ARGON18 GALLIUM PRO DISC 338A 2021 User manual

GALLIUM PRO DISC 338A: ASSEMBLY GUIDE
Valid for MY2021 Gallium Pro Disc 338A
Revision 1.0 - 12.01.2020

2
1. Tools Needed and First Aid Kit ..........................3
2. Frameset Inspection ...................................4
3. Frameset Parts, SKUs and descriptions ................5-6
4. Assembly instructions ..............................7-21
4.1. Headset Installation ...............................7
4.2. Seat Post Collar Assembly..........................8
4.3. Seat Post Assembly .............................9-10
4.4. Rear Derailleur Hanger Adjustment ................11
 4.5.Mechanicalgroupsetspecication ..............12-14
 4.6.Electronic(Di2)groupsetspecication ..........15-18
 4.7.Electronic(Wireless)groupsetspecication .....19-21
5.Troubleshooting/Tips/Specication ..................22
6. Min/Max Seat Post Insertion ...........................23
GALLIUM PRO DISC 338A: Table of Contents
For the warranty to be valid, the bicycle must be fully assembled by an authorized Argon 18 dealer. High-end components,
particularly carbon parts, need extra care when assembled. These components must be installed using a calibrated torque
wrench to make sure every bolt is at the right torque setting to prevent damage.
My Gallium Pro Disc
Date of purchase:
Retailer:
Size:
Serial Number:

3
Tools needed for assembly
1: Bearing Cup Press (Park Tool HHP-2)
2: Allen Key Set
3: Grease
4: Utility Pick Set (Park Tool Item #UP-SET)
5: Clean Rags
6: Derailleur Hanger Alignment Gauge (Park Tool Item #DAG-2 or #DAG-2.2)
7: Cables and Housing Cutter
8: Carbon Paste
9: Loctite #242
10: Torque Wrench
First Aid Kit: Essential parts to always have on hand
IN CASE OF EMERGENCY…THIS MIGHT SAVE YOUR RIDE!
1: Spare rear derailleur hanger assembly
2: Seat post collar
GALLIUM PRO DISC 338A: 1. Tools Needed and First Aid Kit
80546 80802 80832
(Direct mount option if utilized)

4
GALLIUM PRO DISC 338A: 2. Frameset Inspection
Parts installed on the frame Description Screw Torque Detail
type Nm
Water bottle cage screws Screw (4x) 5 mm 3 Nm Grease
Chain stay cable guide Screw (2x) 3 mm 1.5 Nm Grease
Seat post collar M5 Screw (1x) Socket head 4Nm Grease
Seat post head M5 Screws (2x) Socket head 4.5Nm Grease
Rear derailleur hanger M4 Screw (1x) Flat head 2Nm Loctite
BEFORE ASSEMBLING YOUR NEW GALLIUM PRO DISC, MAKE SURE THAT YOU HAVE ALL THE FOLLOWING:
1. Frameset parts (see p.5-6)
2. All the necessary bolts (refer to Frameset Parts, p.5-6)
WHEN ASSEMBLING YOUR NEW GALLIUM PRO DISC, MAKE SURE YOU FOLLOW THIS PROCEDURE:
3. Inspect the frame for cosmetic aspect (scratches, bumps, cracks, paint defect, etc.)
4. For reference, check serial number and write it on p.2
5. For optimal shifting performance, use a derailleur hanger alignment gauge to make sure that the derailleur hanger is straight (p.11)
IMPORTANT:
The following parts are assembled on the frame. When assembling the bike, you will need to adjust these parts according to their
torque specications.

55
GALLIUM PRO DISC 338A: 3. Frameset Parts
80554
80802 80546
80555
80553
38879
80551
80807
80548
80547
80550
81453
80552
SP.GAPD.338A
5
80549
38446
80812
80813 80832
FK.GAPD.XXS-S.338A
FK.GAPD.M-XL.338A
80805 80804 80811

6
*Except for the frame itself, which is not sold as a spare part, all parts can be ordered by referring to their respective SKU number.
GALLIUM PRO DISC 338A: 4. Parts’ SKUs and Descriptions*
No. Name Assembled on A18 SKU# Qty
Parts already assembled
Parts
- Gallium Pro Disc Fork (XXS/XS/S), 254mm steerer - FK.GAPD.XXS-S.338A
-OR- -OR-
- Gallium Pro Disc Fork (M/L/XL), 302mm steerer - FK.GAPD.M-XL.338A -
- DT Swiss RWS Thru-axle FRONT 12 x 119mm Fork 80812 1
- DT Swiss RWS Thru-axle REAR 12 x 161mm
with removable handle Frame 80813
1
2 Seat Post Collar Frame
80546 1
3 Gallium Pro Disc Seat Post Assembly - SP.GAPD.338A 1
4 Oblong Hydraulic Brake Housing Grommet Frame
80551 2
7 Round Plug Frame
80554 3
9 Headset No.37 + 3D Assembly, with compressor TH-881-1 Fork 81453 1
10 Oblong Plug Frame 80549 2
11 Oblong Grommet Frame 80550 1
12 Bottom Bracket Cover, Electronic Frame 80548 1
13 Round Di2 Grommet for FD Frame 80553 2
14 Internal Di2 Battery Support Seat Post 38446 1 Set
15 Direct Mount Rear Derailleur Hanger Frame 80832 1
16 Long plug Frame 80804 1
17 Long grommet Di2 Frame 80805 1
18 Foam liner Frame 80811 1
- Flat Head Socket Cap Screw - M3 x 0.5 x 10mm LG Frame 80555 2
- Water Bottle Cage Screw - M5 x 16mm LG Frame 80807
4
1 Rear Derailleur Hanger Assembly (incl. Hanger, Dropout, screw) Frame 80802 1
5 Cable Stopper Frame 38879
2
6 Bottom Bracket Cable Guide Frame 80547 1
8 Removable Cable Stopper Frame 80552 1

7
GALLIUM PRO DISC 338A: 4.1. Headset Installation
Install the 3D headset (9) according to
the presst assembly guide. You can
choose from 3 dierent heights: 25mm,
15mm or 0mm.
9
IMPORTANT:
No more than 30mm of spacers can be placed between the
stem and the top cap of the 3D system.
The steerer must be trimmed no more than 5mm above the
stem. The use of more than 5mm of spacers above the stem
could void the eciency of the compressor.
These practices will automatically cancel any warranty
claim against the manufacturer.

8
GALLIUM PRO DISC 338A: 4.2. Seat Post Collar Assembly
Assemble the seat post collar (2) with the seat
post (3). Apply carbon paste inside the frame’s
seat tube and on the seat post where it inserts
inside the frame. Tighten the bolt at 4 Nm.
4Nm
2
CARBON
PASTE
3

9
GALLIUM PRO DISC 338A: 4.3. Seat Post Assembly
The seat post (3) is supplied fully assembled.
It’s equipped with a spring-loaded head for
easy installation of the saddle.
1. Unscrew both bolts slightly until the top
clamp (a) and the cradle (b) are separated
enough to insert the saddle rail. Do not
unscrew the bolts completely.
2. Screw both bolts in order to adjust the
angle of the saddle and clamp the rail.
3. Tighten bolts at 4.5Nm.
a
b
4,5 Nm
3

10
GALLIUM PRO DISC 338A: 4.3. Seat Post Assembly
The top clamp (a) and the cradle (b)
can be ipped to change the saddle
oset between 15 or 25mm.
25mm oset 15mm oset
a a
b b

11
GALLIUM PRO DISC 338A: 4.4. Rear Derailleur Hanger Adjustment
1. Select the correct rear derailleur hanger depending on the type of derailleur
that you have.
- Direct mount (15)
- Regular mount (1)
2. Make sure to align the rear derailleur hanger.
3. Use Derailleur Hanger Alignment Gauge like Park Tool Item #DAG-2.
For any assistance, visit Park Tool’s website:
www.parktool.com/product/derailleur-hanger-alignment-gauge-dag-2
15
1

12
Start installation at this end.
Insert derailleur cables with hoses using plastic
Cable Stopper (5).
Insert hydraulic brake hose as shown, using the
Oblong Cable Guide (4).
BR = Brake Hose
DC = Derailleur Cable (mech.)
DH = Derailleur Housing (mech.)
BR
DC+DH
DC+DH
GALLIUM PRO DISC 338A: 4.5. Mechanical groupset specication
4
5

13
GALLIUM PRO DISC 338A: 4.5. Mechanical groupset specication
Exit derailleur cables through bottom bracket (BB) hole.
Insert in the appropriate slots in the BB guide (6).
Making sure the pipe is aligned with the top hole,
insert BB guide in the square hole until it clicks.
Plug the FD Hange hole with the Round Plug (7).
DC
DC = Derailleur Cable (mech.)
DC
6
6
7

14
DC
BR = Brake Hose
DC = Derailleur Cable (mech.)
DH = Derailleur Housing (mech.)
DC+DH
BR
Exit the hydraulic brake hose through
the hole on the chain stay.
GALLIUM PRO DISC 338A: 4.5. Mechanical groupset specication
16
8
4

15
GALLIUM PRO DISC 338A: 4.6. Electronic (Di2) groupset specication
BR = Brake Hose
EW = Electronic Wire
EW
BR
Start installation at this end.
Insert electronic wire and hydraulic
brake hose as shown with the
use of the Oblong Cable Guide
(4), Oblong Plug (9) and Oblong
Grommet (10).
4
10
9

16
Use the square hole to connect all the wires
to the junction box.
Insert the junction box in the hole.
Insert the BB cover (11) in the square hole until it clicks.
Use the Round Grommet (12) to secure the Di2 cable in
the FD hole.
Plus the hole near the BB with the Round Plug (7).
EW
EW = Electronic Wire
GALLIUM PRO DISC 338A: 4.6. Electronic (Di2) groupset specication
11
12
7

17
BR
Exit the hydraulic brake hose through
the hole on the chain stay.
BR = Brake Hose
EW = Electronic Wire
EW
GALLIUM PRO DISC 338A: 4.6. Electronic (Di2) groupset specication
17
4

18
The Di2 battery is hidden in the
seatpost; use the Di2 battery holder
(13) to x the battery correctly. Apply a
slight amount of grease on both parts.
GREASE
GALLIUM PRO DISC 338A: 4.6. Electronic (Di2) groupset specication
13

19
Start installation at this end.
Insert hydraulic brake hose
shown with the use of the Oblong
Cable Guide (4) and Oblong Plugs (9).
BR = Brake Hose
BR
GALLIUM PRO DISC 338A: 4.7. Electronic (Wireless) groupset specication
4
9

20
Use the square hole to connect all the wires
to the junction box.
Insert the junction box in the hole.
Insert the BB cover (11) in the square hole until it clicks.
Use the Round Plugs (7) to plug holes near the FD
hanger and BB.
GALLIUM PRO DISC 338A: 4.7. Electronic (Wireless) groupset specication
11
7