Trek Top Fuel 5 Gen 4 2025

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Top Fuel 5 Gen 4 is a nimble alloy trail bike that's ready to hammer up climbs and hold its own on descents – all without breaking the bank. It offers 130mm of front and 120mm of rear suspension that gives you just enough squish to soak up chatter without draining your power on all-day pedal fests. It comes equipped with a RockShox suspension package and Shimano Deore groupset that gives you everything you need to rip in an economical package.

Frame

Alpha Platinum Aluminium, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120 mm 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

Max compatible fork travel

Frame	Alpha Platinum Aluminum, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel
Fork	RockShox Recon Silver RL, Solo Air, Motion Control damper, lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
Shock	X-Fusion Pro 2, 2-position damper, 185mm x 50mm
Max compatible fork travel	140mm

Wheels

Hub front	Bontrager alloy, 6-bolt, Boost110, 15 mm thru-axle
Hub rear	Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle
Skewer rear	Bontrager Switch thru axle, removable lever
Rim	Bontrager Line TLR 30, Tubeless Ready, 32-hole, Presta valve
*Tire	Size: S Bontrager Gunnison Elite XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40''
*Tire	Size: M, ML, L, XL Bontrager Gunnison Elite XR, Tubeless Ready, wire bead, 60 tpi, 29x2.40''
Tire part	Bontrager TLR sealant, 180 ml/6 oz
Rim strip	Bontrager TLR
Max tire size	Frame: 29x2.50", Fork: See manufacturer

Drivetrain

Shifter	Shimano Deore M6100, 12 speed
Rear derailleur	Shimano Deore M6100, long cage
Crank	Shimano MT512, 30T ring, 55mm chainline, 170mm length
Bottom bracket	Shimano BB-MT501 BSA
Cassette	Shimano Deore M6100, 10-51, 12 speed
Chain	Shimano Deore M6100, 12 speed
Max chainring size	1x: 34T, min 30T

Components

Saddle	Bontrager Verse Short, stainless steel rails
*Seatpost	Size: S TranzX JD-YSI22, 100mm travel, internal routing, 34.9mm, 342mm length
*Seatpost	Size: M, ML, L, XL TranzX JD-YSI22, 170mm travel, internal routing, 34.9mm, 489mm length
Handlebar	Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Grips	Bontrager XR Trail Comp, nylon lock-on
Stem	Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length
Brake	Shimano MT200 hydraulic disc
Brake rotor	Shimano RT26, 6-bolt, 180mm
Rotor size	Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer

Accessories

Bag	Bontrager BITS Internal Frame Storage Bag

Weight

Weight	M - 15.90 kg / 35.06 lbs
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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