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2022

Top Fuel 8 Gen 3

Model 5259798

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.

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Our “Comparable Value” (Comp. Value) prices are based on the prices charged by Trek or other retailers, in-store or online, for the same or similar items. In most cases, this is a price at which Trek has offered the item for sale, and also the MSRP we provide to third-party resellers based on the prices of competing items in the market.

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*Please note - spec applies to all sizes unless listed separately

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 SID, DebonAir spring, Rush RL damper, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm Maxle Stealth, 120 mm travel
Shock RockShox Deluxe Ultimate RCT, 185mm x 50mm
Max compatible fork travel 130mm (541mm axle-to-crown)
Wheel front Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
Wheel rear Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''
Skewer rear Bontrager Switch thru axle, removable lever
Tire Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40"
Tire part Bontrager TLR sealant, 180 ml/6 oz
Rim strip Bontrager TLR
Max tire size Frame: 29x2.50", Fork: See manufacturer
Shifter Shimano XT M8100, 12 speed
Rear derailleur Shimano XT M8100, long cage
*Crank Size: S, M, ML, L
Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length
Size: XL, XXL
Shimano Deore M6120, 30T ring, 55 mm chainline, 175 mm length
Bottom bracket Shimano SM-BB52, 73mm, threaded external bearing
Cassette Shimano SLX M7100, 10-51T, 12 speed
Chain Shimano SLX M7100, 12 speed
Max chainring size 1x: 36T round, 34T oval, min 28T
Saddle Bontrager Arvada, steel rails, 138 mm width
*Seatpost Size: S
TranzX JD-YSP39, 100 mm travel, internal routing, 34.9 mm
Size: M, ML
TranzX JD-YSP39, 150 mm travel, internal routing, 34.9 mm
Size: L, XL, XXL
TranzX JD-YSP39, 170 mm travel, internal routing, 34.9 mm
*Handlebar Size: S
Bontrager Line, alloy, 35 mm, 27.5 mm rise, 750 mm width
Size: M, ML, L, XL, XXL
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Grips Bontrager XR Trail Comp, nylon lock-on
Stem Bontrager Elite, 35mm, 0 degree, 45mm length
Headset Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8" top, 1.5" bottom
Brake Shimano M6120 4-piston hydraulic disc
*Brake rotor Size: S, M, ML, L, XL, XXL
Shimano RT66, 6-bolt, 160mm
Size: S, M, ML, L, XL, XXL
Shimano RT66, 6-bolt, 180mm
Weight M - 14.26 kg / 31.44 lbs (with TLR sealant, no tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

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.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.