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Trek Top Fuel 8 Gen 4

Trek Top Fuel 8 Gen 4
  • Color: Lichen Green
  • Color: Matte Dark Web
$3,999.99
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Details

Top Fuel 8 Gen 4 is a nimble alloy trail bike that strikes a balance between quick climbing efficiency and descending confidence. It packs in a versatile 130mm front and 120mm rear travel for ripping over rocks and roots without sacrificing power on ascents. It's built from lightweight Alpha Platinum Aluminum that helps save your budget for bike trips, but packs in upgrades where they matter, like a 12-speed Shimano XT and SLX drivetrain, and a Fox Rhythm 34 fork.

IT'S RIGHT FOR YOU IF…
You want an alloy full suspension that's ready to rip. You like to ride everything from cross-country hot laps to all-mountain adventures, and you need a bike that's light, versatile, and confident. You've got an appreciation for the durability of aluminum, but want upgrades where they matter, like your drivetrain and suspension.

THE TECH YOU GET
An Alpha Platinum Aluminum frame equipped with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. A 130mm FOX Rhythm 34 fork with Float EVOL air spring and GRIP damper, plus 120mm of rear travel from a FOX Performance Float shock with a 3-position damper. It's topped off with a Shimano XT/SLX 12-speed groupset, hydraulic disc brakes, a Bontrager Line dropper post, and Tubeless Ready Bontrager Line Comp 30 wheels.

THE FINAL WORD
Top Fuel 8 Gen 4 is ready to cut loose from all-day climbs to rooty descents. It balances capability and efficiency, with just enough travel to keep the ride smooth without eating up your pedaling power. It gives you the perfect blend of affordability, with a rugged alloy frame, and upgrades where they matter, like the Shimano XT/SLX drivetrain.

WHY YOU'LL LOVE IT
- Its lightweight frame and versatile geometry make it the perfect choice for all kinds of rides and all kinds of riders
- The 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride
- You get a sweet balance of price and performance with upgraded components and a rugged alloy frame
- The Alpha Platinum Aluminum frame is robust, yet light, and packs in updated internal frame storage for easy access to gear and snacks
- It's 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

Sizes:
Frame SizeSmallMediumMedium / LargeLargeX-Large
Geometry positionHigh / Low High / LowHigh / LowHigh / LowHigh / Low
Seat tube (cm)36 414243.547
Seat tube angle69.5° / 69° 70.5° / 70°70.5° / 70°70.5° / 70°70.5° / 70°
Effective seat tube angle76.5° / 76° 77.3° / 76.9°76.6° / 76.276.3° / 75.9°75.6° / 75.2°
Head tube length (cm)10.5 10.51111.513.5
Head angle65.9° / 65.5° 65.9° / 65.5°65.9° / 65.565.9° / 65.5°65.9° / 65.5°
Effective top tube (cm)55.8 / 55.9 58.7 / 58.861.1 / 61.263 / 63.167.2 / 67.3
Bottom bracket drop (cm)1 / 1.6 2.6 / 3.22.6 / 3.22.6 / 3.22.6 / 3.2
Chainstay length (cm)43.4 / 43.5 43.4 / 43.543.9 / 4443.9 / 4444.4 / 44.5
Offset (cm)4.3 4.34.34.34.3
Trail (cm)11.1 / 11.5 12.1 / 12.512.1 / 12.512.1 / 12.512.1 / 12.5
Wheelbase (cm)115 / 115.1 118.8 / 118.8121 / 121122.7 / 122.7127 / 127.1
Standover (cm)70.5 / 70 75.5 / 7575.7 / 75.275.8 / 75.376.3 / 75.8
Frame reach (cm)42.2 / 41.7 45.2 / 44.746.7 / 46.248.2 / 47.751.2 / 50.7
Frame stack (cm)56.6 / 57 59.9 / 60.360.4 / 60.760.8 / 61.262.6 / 63
Sizes:
Frame SizeRider Height (cm)Rider HEight (cm)Rider Height (in)
Small155 - 165 5'1" - 5'5"
Medium165 - 176 5'5" - 5'9"
Medium / Large173 - 180 5'8" - 5'11"
Large177 - 188 5'10" - 6'2"
X-Large188 - 195 6'2" - 6'5"

Specs

Pedals Sold Separately
Fork Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 130mm travel
Stem Bontrager Elite, 35mm, 0 degree, 45mm length
Chain Shimano SLX M7100, 12 speed
Frame Alpha Platinum Aluminum, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120mm travel
Tires Bontrager Gunnison Pro XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40''
Brakes Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper // Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper
Rotors Shimano RT66, 6-bolt, 180mm
Saddle Bontrager Verse P3, chromoly rails
Crankset Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length
Seatpost Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length
Shifters Shimano XT M8100, 12 speed
Handlebars Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Tape/Grips Bontrager XR Trail Comp, nylon lock-on
Rear Derailleur Shimano XT M8100, long cage
Cassette/Freewheel Shimano SLX M7100, 10-51T, 12 speed
Wheels 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''
Rear Shock Fox Performance Float DPS, 2-position damper, 185mm x 50mm
Bottom Bracket Shimano BB-MT501 BSA

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Lichen Green / Large / 29-inch 197216022374 5319321 TOP20447411N
Matte Dark Web / Small / 27.5-inch 197216022299 5319313 TOP24955726B
Matte Dark Web / Large / 29-inch 197216022329 5319316 TOP21489015B
Lichen Green / Medium/Large / 29-inch 197216022367 5319320 TOP21659435N
Lichen Green / X-Large / 29-inch 197216022381 5319322 TOP21582977N
Matte Dark Web / X-Large / 29-inch 197216022336 5319317 TOP22963254B