Eightpins Ngs2 User manual

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EIGHTPINS

Installation Guide and Manual

Eightpins NGS2

Integrated variable seatpost

V1 15.05.2019

NGS2.0

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Inhalt

3 General

3 Warranty Policy

3 Service

5 Safety instructions

5 Assembly and service

5 Modiﬁ cations

5 Before the assembly

6 Part description

7 Compatibilities

9 Installation

19 Manual

21 Manual adjustments

26 Service

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General

Thank you for equipping your bike with an Eightpins variable seatpost, a highstandardized, highly technical product for mountain bikes. There is a

variety of points to take into consideration assembling and using the seatpost. As a result of the integration of the seatpost, it is designed entirely dif-

ferent in comparison to other variable seatposts. The adjustment of the seat height as well as the adjustment of the travel of the seatpost is realized

with one single tube. The mechanics for this is directly connected with the frame via the Postpin axle that absorbs all axial forces. The lateral forces

are absorbed by the bushing tubes and thus by the frame. It is therefore crucial to mind the maximal extension as well as the minimum insert length.

Attention! If assembled or used in a wrong way, you may hurt yourself as well as damage the frame or

the seatpost.

Make sure all adjustment elements are in place at all times and that the tension of the cable is adjusted correctly. In case you do not have the skills

to assemble the seatpost, please refer to your local bike dealer or the service center in your country.

Attention! Read the following assembly information and manual carefully and stepby-step and mount

the Eightpins seatpost only according to the instructions.

Warranty Policy

We offer a two-years warranty for your seatpost beginning at the date of purchase. The warranty exclusively includes the repair or exchange of the

components damaged. In order to claim a warranty case, the receipt is obligatory. Common wear, usual services and wrong assemblies are not

covered by the warranty. If the seatpost has been altered in any way, the warranty automatically expires; the rider is responsible for any damages

caused by any alteration of the seatpost.

Service

As to the service, a major advantage of the Eightpins variable seatpost is that the main tube can be dismounted very easily and that the anti-fricti-

on bushing can be cleaned and/ or exchanged quickly. In case you notice a higher friction in the system, it can be greased via a grease ort in the

outer sleeve. With the right tools and a basic technical understanding, you may service the seatpost yourself including cleaning and greasing the

bushings, pumping up the system, readjusting the tension of the overload clutch and exchanging the cable.

In general, not much servicing is required. The locking mechanism does not wear out. In case the gas pressure spring loses pressure, it is to be

sent to us or brought to a local service center, as the sealing needs to be exchanged.

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The following service activities have to be done regularly.

Before every

ride

Every 20 opera-

ting hours

Every 40 opera-

ting hours

Every 100 operating

hours

Every 200 opera-

ting hours

Remove dried dirt with

water and mild soap x

Cleaning the wiper x

Cleaning the bushing

tube x

Exchange the bushing

tube x

Exchange the wiper x

Exchange the Felt ring x

Sealing service of the gas

spring x

Oil reﬁ ll x

For services of all kinds, please refer to your local bike workshop or to Lupaan GmbH:

Lupaan GmbH „EIGHTPINS“

Kristein 2

4470 Enns

www.eightpins.at

+43 660 8107143

[email protected]

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Attention! Do not service the mechanics or the gas pressure spring yourself as the system is under

high pressure and as one may risk severe injuries.

Safety instructions

Usage as intended

The Eightpins variable seatpost is designed for bicycle frames featuring a Postpin interface. The range of application includes touring bikes, trekking

bikes and mountain bikes. Bicycle frames that do not have this feature should not be modiﬁ ed. The Eightpins variable seatpost must only be assem-

bled and combined with the original Eightpins remote lever. Different leverage ratios can cause irreparable damages.

Assembly and service

The assembly and the service of the Eightpins variable seatpost requires a special understanding of technical matters. Do not overestimate your

own skills but refer to a professional bicycle shop or to an authorized Eightpins service partner at all times. This is the only way a correct service can

be guaranteed.

Modiﬁ cations

The Eightpins variable seatpost is not to be altered in any way. Do not dismount it, sand it down or paint it. Always use a torque wrench where

necessary. Read the manual carefully and follow it step-by-step.

Attention: A seatpost that has not been mounted correctly does not work correctly.This may lead to

crashes and injuries. Besides, the frame can be damaged.

Before the assembly

The post-pin mounting interface in the frame contains an adjustment screw on the right side of the frame for vertical alignment of the seatpost.

This screw is already set at the factory and glued with a detachable screw glue.

If the adjusting screw is not included in the frame or adjusted correctly, contact the frame supplier.

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B ( 1:1)

Part description

1 Eightpins Maintube

2 Eightpins Cartridge

3 Bushing

4 Outer sleeve

5 Fixing screw

6 Lubrication port

7 Flex aluminium cable housing

8 Remote lever

9 Cable clamping nut

10 Inline cable adjuster

11 End cap small

12 Special end cap or FlexChain

13 Valve adapter

14 Cable: Eightpins or Campagnolo

15 Postpin axle

16 Seat angle adjuster

17 Height adjuster

18 Seat clamp top

19 Seat clamp bottom

20 Release slider

21 Guiding inserts

22 Height adjusting clamp

23 Mounting interface

24 Adjusting ring

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Compatibilities

The integrated Eightpins variable seatpost is exclusively designed for frames with a Postpin interface. One can not retroﬁ t this interface to a bicycle

frame. Refer to your local bike shop in case you are in doubt.

Attention: Eightpins decisively advices its customers not to modify a frame in any way, as this can weaken the

frame, cause crashes and lead to severe injuries including death.

Eightpin‘s seatposts are divided into two different size schemes. There is a size scheme with 4 sizes: S, M, L and XL and a size scheme with 6

sizes: XS, S, M, L, XL, XXL. The size to use depends entirely on the frame size.

Use only Eightpins cartridges of the correct size for the appropriate frame size. (Example: 6X-L cartridge ﬁ ts into a frame with 6-fold size scheme

with the size L)

The bushing tube length is selected so that it corresponds to the minimum insertion depth of the seattube in the frame. All bending forces are trans-

ferred to the frame via the bushing tube. When assembling or exchanging the bushing tube, the correct length must be used.

The respective length can be found in the table under the column bushing tube.

It is also important to pay attention to the compatibility of the seatpost tube lengths. The table contains all possible combi-

nations. The corresponding adjustment ranges can also be found in the table. The values refer to the distance between the

bottom bracket and the upper edge of the saddle. Included is a saddle with a height of 4cm.

ATTENTION! Only the intended and compatible seat post sizes, strokes and bushing tube

lengths speciﬁ ed by the bike manufacturer may be used.

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Installation

Frame/seattube

Cable housing / bowden insallation

Install the cable housing in the frame before installing the seat post. Please follow the instructions of the frame manufacturer. The cable housing is

to be inserted into the seat tube until about 2 cm of it reach out of it. The second end of the housing – at the top of the frame – is to be cut depen-

ding on the frame size. The cable housing is pushed further out of the frame during assembly of the seat post by the length X. Observe the following

table when cutting the cable housing and shorten it to the desired length.

The frame must have a 5mm hole at the top of the seat tube to mount and ﬁ x the outer sleeve. If this hole does not

exist, refer to the manual of the frame supplier to ﬁ nd out how to drill this hole in the seat tube of the frame.

ca. 20mm

Länge X

length X

Länge X

length X

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Endcap

Installation of the seatpost

There are two different types of end caps which can be ﬁ tted to the end of the outer cable at the seattube side. Left

picture shows the special end cap of Eightpins. This is mainly used in non-e-bikes. The right picture shows the Lukon

Flex chain end cap version which is mainly used for e-bikes. This ersion allows a cable routing with very narrow radius

around the interface. This is needed if the space between electric motor and seat post is tight and limited.

Insert the cable into the ca-

ble housing until it reaches

out of it again at the top of

the frame.

Push the bushing tube

and the outer sleeve to the

lower end of the seatpost.

Hang the cable housing on

the cable housing coun-

terpart at the Postpin moun-

ting unit at the lower end of

the Eightpins

capsule.

Tension the cable at the

front end of the cable

housing and carefully insert

the seatpost into the seat

tube of the

frame.

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we The bushing must be carefully inserted into the frame.

Attention! If mounting in aluminum frames with non-anodised inner walls, lubricate the

bushing tube with grease before installation.

Attention! When mounting in carbon frames, never treat parts with friction paste

Carefully press the outer sleeve onto the seat tube by hand. Press on until the outer sleeve hits the stop.

While pushing the seatpost downwards, pull the cable in order to have it under slight

pressure at all times and that the outer cable does not slip out of the postpin interface

socket.

Insert the seatpost until you can see the Postpin mounting unit through the hole of

the Postpin interface. You must be able to fully see the slot of the mounting interface

through the hole. Insert the Postpin axle into the postpin hole of the postpin interface

and tighten it loosely with a 5mm hex key.

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Tighten the postpin

with a torque wrench with

8 Nm.

Rotate the outer sleeve by

rotation so that the moun-

ting hole of the outer sleeve

coincides with the mounting

hole on the frame.

Screw the M5 mounting

screw of the outer sleeve

into the outer sleeve with a

3mm Allen key.

Attention! The screw must be easy to screw into the outer sleeve. If this is not the case, perhaps the hole in the

frame does not coincide with the mounting hole of the outer sleeve. The frame can be squeezed or damaged

Assembly of the remote lever

The cable system of the Eightpins seatpost consists of a common cable housing with a Steel core and a short, more ﬂ exible cable housing with

an Aluminum core directly at the remote lever. The cable system right at the remote lever consists of a 10 cm Aluminum cable housing, a speciﬁ c

cable tension adjusetr and a speciﬁ c end cap for the remote lever featuring a reduced outer diameter. The speciﬁ c end cap is installed at the one

end of the cable housing, the cable tension adjuster at the other end. The cable tension adjuster is installed so that the side with the 4 mm label is

connected with the Aluminum cable housing. The second end is attached to the steel cable housing that reaches out of the frame..

Note: Initially, put the cable tension adjuster into the minimum cable length position.

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Install the remote lever between the grip and the brake lever and tighten its screw with 2.5 Nm.

Note: The lever can be used with 2-speed drivetrain gear levers and without. Make sure the Eightpins

remote lever does not interfere with the gear lever. Further turn it upwards, in order to avoid this.

Before the cable is attached to it, pull it ﬁ rmly until the click mechanics is fully open. You can hear a slight click from

the inside of the seat tube. When releasing again, you will hear another click. This process is important to conﬁ rm

that all components of the cable system sit tightly.

cable housing

bowden cable

cable adjuster

ex aluminium

cable housing

end cap small

clamping nut

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If the cable housing can be pushed into the frame in any way during the check, it has been detached from the cable

housing counterpart at the Postpin mounting unit. Take out the seatpost and attach the outer sleeve in the counter

part of the mounting interface

Pull the cable clamp of the

remote lever over the cable

and guide it all the way to

the cable housing.

Very slightly tighten its

screw with a 3mm Allen key

on both sides so it can still.

be moved. Position it about

2mm away from the cable

housing.

Cut the cable directly at the

cable clamp. Pull it away

from the cable housing a

little bit in order to have

the end of the cable itself

disappear within it.

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Attention! In order to avoid injuries, the cable needs to be pulled into the cable clamp hiding any type of cable bits

sticking out of it.

3mm

The distance between cab-

le clamp and cable housing

should still not exceed 3

mm.

Tighten the two screws of

the cable clamp simul-

taneously with a torque

wrench with 5 Nm.

5mm

Hold the Aluminum cable

housing with your hand.

With the other hand, pull

the cable in order to open

the click mechanism.

With this pretension, ﬁ rst

hang the Aluminum cable

housing with the end cap

on the remote lever.

In the last step, the end

cap can be hanged on the

remote lever.

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Press the lever in order to

control the function of the

mechanics.

If the tension is too low, you

will feel a low resistance at

ﬁ rst before you then feel a

higher one.

Adjust the cable tension

with the cable tension ad-

juster in order to minimize

the free travel.

The cable tension is adjusted correctly

if you feel the higher resistance at the

last 2 to 3 mm pushing the lever. If the

tension is too high, the click mechanics

does not open and the seatpost can not

be ﬁ xated.

If the tension is too high, the click mechanics does not open and the seatpost can not be ﬁ xated. In that case loosen the cable

tension again until the locking mechanic works again.

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Mounting the saddle

Attention: The back screw of the seat post head must not be tightened with more than

8 Nm, as it might break and lead to an increased risk of injury.

Loosen and remove the

rear screw of the saddle

clamp.

With the front screw, adjust the saddle angle. Turning it clockwise, the tip

of the saddle moves upwards; turning it anticlockwise, the tip of the saddle

moves downwards.

With an 5mm bit and a torque wrench, tighten the rear screw with 8 Nm.

Note: Altering the saddle angle, you always need to loosen the

rear screw ﬁ rst.

With the saddle angle ad-

justment screw, loosen the

front screw.

Insert the top saddle plate

and position it over the

saddle rails.

Have the saddle lay on

the sockets for the saddle

rails and insert the back

screw for the saddle ﬁ xation

again.

ATTENTION: The nuts

which are installed

in the top seatclamp

have two small ﬂ at

areas which have to

be aligned in the long

hole parallel to the

riding direction.

ATTENTION: If the nut

are not aligned cor-

rectly and the screws

get tightened, the nuts

getdamaged and can´t

move anymore. This

can cause a crack of

the screws. High risk

of injury!

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Saddle angle

Alignment of the saddle

The Eightpins NGS2 seatpost has a overload clutch which gives way in case of a fall and lets the saddle turn sideways. This is only

roughly set in the assembly. If, after assembly, the saddle is slightly to the side, it can be easily turned to the desired position. The

required force is about 45Nm.

With an 5mm bit and a torque wrench, tighten the rear screw with 8 Nm.

Attention: The back screw of the seat post head must not be tightened with more than 8 Nm,

as it might break and lead to an increased risk of injury.

With the front screw, adjust the saddle angle. Turning it clockwise, the tip of the saddle moves upwards; turning it anti-

clockwise, the tip of the saddle moves downwards.

Loosen the rear ﬁ xing screw on the seat post head with a 5 mm Allen key.

Note! To change the saddle angle, ﬁ rst loosen the rear saddle clamp screw in order to be able to

adjust the saddle with the saddle angle adjuster.

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Manual

Using the seatpost

In order to lower the seatpost, push the remote lever at the handlebar and push down the seatpost. In order to keep the new saddle position,

release the remote lever. Extending the seatpost again, you need to push the remote lever and without counterforce let it ﬁ nd its original height. The

Eightpins variable seatpost works fully mechanically and features click notches every 6 mm.

Attention: The remote lever must not be pushed if the bike hangs on the saddle.

Aligning the seatpost / Operating the overload clutch

The Eightpins seatpost features an overload rotation clutch. This allows for the seatpost to turn away in case of a crash and thus prevents both the

saddle and the seatpost from damages. If this has happened, the saddle can simply be brought back into place by turning it. If the breakaway force

is too low, it can be increased (refer to the chapter “Service”).

Attention: the saddle can be turned to the left or right with a maximum angle of 90°. If it is turned

further, it will be damaged severely.!

90Grad über 90Grad

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Seat height adjustment top position

Refer to the chapter “Seat height adjustment”.

Adjustment of the saddle angle

Refer to the chapter “Installation of the saddle”.

Before every single ride

Check the following functions of the seatpost before every ride:

- In both rotation directions, there should be no play noticeable.

- The seatpost should not have more play than 2 – 3 mm to the front or back. If the clearance is bigger, check the minimum insert length and

whether the bushing tube is ok (also refer to the chapter “Service”).

- The saddle must not have any play, the back screw is to be tightened with 8 Nm

- The mechanics to lower the seatpost has to run smoothly and without friction. In case you notice friction, the bushing tube has to be greased (see

chapter service). If the lubrication of the seatpost does not improve, there may be an adjustment error of the adjusting ring in the frame. Other rea-