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Top Fuel 8 Gen 4
Overview
Features
Specs
Sizing
Geometry
Service
Reviews
Overview
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
"More capable & adaptable than ever"
"The Top Fuel manages to feel quick and efficient without any harshness, a feat that's not easy to accomplish."
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"increased versatility and broader appeal"
"The added ability to futz with not just head/seat angle and bb height, but also play with shock progression AND maybe even long-stroke the bike for more travel is appealing."
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"enthusiastic and sporty, offering up impressive pedal efficiency with loads of grip."
"Mind you, it only took a few pedal strokes to appreciate the Top Fuel’s efficient and responsive demeanour.[...]Heading across rockier singletrack, the new bike is noticeably sprightlier and springier than its predecessor."
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"Dear lord, this bike is a hoot"
"I keep finding myself on top of bigger moves than Trek would probably recommend for the Top Fuel, and I keep bouncing out the bottom more in love with the bike."
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"light, lively, and efficient"
"...the Top Fuel stands out for being just a touch more composed and forgiving (in terms of its suspension performance) than most of the bikes that it compares most directly to on paper."
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Service manual
Time to bust out the repair stand for some maintenance? Find a detailed breakdown of your bike with part numbers, torque values, and platform-specific tech instructions below.
Get it here
Which Generation?
Save some cash on the light and fast Top Fuel Gen 3, or go even lighter with more adjustability with Top Fuel Gen 4
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