Trek DOMANE AL GEN 4 User manual
SERVICE MANUAL
2024 DOMANE AL GEN 4
Domane AL Gen 4
1
Contents
About this manual Brake/shift routing
Universal derailleur hanger
(UDH) Chain keeper
Head set Install the headset Frame mounts
Copyright 2023 Trek Bicycle Corporation All Rights Reserved
Domane AL Gen 4
2
About this manual
Scope
This manual contains parts diagrams, specications (such
as grease and torque values), instructions, part numbers
and helpful tips. It does not contain instructions for all
components (such as brake callipers). Refer to the original
manufacturer for more information.
Replacement parts
Trek recommends using only Trek OEM (original
manufacturer) replacement parts.
Additional info
The Owner’s Manual is available at
Trekbikes.com/manuals.
Legend
Cable (zip) tie
Nm Torque value
Apply appropriate threadlocker
Apply appropriate grease
Safety
WARNING
Tighten hardware properly
Always tighten hardware to the specied 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.
Domane AL Gen 4
3
Brake/shi routing
7
See
Headset
for routing
detail
2.5 Nm
8
3
352
65
1
3
5
21
2
9
4
7
2.5 Nm
10
5
1Front brake hose.
2 Rear brake hose
3Rear derailleur housings
4Rear derailleur cable
5Front derailleur housing
6Front derailleur cable
7 Fastener (M5x10 mm)
W575392
8 Cable guide
9Foam sleeves – W528082
10
Cable guide (P-clamp) – 553369
NOTE: This part is used with Shimano 105
front derailleurs only.
Domane AL Gen 4
4
Universal derailleur hanger (UDH)
5
10 Nm
4
1
2
3
25 Nm
1Rear derailleur hanger
NOTICE: Do not apply grease.
W5271424
2Washer (25 mm)
3
Bolt (M12)
NOTICE: Do not apply grease. Left-hand thread. Do not
over-tighten. Over-tightening could cause the hanger to
break.
4Lever (6 mm Allen) – 5321899
5Thru-axle (M12x166 mm) – 5312169
For additional information about the UDH, refer to the
SRAM user manual at sram.com.
Domane AL Gen 4
5
Chain keeper
Rotate the chain keeper as necessary so
there is 1 mm of clearance to the chain.
1 mm
1
5 Nm
3
2
1Fastener (M5x16 mm)
431223
2Chain keeper (30-36T)
3Washer
Domane AL Gen 4
6
Head set
See Install the headset on pages 7-9 for complete instructions.
1
3
IMPORTANT: Fully tighten the top
two fasteners before the bottom
two (there will be a gap on the
bottom).
Ridge on top
≤10 Nm
≤4 Nm
2
Steerer tube/fork
4
5
6
7
8
9
9
10
11
12
5.2 Nm
12
5.2 Nm
13
13
Optional spacers
1Top cap fastener
W547432
2Top cap
3Compression plug
4Spacers, 5 mm – 5253930
5Spacers, 10 mm – 5253931
6Shroud – W5308932
7Bearing cover – W5274615
8Split ring – W5274269
9Bearings – W540243
10 Stem, Elite (°7 x 80 mm)
587666
11 Face plates
12 Stem fasteners (M5x15 mm)
13 Washers (M5)
Domane AL Gen 4
7
Install the headset
1. Install the compression plug into the steerer tube.
≤10 Nm
2. Grease the headset bearings and locations shown
below.
Domane AL Gen 4
8
3. Route the split ring down the steerer tube and seat it
into the upper bearing.
1Rear derailleur housing
2 Rear brake hose
3Front brake hose.
4Front derailleur housing
1
2 3
4
Split ring
4. Route the bearing cover and shroud through the
housings and snap them together. Make sure to
press together any gaps.
TIP: Squeeze the shroud from the sides to attach it to
the bearing cover more easily.
Hooks
1
2 3
4
Install the headset (continued)
Domane AL Gen 4
9
5. Slide the spacers and stem down the steerer tube –
do not tighten the stem fasteners.
Required spacer
6. Install the top cap and top cap fastener.
≤4 Nm
7. Tighten the stem fasteners – alternating between
them – until both are torqued to 5.2 Nm.
5.2 Nm 5.2 Nm
8. Install the face plates and face plate fasteners. Fully
tighten the top two bolts before the bottom two (there
will be a gap on the bottom).
5.2 Nm
X4
Ridge
Gap
Install the headset (continued)
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