8
NITROGEN DISC 286A: 4.1. Headset Installation
25mm
15mm
0mm
setup
setup
setup
5
3
4
1
1
1
5
3
4
5
3
4
5
6
7
2
6
2
7
8
6
5
5
Compressor
Top cap (including O-ring & seal)
Micro spacers
Compression ring
Bearing
3D bearing holder
Plastic sleeve (no need for 0mm setup)
Top cap for 0mm setup
1
2
3
4
5
6
7
8
head tube
(bike)
head tube
(bike)
head tube
(bike)
To remove the 3D bearing holder, insert the Park Tool
RT-1 and then tap it carefully until the spacer comes out.
1
STEP
Inspect the bike’s head tube for any sharp edges and
apply a small amount of grease.
2
STEP
For the 25mm and 15mm setups, lightly grease the
bottom section of the 3D bearing holder (6) and insert
the plastic sleeve (7).
3
STEP
Position the headset inside the head tube. Place
the top 3D assembly with the headset bearing inside
(this will prevent the sleeve from getting damaged).
Add the compression ring on top of the bearing, then
add the press fit 3D system tool and softly press down
the assembly until it bottoms out using a Bearing Cup
Press (Park Tool HHP-2). Then, insert the bottom
bearing (5), compression ring (4) micro spacers (3) and
top cap (2), slide the fork and stem and measure the
steerer length needed.
For the 0mm setup , do not use the plastic sleeve.
Install the 3D bearing holder (6) with grease applied
directly inside the frame.
4
STEP
First, you must assess which
setup
suits your needs:
25mm, 15mm or 0mm.