*PLEASE NOTE: THIS BIKE IS ONLY AVAILABLE FOR IN-STORE PICK UP.

Fuel EX 8 is the ideal trail bike for mountain bikers who want a versatile full suspension ripper that can crush marathon and multi-stage races and still huck with the enduro crew. It hits the sweet spot of value and performance in our mountain bike lineup with an Alpha Aluminum frame, 140mm front and 130mm rear suspension, and SRAM GX Eagle 12-speed drivetrain.

You're cool with your wheels leaving the ground, but you also like to go the distance on marathon singletrack sessions and aim to clear every rock garden on the first try. You want exceptional trail bike performance, with the same MTB frame and suspension tech found on higher-end trail bikes, at an exceptional value.

A lightweight Alpha Platinum Aluminum frame, a 140mm FOX Rhythm 34 fork and 130mm of rear travel with a FOX Performance Float shock with Trek's exclusive RE:aktiv damper—it's enough suspension to go big while staying fast on the flats and climbs. A SRAM GX Eagle 1x12 drivetrain with a wide-range 10-50 cassette, Tubeless Ready Bontrager Line Comp 30 wheels, Shimano Deore hydraulic disc brakes, and a Bontrager Line dropper post for on-the-fly saddle height adjustments.

It's a trail bike that is fully capable keeping up with whatever you throw at it. It has the same frame and suspension tech found on our top-of-the-line trail bikes, with a SRAM GX Eagle 1x12 drivetrain that delivers a huge range of gearing with the simplicity of a single shifter.

This bike is perfect for shredding singletrack, hitting drops, and pushing your limits in multi-stage and marathon events
If you measure quality in performance per dollar, you won't do better than Fuel EX 8
You sense its capability immediately, like when you're charging through sections of trail you never thought you'd clean
The shifter-style, underbar remote dropper post lever is super intuitive and easy to use
We expanded our size range to ensure a better fit for all riders. And, you get the fastest wheel that fits your frame: XS frames get 27.5˝ wheels, S frames get to choose between 27.5˝ or 29˝, and sizes M to XL get 29˝ wheels

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, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x52.5mm
*Shock	Size: S , M , ML , L , XL , XXL Fox Performance Float EVOL, RE:aktiv 3-position damper, tuned by Trek Suspension Lab, 210x55mm

Wheels

Front wheel	Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Rear wheel	Bontrager Line Comp 30, Tubeless Ready, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle
*Tire	Size: XS , S Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60''
*Tire	Size: S , M , ML , L , XL , XXL Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60''

Drivetrain

Shifter	SRAM GX Eagle, 12 speed
Rear derailleur	SRAM GX Eagle
*Crank	Size: XS , S Truvativ Descendant 6k Eagle, DUB, 30T steel ring, Boost (52mm chainline), 170mm length
*Crank	Size: M , ML , L , XL , XXL Truvativ Descendant 6k Eagle, DUB, 30T steel ring, Boost (52mm chainline), 175mm length
Bottom bracket	SRAM DUB, 92mm, PressFit
Cassette	SRAM XG-1275 Eagle, 10-50, 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
*Seatpost	Size: M , ML , L , XL , XXL Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length
Handlebar	Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Grips	Bontrager XR Trail Elite, alloy lock-on
*Stem	Size: XS , S Bontrager Line, 35mm, Knock Block, 0 degree, 40mm length
*Stem	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	Shimano Deore M6000 hydraulic disc
*Brake rotor	Size: XS , S , M , ML , L , XL , XXL Shimano RT66, 6-bolt, 180mm
*Brake rotor	Size: M , ML , L , XL , XXL Shimano RT66, 203mm, 6-bolt

Weight

Weight	M - 14.42 kg / 31.79 lbs (with tubes)
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

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 Trek 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	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
13.5	XS	High	27.5"	35.5	75.5°	9.0	66.5°	54.5	34.1	1.4	43.5	4.3	10.7	111.9	70.0	40.0	55.9
13.5	XS	Low	27.5"	35.6	75.0°	9.0	66.0°	55	33.5	2.1	43.7	4.3	11.1	112.0	69.5	39.5	56.3
15.5	S	High	27.5"	35.5	75.5°	10.0	66.5°	56.7	34.1	1.4	43.5	4.3	10.8	114.3	70.6	42.0	56.8
15.5	S	Low	27.5"	39.5	75.0°	10.0	66.0°	56.8	33.5	2.1	43.7	4.3	11.1	114.4	70.1	41.5	57.2
15.5	S	High	29"	39.5	75.5°	10.0	66.5°	57.7	34.6	2.8	43.5	4.3	11.5	115.3	70.6	42.0	60.5
15.5	S	Low	29"	39.5	75.0°	10.0	66.0°	57.8	33.9	3.4	43.7	4.3	11.9	115.4	70.1	41.5	60.8
17.5	M	High	29"	42.0	75.5°	10.0	66.5°	60.2	34.6	2.8	43.5	4.3	11.6	117.8	74.8	44.5	60.5
17.5	M	Low	29"	42.0	75.0°	10.0	66.0°	60.3	33.9	3.4	43.7	4.3	11.9	117.9	74.2	44.0	60.8
18.5	ML	High	29"	43.5	75.5°	10.5	66.5°	61.8	34.6	2.7	43.5	4.3	11.6	119.5	75.1	46.0	60.9
18.5	ML	Low	29"	43.5	75.0°	10.5	66.0°	61.9	33.9	3.4	43.7	4.3	11.9	119.6	74.5	45.5	61.3
19.5	L	High	29"	45.0	75.5°	10.5	66.5°	63.3	34.6	2.7	43.5	4.3	11.6	121.0	75.6	47.5	60.9
19.5	L	Low	29"	45.0	75.0°	10.5	66.0°	63.4	33.9	3.4	43.7	4.3	11.9	121.1	75.0	47.0	61.3
21.5	XL	High	29"	50.0	75.5°	12.0	66.5°	66.1	34.6	2.7	43.5	4.3	11.6	124.1	76.8	50.0	62.3
21.5	XL	Low	29"	50.0	75.0°	12.0	66.0°	66.3	33.9	3.4	43.7	4.3	11.9	124.2	76.2	49.5	62.7
23	XXL	High	29"	54.0	75.5°	14.0	66.5°	68.6	34.6	2.7	43.5	4.3	11.6	126.9	80.6	52.0	64.1
23	XXL	Low	29"	54.0	75.0°	14.0	66.0°	68.8	33.9	3.4	43.7	4.3	11.9	127.0	80.0	51.5	64.5

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

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