Trek Fuel Ex 8 Gen 5 Mountain Bike
Will my bike have a curved top tube?
Smaller frames (XS and S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
Active Braking Pivot
Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.
RE:aktiv
RE:aktiv technology gives you firm support for efficient pedaling that instantly gives way for smooth control when the trail turns rough.
Straight Shot w/Knock Block
Trek’s Straight Shot frame design optimizes the stiffness-to-weight ratio for a more responsive ride. You’ll be able to push harder and stay more planted on your line when the going gets rough.
| Frame | Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel |
|---|---|
| Fork | Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel |
| *Shock | Size: XS , S Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 52.5mm |
| Size: S , M , ML , L , XL , XXL Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 55mm | |
| Max compatible fork travel | 150mm (561mm axle-to-crown) |
| Wheel front | Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| *Wheel rear | Size: XS , S Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 54, 6-bolt, Boost148, 12mm thru axle |
| Size: S , M , ML , L , XL , XXL Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle | |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| *Tire | Size: XS , S Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 27.5×2.50” |
| Size: S , M , ML , L , XL , XXL Bontrager XR5 Team Issue, Tubeless Ready, aramid bead, 120 tpi, 29×2.50” | |
| Tire part | Bontrager TLR sealant, 6oz |
| Rim strip | Bontrager TLR |
| Max tire size | Frame: 29×2.60″, Fork: See manufacturer |
| Shifter | Shimano XT M8100, 12 speed |
|---|---|
| Rear derailleur | Shimano XT M8100, long cage |
| *Crank | Size: XS , S , M , ML , L Shimano SLX M7100, 30T alloy ring, 52mm chainline, 170mm length |
| Size: XL , XXL Shimano SLX M7100, 30T alloy ring, 52mm chainline, 175mm length | |
| Bottom bracket | Shimano MT500, 92mm, PressFit |
| Cassette | Shimano XT M8100, 10-51, 12 speed |
| Chain | Shimano SLX M7100, 12 speed |
| Max chainring size | 1x: 34T |
| Saddle | Bontrager Arvada, hollow chromoly rails, 138mm width |
|---|---|
| *Seatpost | Size: XS , S Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length |
| Size: M , ML , L , XL , XXL Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length | |
| *Handlebar | Size: XS , S Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width |
| Size: M , ML , L , XL , XXL Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width | |
| Grips | Bontrager XR Trail Elite, nylon lock-on |
| *Stem | Size: XS , S Bontrager Elite, 35mm, 0 degree, 35mm length |
| Size: M , ML , L , XL , XXL Bontrager Elite, 35mm, 0 degree, 45mm length | |
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8” top, 1.5” bottom |
| *Brake | Size: XS , S , M , ML , L , XL , XXL Shimano hydraulic disc, MT4100 lever, MT420 4-piston caliper |
| Size: XS , S , M , ML , L , XL , XXL Shimano 4-piston hydraulic disc, MT4100 lever, MT420 caliper | |
| *Brake rotor | Size: XS , S , M , ML , L , XL , XXL Shimano RT66, 6-bolt, 180mm |
| Size: M , ML , L , XL , XXL Shimano RT66, 6-bolt, 203mm |
| Weight | M – 13.86 kg / 30.56 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). |
| Size | Rider Height | Inseam |
|---|---|---|
| XS | 145 – 155 cm 4’9″ – 5’1″ | 69 – 73 cm 27″ – 29″ |
| S | 155 – 165 cm 5’1″ – 5’5″ | 74 – 78 cm 29″ – 31″ |
| M | 165 – 176 cm 5’5″ – 5’9″ | 79 – 83 cm 31″ – 33″ |
| M/L | 173 – 180 cm 5’8″ – 5’11” | 81 – 86 cm 32″ – 34″ |
| L | 177 – 188 cm 5’10” – 6’2″ | 84 – 89 cm 33″ – 35″ |
| XL | 188 – 195 cm 6’2″ – 6’5″ | 89 – 91 cm 35″ – 36″ |
| 2XL | 195 – 203 cm 6’5″ – 6’8″ | 91 – 97 cm 36″ – 38″ |
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