BMC Trailsync User manual

Trailsync
Seatpost Cut Instructions
V2-07.2018

Trailsync
Seatpost Cut Instructions
Contents
1. General Note 3
2. Step by Step instructions 5
TRAILSYNC – Seatheight Manual

1. General Note
Standard
Trailsync Head
Long
Trailsync Head
This manual provides specific
instructions on how cut the
Trailsync seatpost’s main tube,
if necessary.
A longer head is available as a
replacement part, which extends
the adjustment range by 30mm.
TRAILSYNC – Seatheight Manual

Tools necessary:
Work Stand: Shock Pump:
Allen Keys:
Torque Wrench:
Tube Cutter:
Clean Rags:
Deburring Tool
or File:
10 –15 Minutes
TRAILSYNC – Seatheight Manual

1
3
2
4 5
1 Loosen the M5 screw on the
seatpost head.
2 Remove the seatpost head,
together with the saddle,
from the tube.
2. Step by Step instructions
3 Remove the valve cover.
4 Using a small tool, release all air.
5 Loosen the bolts.
Attention:
Be sure to release all air from
the air chamber!
TRAILSYNC – Seatheight Manual

66 Mount the frame on a bike stand.
Ensure the frame is held in a
stable position.
Attention:
Do not clamp the carbon
frame!
Take note of the frame size
and the saddle height, the
measurement should be taken
from center of BB to top of
the saddle (middle point):
In the next page cutting in-
structions are provided
based on saddle height and
frame size.
TRAILSYNC – Seatheight Manual

Cut Line Small
27.5”
Small
29”
Medium
27.5”
Medium
29”
Large
29”
XLarge
29”
0max 760 770 780 790 835 855
0min 725 735 74 5 755 800 820
1max 750 760 770 780 825 845
1min 715 725 735 745 790 810
2max 740 750 760 770 815 835
2min 705 715 725 735 780 800
3max 730 740 750 760 805 825
3min 695 705 715 725 770 790
4max 720 730 740 750 795 815
4min 685 695 705 715 760 780
5max 710 720 730 740 785 805
5min 675 685 695 705 750 770
6max 700 710 720 730
6min 665 675 685 695
7max 690 700 710 720
7min 655 665 675 685
8max 680 690
8min 645 655
9max 670 680
9min 635 645
Choose your frame size and your
desired seat height (center of B/B
to top of Saddle).
On the left side of the table you will
find the matching cut position.
based on 45mm saddle
height (thickness)
Standard Head (35mm adjusment range)
Trailsync Seat Height Calculation
Example:
for a frame size 29” Medium,
a saddle height of 740mm
would have to be cut on cut
line 2.
TRAILSYNC – Seatheight Manual

Cut Line Small
27.5”
Small
29”
Medium
27.5”
Medium
29”
Large
29”
XLarge
29”
0max 790 800 810 820 865 885
0min 725 735 74 5 755 800 820
1max 780 790 800 810 855 875
1min 715 725 735 745 790 810
2max 770 780 790 800 845 865
2min 705 715 725 735 780 800
3max 760 770 780 790
3min 695 705 715 725
4max 750 760 770 780
4min 685 695 705 715
5max 740 750
5min 675 685
6max 730 740
6min 665 675
Long Head (65mm adjusment range)
Trailsync Seat Height Calculation
based on 45mm saddle
height (thickness)
TRAILSYNC – Seatheight Manual

7 8
7 Push the valve inwards to pro-
tect it while cutting the tube.
8 Place it slightly deeper than
the cut line you have chosen.
TRAILSYNC – Seatheight Manual

910 9 Be sure to cut at the correct cut
line.
10 Use a proper tube cutter or saw
to cut the tube.
Attention:
Do not cut further than the
max. cut line as indicated in
the picture!
TRAILSYNC – Seatheight Manual

11
12
11 Remove the sharp edges
(burr) using a deburring tool
or a file.
12 Clean the tube.
Attention:
Ensure that the inner and
outer edges are very clean!
TRAILSYNC – Seatheight Manual

13 14
15
13 Position the valve flush with the
tube.
14 We recommend using a shock
pump to place the valve flush with
the tube as shown in the picture
right.
15 Tighten the bolts, alternating step
by step, to 2.5 Nm
Attention:
Ensure screws are
tightened to 2.5 Nm.
TRAILSYNC – Seatheight Manual

16
18
17
19
16 Fill the air chamber with 150psi.
17 Replace the valve cover.
18 Re-assemble the saddle head
and set the seat height.
19 Align the saddle and tighten
the seatpost head with the
recommended torque.
Attention:
max. pressure is 180psi!
TRAILSYNC – Seatheight Manual