 mm, 6-bolt
|Size: S, M, M/L, L, XL, XXL
Shimano RT56, 160 mm, 6-bolt
Sizing & fit
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise stated.
|Frame size number||Frame size letter||Geometry position||A — Seat tube||B — Seat tube angle||Effective seat tube angle||C — Head tube length||D — Head angle||E — Effective top tube||F — Bottom bracket height||G — Bottom bracket drop||H — Chainstay length||I — Offset||J — Trail||K — Wheelbase||L — Standover||M — Frame reach||N — Frame stack|