Trek 2023 FUEL EX Service Manual page 2

Contents
Safety
Adjustable headset Rocker pivot and
Derailleur hanger Main pivot and
Safety
WARNING
Properly tighten hardware
Always tighten hardware to the specified torque.
Over-tightening hardware could deform or break the
hardware or components. Under-tightening hardware
could cause hardware or components to become loose.
Either situation could damage the bicycle and result in
injury to the rider.
WARNING
Reapply threadlocker
All reused-fasteners with pre-applied threadlocker must
be cleaned with isopropyl alcohol and have new thread-
locker applied before re-assembly. If threadlocker is not
applied, the fasteners may loosen which could damage
the bicycle and result in injury to the rider.
Active Braking Rear shock
Pivot (ABP) hardware and
dimensions
Adjust the
seatstay progression
Cable routing
chainstay
Copyright 2022 Trek Bicycle Corporation All Rights Reserved
Frame guards — Adjust the
carbon frame geometry —
headset angle
Frame guards — Adjust the
aluminum frame geometry —
seatstay mino link
Specifications
Chainline (1x only)
55mm
Chainring (1x only)
Minimum Maximum
28T Round: 34T
Oval: 32T
Rear brake mount
Minimum Maximum
180mm, direct mount Adaptable to 203mm
Maximum tire size
Notice: Measurements of actual tires may vary. Always
verify there is sufficient clearance between the tire and
the frame. Improper tire size could damage the bicycle
frame. Trek recommends 6mm clearance above and on
the sides of the tire.
Wheel set Maximum tire size
29" 29" x 2.5"
27.5" (XS and S frame) 27.5" x 2.5"
Bottom bracket /ISCG tabs
Down tube storage Specifications
Bottom bracket ISCG tabs
BSA 73 ISCG 05, 3 bolt
Legend
Apply grease
Do not apply grease
Apply threadlocker
Nm
Torque
Hex tool
Torx tool
Drift size
  Zip tie
2023 Fuel EX
2023 Fuel EX
Seat post
WARNING
Always follow the seatpost manufacturer's minimum
insertion recommendation. Failure to follow the recom-
mendation could cause damage to the seatpost and
result in injury to the rider.
Measurement
Maximum Frame Carbon Aluminum
insertion
XS 205mm 180mm
S (27.9" and
225mm 210mm
29" wheels)
M 255mm 240mm
ML 266mm 250mm
L 281mm 265mm
XL 316mm 300mm
XXL — 330mm
Seat tube inside diameter 34.9
Seat tube post clamp 39.5
outer diameter
Fork
WARNING
Exceeding the recommended maximum fork length could
damage the bicycle and result in injury to the rider.
Travel
Sag
Axle to Crown
Frame/ Axle to Race Travel
Wheel Size (mm) (mm)
XS and S / Recommended 534 140
27.5" wheels Maximum 550 150
S, M, ML, L, XL, XXL / Recommended 562 150
Maximum 578 160
29" wheels
Refer to the suspension setup card included with your bike
or the suspension calculator at
trekbikes.com/suspension-calculator.
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