Trek 8 User manual

2024 Procaliber Alloy
SERVICE MANUAL

2024 Procaliber Alloy
1
Contents
2024Procaliber Alloy
5
Specifications
Chainline/Chainring
Chainline Max chainring
52mm 30T
55mm 34T
Rear brake mount
Minimum: 160mm
Maximum: 180mm with adapter
Rear O.L.D
148mm
Maximum tire size
29" x 2.4"
Notice: Measurements of actual tires may vary. Always
verify there is sufcient clearance between the tire and
the frame. Improper tire size could damage the bicycle
frame. Trek recommends 6mm clearance above and on
both sides of the tire.
Bottom bracket
BSA 73
Fork
Travel
Sag
Axle to Crown
Framesize Axle to Race (mm) Travel
S, M, ML,
L, XL
Recommended 520 120
Maximum 540 130
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.
1
3
2
2
Minimum insertion: Refer to manufacturer
1 Maximum insertion
Small: 210mm
Medium: 200mm
Medium/Large: 230mm
Large: 250mm
Extra large: 280mm
2Seat tube inside diameter: 31.6mm
3Seat tube post-clamp outer diameter:36.2 mm
Kickstand
??????
Rear axle and UDH Brake and shift
routing
Seat post dropper
routing
Frame guards Specications
Safety
WARNING
Tighten hardware properly
Always tighten hardware to the specied 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
Re-apply threadlocker
All reused-fasteners with a pre-applied threadlocker
must be cleaned with isopropyl alcohol and have new
threadlocker applied before re-assembly. If a threadlock-
er is not applied, the fasteners may loosen, which could
damage the bicycle and result in injury to the rider.
Scope
This manual contains parts diagrams, specications (such
as grease and torque values), instructions and helpful tips.
It does not contain instructions for all components (such
as brake callipers). Refer to the original manufacturer for
more information.
Legend
Apply grease
Do not apply grease
Apply threadlocker
Nm Torque
Zip tie
Additional resources
• Bicycle Owner’s Manual: trekbikes.com/manuals
• Trek’s YouTube channel: youtube.com/trekbikes
Copyright 2023 Trek Bicycle Corporation All Rights Reserved

2024 Procaliber Alloy
2
Rear axle and UDH
1
2
24 Nm
34
5
1Switch lever — W573860
2Thru-axle, 12x174mm — W600321
3Dérailleur hanger
NOTICE: Do not apply grease.
— W5271425
4Washer, 25 mm
NOTICE: The washer is frame-specic. Install only the washer size specied.
5Bolt, M12
NOTICE: Do not apply grease. Do not overtighten. Overtightening may damage the
hanger.

2024 Procaliber Alloy
3
Brake and shi routing


Shift housing
1. Housing exits the downtube.
2. Slide the foam sleeve over the housing.
3. Route the housing and foam sleeve up the downtube.
1
2
3
Rear brake hose
1. Thread the rear brake hose through the foam
sleeve.
2. Route the hose and foam sleeve up the downtube.
1Foam sleeves — W528082
2Rear brake hose
3Shift housing
Zip ties

2024 Procaliber Alloy
4
Seat post dropper routing
Bottom bracket must be removed to route the dropper housing.
1
1. Insert housing into the
downtube.
2. Route housing out the bottom of the downtube.
3. Slide the foam sleeve over the housing.
4. Route the foam sleeve and housing up the downtube.
5. Route the other end of the housing up the seat tube.
1Foam sleeve — W528082

2024 Procaliber Alloy
5
Frame guards
2
1
1Chainstay guard — W5293689
2Downtube guard:
SM/MD/ML frames — W5308424
LG/XL frames — W5308425
Use isopropyl alcohol to clean the frame surface where the guard is attached. Wait for the alcohol to dry before apply-
ing the guard.
NOTICE: Do not clean the entire frame with isopropyl alcohol. Isopropyl alcohol could damage the paint.

2024 Procaliber Alloy
6
Specications
Chain line/Chain ring
Chain line Max chain ring
52 mm 30T
55 mm 34T
Rear brake mount
Minimum: 160 mm
Maximum: 180 mm with adapter
Rear O.L.D.
148 mm
Maximum tyre size
29" x 2.4"
Notice: Measurements of actual tyres may vary. Always
verify that there is sufcient clearance between the tyre
and the frame. Improper tyre size could damage the
bicycle frame. Trek recommends 6mm clearance above
and on both sides of the tyre.
Bottom bracket
BSA 73
Fork
Travel
Sag
Axle to Crown
Frame size Axle to Race (mm) Travel
S, M, ML,
L, XL
Recommended 520 120
Maximum 540 130
Seat post
WARNING
Always follow the seat post manufacturer’s minimum
insertion recommendation. Failure to follow the recom-
mendation could cause damage to the seat post and
result in injury to the rider.
1
3
2
Minimum insertion: Refer to seat post manufacturer.
1 Maximum insertion
Small: 210 mm
Medium: 200 mm
Medium/Large: 230 mm
Large: 250 mm
Extra large: 280mm
2Seat tube inside diameter: 31.6 mm
3Seat tube post-clamp outer diameter: 36.2 mm