Trek Fuel EX 8 GX Bike
Fuel EX 8 is the ideal trail bike for riders who want a versatile full suspension ripper that makes soul-crushing climbs less painful, but can also huck rowdy trails. It hits the sweet spot of value and performance in our mountain bike lineup by combining high-end parts with a stout but light alloy frame.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
| 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 |
Wheels
| 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, 54T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle |
| Size: S , M , ML , L , XL , XXL Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Rapid Drive 54, SRAM XD driver, Boost148, 12mm thru axle |
|
| Skewer rear | Bontrager Switch thru axle, removable lever |
| *Tire | Size: XS , S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5×2.40” |
| Size: XS , S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5×2.60” |
|
| Size: S , M , ML , L , XL , XXL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29×2.40” |
|
| Size: S , M , ML , L , XL , XXL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29×2.60” |
|
| *Tire part | Size: XS , S , M , ML , L , XL , XXL Bontrager TLR sealant, 6oz |
| Size: XS , S , M , ML , L , XL , XXL Bontrager TLR valve, 50mm |
Drivetrain
| Shifter | SRAM GX Eagle, 12 speed |
|---|---|
| Rear derailleur | SRAM GX Eagle |
| *Crank | Size: XS , S SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 170mm length |
| Size: M , ML , L , XL , XXL SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 175mm length |
|
| Bottom bracket | SRAM DUB, 92mm, PressFit |
| Cassette | SRAM Eagle XG-1275, 10-52, 12 speed |
| Chain | SRAM GX Eagle, 12 speed |
Components
| 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 Line, 35mm, Knock Block, 0 degree, 40mm length |
| Size: M , ML , L , XL , XXL Bontrager Line, 35mm, Knock Block, 0 degree, 50mm length |
|
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8” top, 1.5” bottom |
| Brake | SRAM G2 R 4-piston hydraulic disc |
| *Brake rotor | Size: XS , S , M , ML , L , XL , XXL SRAM CenterLine, 6-bolt, round edge, 180mm |
| Size: M , ML , L , XL , XXL SRAM CenterLine, 6-bolt, round edge, 200mm |
Weight
| Weight | M – 13.78 kg / 30.39 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). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local retailer.
Rider Height
Inseam
XS
137.0 – 155.0 cm
4’5.9″ – 5’1.0″
64.0 – 73.0 cm
25.2″ – 28.7″
S
153.0 – 166.5 cm
5’0.2″ – 5’5.6″
72.0 – 79.0 cm
28.3″ – 31.1″
M
161.0 – 172.0 cm
5’3.4″ – 5’7.7″
76.0 – 81.0 cm
29.9″ – 31.9″
M/L
165.5 – 179.0 cm
5’5.2″ – 5’10.5″
77.0 – 84.0 cm
30.3″ – 33.1″
L
177.0 – 188.0 cm
5’9.7″ – 6’2.0″
83.0 – 88.0 cm
32.7″ – 34.6″
XL
186.0 – 196.0 cm
6’1.2″ – 6’5.2″
87.0 – 92.0 cm
34.3″ – 36.2″
2XL
195.0 – 203.0 cm
6’4.8″ – 6’7.9″
92.0 – 95.0 cm
36.2″ – 37.4″
All measurements provided in cm unless otherwise noted.
| Frame size number | Frame size letter | Geometry position | Wheel size | A — Seat tube | B — Seat tube angle | Effective seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | F — Bottom bracket height | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.0 | XS | Low | 27.5″ | 35.6 | 69.0° | 75.0° | 9.0 | 66.0° | 54.6 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 112.0 | 69.5 | 39.5 | 56.3 |
| 14.0 | XS | High | 27.5″ | 35.5 | 69.5° | 75.5° | 9.0 | 66.5° | 54.5 | 34.1 | 1.4 | 43.6 | 4.3 | 10.6 | 111.9 | 70.0 | 40.0 | 55.9 |
| 15.5 | S | High | 27.5″ | 39.5 | 69.5° | 75.5° | 10.0 | 66.5° | 56.7 | 34.1 | 1.4 | 43.6 | 4.3 | 10.6 | 114.3 | 70.7 | 42.0 | 56.8 |
| 15.5 | S | Low | 27.5″ | 39.5 | 69.0° | 75.0° | 10.0 | 66.0° | 56.8 | 33.5 | 2.1 | 43.7 | 4.3 | 11.1 | 114.4 | 70.0 | 41.5 | 57.2 |
| 15.5 | S | High | 29″ | 39.5 | 68.0° | 75.5° | 10.0 | 66.5° | 57.7 | 34.6 | 2.8 | 43.6 | 4.3 | 11.5 | 115.3 | 70.7 | 42.0 | 60.5 |
| 15.5 | S | Low | 29″ | 39.5 | 67.5° | 75.0° | 10.0 | 66.0° | 57.8 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 115.4 | 70.1 | 41.5 | 60.9 |
| 17.5 | M | Low | 29″ | 42.0 | 67.5° | 75.0° | 10.0 | 66.0° | 60.3 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 117.9 | 74.2 | 44.0 | 60.9 |
| 17.5 | M | High | 29″ | 42.0 | 68.0° | 75.5° | 10.0 | 66.5° | 60.2 | 34.6 | 2.8 | 43.6 | 4.3 | 11.6 | 117.8 | 74.8 | 44.5 | 60.5 |
| 18.5 | ML | Low | 29″ | 43.5 | 67.5° | 75.0° | 10.5 | 66.0° | 61.9 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 119.6 | 74.5 | 45.5 | 61.3 |
| 18.5 | ML | High | 29″ | 43.5 | 68.0° | 75.5° | 10.5 | 66.5° | 61.8 | 34.6 | 2.8 | 43.6 | 4.3 | 11.6 | 119.5 | 75.1 | 46.0 | 60.9 |
| 19.5 | L | Low | 29″ | 45.0 | 67.5° | 75.0° | 10.5 | 66.0° | 63.4 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 121.1 | 75.0 | 47.0 | 61.3 |
| 19.5 | L | High | 29″ | 45.0 | 68.0° | 75.5° | 10.5 | 66.5° | 63.3 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 121.0 | 75.6 | 47.5 | 60.9 |
| 21.5 | XL | Low | 29″ | 50.0 | 67.5° | 75.0° | 12.0 | 66.0° | 66.3 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 124.2 | 76.2 | 49.5 | 62.7 |
| 21.5 | XL | High | 29″ | 50.0 | 68.0° | 75.5° | 12.0 | 66.5° | 66.2 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 124.1 | 76.8 | 50.0 | 62.3 |
| 23.0 | XXL | Low | 29″ | 54.0 | 67.5° | 75.0° | 14.0 | 66.0° | 68.8 | 34.0 | 3.4 | 43.7 | 4.3 | 11.9 | 127.0 | 80.0 | 51.5 | 64.5 |
| 23.0 | XXL | High | 29″ | 54.0 | 68.0° | 75.5° | 14.0 | 66.5° | 68.7 | 34.6 | 2.7 | 43.6 | 4.3 | 11.6 | 126.9 | 80.6 | 52.0 | 64.1 |
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