THM Fibula Instruction Book

INSTRUCTION BOOK

THMFIBULA

THM Fibula_SE_1_en,2017-05

thm.bike

LOREM IPSUM

LOREM IPSUM

CONTENT

Please bear in mind that your THM component is a lightweight construction manufactured
from carbon – take this into account for assembly/maintenance work and when handling the
product and proceed with caution!

The THM-Fibula racing brake can be used with all common brake levers that exhibit a leverage
ratio of 2:1 and above (brake lever travel : inner brake cable travel).

INTRODUCTION

Preface................................................................4

SAFETY

Intended use ..................................................... 5

Fundamental safety precautions ..............5

Asssembly & maintenance ..........................5

On the road ...................................................... 6

Transport & storage .......................................6

TECHNICAL SPECIFICATIONS

Delivery specications ..................................7

Dimensions ........................................................8

Tightening Torques ........................................8

ASSEMBLY

Fibula assembly ............................................... 9

Installing the brake shoes ............................9

Assembling the brake blocks .....................10

Rim width assembly..................................... 12

Assembling the brake cables .....................13

Adjusting the brake shoes .........................15

Brake aligning ...............................................16

Adjusting cable tension .............................. 16

Chainging the Fibula spring ........................17

MAINTENANCE

Important maintenance information ..... 18

Disposal .......................................................... 19

Opening the brake blocks ........................... 19

Before every journey .................................. 20

Regular maintenance ................................... 21

THMFIBULA

WARRANTY

Materials defec tliability .............................23

Warranty ...........................................................23

THMFIBULA

INTRODUCTION

SAFETY

Preface

This manual is an integral part of your THM component and it provides you with information
regarding the safe operation of your THM-Fibula racing brakes.

Carefully read this manual prior to assembling your THM components. Always read and observe
all of the assembly and maintenance instructions in this manual, as well as those provided in the
manuals of other manufacturers whose products are used on your bicycle (brake levers, cable
system, frame, fork, wheels etc.).

WARNING

Non-observance of the information contained in this manual could result in an accident and death
or serious injury.

You will encounter the following symbols and references in this manual:

The index nger instructs you to perform a particular

action.

The arrow indicates the consequence of your action.

WARNING

This safety message indicates a hazardous situation which,
if not avoided, could result in death or serious injury.

CAUTION

This safety message indicates a hazardous situation which,
if not avoided, could result in minor or moderate injury.

NOTICE

This message warns of a risk of material damage.

This refers to additional information or tips.

Retain this manual for other users of your THM components. Make sure that all users read,
understand and observe this manual.

If you ever sell or give away your THM components, this manual should be transferred to the new
owner.

Intended use

WARNING

Any use diering from that intended could cause an accident and result in death or serious injury.

THM-Fibula racing brakes have been exclusively designed

- for installation on standard race- and time trial bikes.

- for combination with standard wheel rims that have a corresponding braking ank.

- for combination with common brake levers that have a leverage ratio of 2:1 and above.

- for use on a paved or tarred surfaces (streets/roads).

Fundamental safety precautions

Always remember that riding a bicycle involves potential danger for the rider and other road users,
as well as for the bicycle and its components.

Even if protective equipment and safety devices are used, accidents resulting in death or serious
injury can still occur.

You should therefore use your common sense and avoid any unreasonable behaviour!

ASSSEMBLY & MAINTENANCE

WARNING

Risk of accident caused by assembly and maintenance work which has not been conducted in a
professional manner.

- Do not overestimate your technical ability. All assembly and maintenance work should be
performed by a specialist workshop for bicycles. This is the only way to ensure the work is
conducted in a professional manner.

- Always observe all of the specied tightening torques for the screw connections.

- Only ever use original THM components which are available from your specialist dealer or directly
from THM.

- Never make any modications to your THM components.

- Check your brakes (brake block, lever, cables and pads) to make sure they are undamaged and
functioning properly every time you use your bike. Send us your THM-Fibula racing brakes before
further use if damage is visible (cracks, fractures, deformations, etc.) or if you are in any doubt
about their functionality.

- Check your THM components before each journey to ensure the surfaces are completely
undamaged. Send us your THM components for inspection before further use if damage is visible
(deep scratches in the paintwork which extend into the carbon structure, large abrasions, etc.), or
if you are in any doubt about their functionality.

- Always ensure your bicycle is maintained in a awless condition. Care and maintenance will

prolong the service life of your bicycle and its components and also improve your personal safety.

We hope you get a lot of joy from your THM components!
Your THM-Carbones Team

THMFIBULA THMFIBULA

4

5

SAFETY

TECHNICAL SPECIFICATIONS

ON THE ROAD

WARNING

Risk of accident caused by malfunctioning brakes.

- Before starting out familiarise yourself with the braking performance of the THM-Fibula racing
brakes on a quiet and clear stretch of road.

- Always brake by actuating both brakes simultaneously.

- Familiarise yourself with the increased braking distances required in wet conditions on a quiet
and clear stretch of road.

Risk of accident caused by erratic riding behaviour or improper equipment.

- Always ride with foresight, attention and a readiness to brake.

- Adjust your speed to the prevailing conditions (trac, weather, visibility, etc.).

- Do not use your THM-Fibula racing brakes at ambient temperatures below -10°C (14 °F).

- Do not exceed the maximum rider weight for which your THM components have been approved
– see Dimensions, page 8.

- Do not perform jumps with your bicycle as this generates an enormous amount of force.

- Always comply with the trac regulations that are in force in the country where you are using

your bicycle.

- When riding your bicycle you should always wear a high quality cycling helmet (e.g. ANSI

certied) that is in excellent condition. Your clothing should be close-tting but not restrictive.

- Only ride your bicycle if you are in good physical condition and your bicycle and all of its

components are operating in a awless manner.

- If you are involved in a heavy fall you should not continue to ride your bicycle.
If such a case occurs, send us your THM components for inspection, even if no external damage
is visible. In your own interest you should treat all of the components on your bicycle which have
been produced by other manufacturers in the same manner.

TRANSPORT & STORAGE

WARNING

Risk of accident caused by damaged bicycle components.

- Always transport your bicycle in an appropriate and careful manner.

- Do not store your THM components at an ambient temperature below -15°C (5°F) or above 55°C
(131°F).

Risk of accident.

- Do not allow children to play with your bicycle.

Delivery specications

1

2

3

4

7

8

5 6

9

1 Cable adjuster (x2)

2 Brake block, front

3 Sleeve nut, front – short (20.0mm (0.8in))

4 Sleeve nut, front – long (29.5mm (1.2in))

5 Brake block, rear

6 Sleeve nut, rear (12.5mm (0.5in))

7 Brake shoe bolt (×4)

8 Spherical cap ring (×8)

9 Brake shoe (×4)

Instruction book

THMFIBULA THMFIBULA

6

7

TECHNICAL SPECIFICATIONS

ASSEMBLY

Dimensions

C

B

A

A B C Weight* Total weight**

mm(in) g (oz ) kg (lb), max.

Brake, front

43 ±5

Brake, rear 12.0-15.0

* Technical specications, dimensions and weights are to be understood with the corresponding tolerances and can
dier slightly from your THM components.

** Total weight = rider + bicycle + baggage

29.0-49.0
Internal-Ø 5 60 (2.1) 120 (265)

Fibula assembly

WARNING

If not properly performed, assembly and maintenance work could cause accidents resulting in
death or serious injury.

- Do not overestimate your technical ability. All assembly and maintenance work should be
performed by a specialist workshop for bicycles. This is the only way to ensure the work is
conducted in a professional manner.

40,20

Requirements for correct installation and adjustment of the
THM-Fibula racing brakes are:

- An intact brake cable system with new inner brake cables.

- Brake cable outer sheaths and end pieces with an external

13 mm min.

diameter of max. 5mm (0.2in). -Shimano® brake pads.

- Precisely centred wheels (max. 0.2mm (0.01in) later­ al / max. 1mm (0.04in) radial run-out).

- Wheels mounted at the exact centre of the frame and fork.

- Suitable tire dimensions - min. 13 mm (0.52 in) gap between

the tire and brake bolt axis (g. 1).

1

INSTALLING THE BRAKE SHOES

2

WARNING

Risk of accident caused by an insucient braking eect or

erratic braking as a result of inappropriate brake pads.

- Only ever use those brake pads which have been
approved by your wheel manufacturer.

Tightening Torques

WARNING

Risk of accident caused by malfunctioning or locking brakes due to loose screw connections.

- Check the required tightening torque of all screw connections after the rst 500 km (310miles)

– retighten the connections if necessary.

N·m (lbf ·in)

min. – max.

Sleeve nut 10–12 (89–106) with thread lock

Brake cable clamping screw

Eccentric clamping screw 1 - 1,5 (9 - 13)

3–5 (27–44)

dryBrake shoe bolt

1

2

8

Make sure all brake pads are correctly installed as
follows:

The arrow (FORWARD) should be facing the direction
of travel (to the front).

Brake pads marked with a LEFT inscription should be
installed in the left-hand brake shoe (1).

Brake pads marked with a RIGHT inscription should
be installed in the right-hand brake shoe(2).

Insert the brake pads into the corresponding brake
shoes.

(g. 2)

9THMFIBULA THMFIBULA

ASSEMBLY

ASSEMBLY

WARNING

Risk of accident caused by malfunctioning or locking brakes
due to improper brake shoe assembly.

- Make sure the brake shoes are correctly installed on the
brake blocks.

- Make sure that all spherical cap rings are tted with their
at side facing the brake blocks.

Assemble the brake shoes to the brake blocks by using

3

3

2 spherical cap rings (3) for each shoe.

(g. 3)

Only tighten the brake shoe bolts (4) lightly to begin
with.

(g. 4)

The following installation and adjusting steps are the same

for both the front and rear brake blocks and for dierent rim

types.

We have, however, restricted the illustrations used for the
individual steps to

- the front brake block.

- a clincher rim without tyre.

Assemble the brake block.

Align the brake block so that it is as straight as possible.

Only tighten the sleeve nut slightly to begin with.

(g. 6)

18 mm max.

6 mm min.

4

6

4

ASSEMBLING BRAKE BLOCKS

2

1

5

Determine the correct sleeve nut (1) for your front brake
block.

The sleeve nut must be able to be screwed onto the
thread of the brake bolt through at least 6 rotations
(6mm (0.24in)).

WARNING

Risk of accident as a result of sudden fork breakage due to

carbon bres being damaged through improper assembly.

- Make sure the head of the sleeve nut is seated against
the front shoulder (2) of the fork head hole.

(g. 5)

Do not use any thread lock for the time being!

4 4

7

Loosen the brake shoe bolts.

Press the brake blocks together rmly.

Make sure the entire surface of the brake pad has
full contact with the braking rim.

Only tighten the brake shoe bolts (4) lightly to begin
with.

(g. 7)

10

11THMFIBULA THMFIBULA

ASSEMBLY

7

ASSEMBLY

1

Position 1

19-25 mm

Position 2

RIM WIDTH ASSEMBLY

The Fibula is made for two ranges of rim width. (g. 9, 10)

To change the range of use proceed as follows:

Loosen the clamping screw (1) using a 2 mm Allen key.

Do not turn the screw completely out of the eccentric.

Turn the eccentric wheel in your desired position
against the stop.

Tighten the clamping screw (1) with a torque of ca. 1 Nm

8

(9 lbf·in).

9

(g. 8)

ASSEMBLING THE BRAKE CABLES

5

Pull both parts of the adjuster together.

Then unscrew the nut (5) on the adjuster through
approximately 2 rotations.

(g. 11)

If necessary, remove your old inner brake cables.

11

6

Insert the adjuster (6) into its seating.

Press the brake blocks together rmly.

When the brake block is in this position make sure
that the outer sheath of your brake cable is neither too
short nor too long, and that it can be installed correctly.

Adjust the outer sheath of your brake cable if necessary.

(g. 12)

12

Install the new inner brake cable (7).

(g. 13)

25-28 mm

10

13

12 1 3 THMFIBULA THMFIBULA

ASSEMBLY

ASSEMBLY

9

15 mm

Press the brake blocks together rmly.

Apply tension to the inner brake cable.

Hold the brake block and inner brake cable in this
position.

(g. 14)

1

14

Tighten the rear clamping screw (8) to prevent the inner
brake cable from slipping out when the brake block is
released.

(g. 15)

8

15

Shorten the end of the inner brake cable by
approximately 15 mm.

Ax a suitable ferrule to the end of the inner brake
cable or solder it.

This will prevent the end of the inner brake cable from
splaying.

Insert an Allen key into the the rear clamping screw (8)
and tighten the front clamping screw (9) using a torque
of 3N·m(27lbf·in).

16

(g. 16)

ADJUSTING THE BRAKE SHOES

Actuate the brake lever slightly and hold it during the
following steps.

Loosen the brake shoe bolts (1).

Adjust the brake shoes so that the brake pads are
located exactly in line with the braking rim (2).

Make sure the entire surface of the brake pad has
full contact with the braking rim.

2

WARNING

Risk of accident caused by punctured tyres or locking 15

17

wheels due to incorrect brake shoe adjustment.

- Make sure that the brake pads are not able to come into
contact with the tyre wall or the spokes.

Tighten the brake shoe bolts(1) using a torque of
3 N·m (27 lbf ·in).

The brake shoe bolts are now fully assembled.

Actuate the brake lever 2-3 times on the handlebars.

All components of the brake cable system have now
settled and stretched.

Remove the sleeve nut.

Apply medium-strength thread lock to the thread of
the brake bolt.

Mount the sleeve nut and tighten it slightly to begin
with.

(g. 17)

14THMFIBULA

15THMFIBULA

ASSEMBLY

ASSEMBLY

3

4

1– 1.5 mm

BRAKE ALIGNING

Use a 5 mm Allen key (3) to align the brake at the
center.

Tighten the sleeve nut a bit.

Actuate the brake lever one time.

Check, if the distance between brake pad and rim is the
same one both sides.

If necessary, adjust the alignment of the brake by
moving it using the 5 mm Allen key (3).

18

Hold the brake with the Allen key and tighten the sleeve
nut with a torque of 10 N·m(27 lbf ·in).

WARNING

Risk of accident caused by malfunctioning or locking brakes
due to loose screw connections.

- Check the required tightening torque of all screw

connections after the rst 500km (310miles) –

re-tighten the connections if necessary.

ADJUSTING CABLE TENSION

Check the gaps between the brake pads and the braking
rim. These must be equal on both sides and should be
between 1 and 1.5mm (0.04 and 0.06in).

If necessary, adjust the gap by actuating the nut (4) on
the adjuster - when doing this hold the lower part of the
adjuster with your other hand.
Turn the nut (4) anti-clockwise.
The gap is increased.
Turn the nut (4) clockwise.
The gap is reduced.

Assembly and adjustment of the brake block is now
complete.

19

(g. 18)

(g. 19)

CHAINGING THE FIBULA SPRING

4

2

1

1

5

2

In cases where you have to exchange or to mount the
spring of the Fibula break, follow the steps detailed in
the section below:

Loosen the set screw (1) for the spring retainer (2) with

a 2 mm Allen Key. (g. 1)

Remove the spring retainer (2). (g. 1)

Take the spring (3) upwards out of the spring xture (4).

(g. 3)

Insert Spring (3) from above into the spring xture (4).

(g. 3)

Insert spring retainer (2) into recess (5) of the axis.

(g. 2)

Secure the spring retainer (2) with the set screw (1).

(g. 1)

WARNING

If not properly performed, assembly and maintenance work
could cause accidents resulting in death or serious injury.

- Do not overestimate your technical ability.

- All assembly and maintenance work should be performed
by a specialist workshop for bicycles. This is the only way
to ensure that work is conducted in a professional
manner.

2

THM assumes no liability for direct or indirect damage

4

resulting from negligence or improper use and installation
of the Fibula spring.

3

3

16THMFIBULA

17THMFIBULA

MAINTENANCE

MAINTENANCE

Important maintenance information

WARNING

If not properly performed, assembly and maintenance work could cause accidents resulting in
death or serious injury.

- Do not overestimate your technical ability. All assembly and maintenance work should be
performed by a specialist workshop for bicycles. This is the only way to ensure the work is
conducted in a professional manner.

Improperly performed assembly and maintenance work could also result in a loss of your warranty
rights (liability for defects)!

WARNING

Risk of accident caused by damaged components.

- Never attempt to disassemble your THM-Fibula racing brakes - only THM employees are
authorised to do this.

- Always read and observe all of the assembly and maintenance instructions in this manual, as
well as those provided in the manuals of other manufacturers whose products are used on your
bicycle (brake levers, cable system, frame, fork, wheels, etc.).

- Always observe the minimum and maximum values specied – see Technical specications,
from page 8.

- When conducting assembly steps that require a specic tightening torque, always use an
appropriate torque wrench that is designed for the tightening torque specied.

- Only ever use original THM components which are available from your specialist dealer or directly
from THM.

DISPOSAL

If THM components are defective or no longer in use, you can dispose of them with your non­recyclable waste or domestic refuse, or ask a local waste disposal company for other disposal
methods (e.g. recycling).

Opening the brake blocks

Open the brake blocks before disassembling your wheels.

WARNING

Risk of accident caused by non-functioning brakes due to open brake blocks.

- Make sure the brake blocks are always properly closed before setting o.

Press the brake blocks together rmly.

(g. 1)

Always ensure your bicycle is maintained in a awless condition. Care and maintenance will

prolong the service life of your bicycle and its components and also improve your personal safety!

If you suspect that your bicycle is defective or is not functioning properly, stop using it and
contact a specialist bicycle workshop immediately!

NOTICE

Never use a high-pressure cleaner or steam cleaner to clean your bicycle, as the seals of your
bicycle components are not able to withstand the pressure. If such cleaners are used, it would
result in corrosion and material damage.

Never use caustic solvents (such as paint thinners, acetone, nitro compounds, etc.) as they can
attack the surface of your THM components.

Only use commercially available paint care products and water to clean your THM components.
Spirit or petrol should be used carefully - when using such products avoid excessive wiping and
prolonged exposure times.

18THMFIBULA

1

Remove the adjuster (1) from its seating.

1

If the adjuster cannot be removed due to excessive cable
tension, press the two parts of the adjuster together.

Release the brake blocks.

The brake blocks are now open and you can remove
your wheel.

(g. 1)

2

After assembling your wheel reinsert the adjuster into
its seating.

Check the settings of your brakes and adjust if
necessary – see Adjusting cable tension, page 16.

19THMFIBULA

MAINTENANCE

MAINTENANCE

Before every journey

WARNING

Risk of accident caused by material damage or improper assembly.

- Check to ensure the quick release elements and your wheels have been rmly and correctly

secured.

- Check your brakes (brake block, lever, cables and pads) to make sure they are undamaged and
functioning properly every time you use your bike. Send us your THM-Fibula racing brakes before
further use if damage is visible (cracks, fractures, deformations, etc.) or if you are in any doubt
about their functionality.

- Check your THM components before each journey to ensure the surfaces are completely
undamaged. Send us your THM components for inspection before further use if damage is
visible (deep scratches in the paintwork which extend into the carbon structure, large abrasions,
etc.) or if you are in any doubt about their functionality.

- Do not exceed the maximum rider weight for which your THM components have been approved
– see Dimensions, page 8.

Check the braking rims of your wheels for foreign
objects – remove any foreign objects found.

Check the brake pads for damage (cracks, breakage,
etc.) and foreign objects (stones, shards of glass etc.).
Replace any defective brake pads with new ones before
riding your bicycle or remove the foreign objects.

Regular maintenance

The maintenance intervals required for your bicycle depend on how often and in which weather
conditions it is used.

The following maintenance measures should be conducted more frequently if the bicycle is used
in extreme conditions (rain, dirt, long distances, etc.).

When conducting regular maintenance procedures make sure your bicycle is always clean and
well protected by lubricants and cleaning agents. Ask your specialist dealer about appropriate
lubricants and cleaning agents as well as information relating to their correct application.

NOTICE

Reduction in the free movement of the THM-Fibula racing brakes due to adherence of dirt on
lubricated components.

- Do not apply any lubricant (grease, oil, silicone, Teon, etc.) to the joints of the brake blocks.

- The free movement of the THM-Fibula racing brake can be ensured by regularly cleaning the
joints with water.

NOTICE

Never use a high-pressure cleaner or steam cleaner to
clean your bicycle, as the seals of your bicycle components
are not able to withstand the pressure.

If such cleaners are used, it would result in corrosion and
material damage.

If you are using a hose, handle it with care - never aim the

hose directly at the bearing components (g. 3).

3

Clean your THM-Fibula racing brakes at regular intervals
by using water and a non-abrasive, environmentally
friendly cleaning agent.

Use a plastic scraper to remove any brake pad residue
from the braking rims of your wheels at regular
intervals. If required, use a cloth moistened with a small
amount of petrol or spirit to remove the last remaining
residues.

NOTICE

Risk of damage to the surface by dissolving the epoxy
resins.

- Only briey wipe the surface with the moistened cloth.

- Do not allow the petrol or spirit to react.

20THMCLAVICULA

21THMFIBULA

MAINTENANCE

WARRANTY

When cleaning your THM components always check
for signs of damage (dents, cracks, scratches, large
abrasions, worn areas, etc.).

WARNING

Risk of accident caused by malfunctioning brakes.

- After conducting any cleaning, maintenance or repair
work make sure that the braking rims of your wheels are

free from lubricants (such as grease, oil, silicon, Teon,

wax or other similar agents).

Periodically preserve the surface of your THM
components using a high quality protecting wax or
other similar agent.

Periodically check the gear and brake cables to ensure
they are moving freely.

Periodically check all bolts to ensure they are rmly
secure; when doing this observe the respective
tightening torques.

Materials defect liability

We provide a 24-month warranty for all THM products which covers material and processing
defects.

During this period all products accepted to be defective are replaced at no cost to the user.

The liability period starts at the time the relevant THM product was purchased. Liability does

not extend to any kind of damage caused by accidents, modications, negligence or improper

handling and use.

Liability shall expire if repair work or any other work on the THM product has been conducted by
unauthorised persons.

The same shall also apply to any direct or indirect damage resulting from an action described in
the preceding sentence.

Please contact us before returning a defective THM product!

If products are returned without our previous agreement, the shipping costs incurred will
be charged to your account!

Warranty

Minor damage to your THM products will be repaired by our workshop free of charge even after
expiration of the 24-month liability period, provided that the work required does not exceed

0.5 hrs.
The decision regarding whether or not a repair is to be carried out free of charge rests solely with
us.

If the damage has been self-inicted, there is no entitlement to free repair work!

In the event of self-inicted damage please send us the product concerned for inspection. We will
then assess the level of work required and either perform the repair free of charge or send you a
quotation. It is then up to you to decide whether or not to go ahead with the repair work.

When returning a damaged product to us please ensure adequate postage costs are provided.

Any shipment which is not prepaid will be rejected and returned to the sender! In the event
of irreparable damage (e.g. caused by an accident) we will provide a 40% discount from the
respective list price if you purchase a new THM product as a replacement.

The relevant claim must be forwarded directly to THM Faserverbund-Technologie GmbH. The
irreparable product shall then remain our property.

22THMFIBULA

23THMFIBULA

The company THM Faserverbund-Technologie GmbH is constantly striving to improve product
designs as technical developments continue. We therefore reserve the right to make alterations
which must not correspond to the text and illustration contained in this manual, and without

incurring obligation to alter any products previously delivered. Technical specications,

dimensions and weights are to be understood with the corresponding allowances.

Reproduction or translation of this publication, in whole or in part, is not permitted without the
written consent of the company THM Faserverbund-Technologie GmbH.
All rights under the provisions of the copyright act are reserved.

24 25THMFIBULA THMFIBULA

THM Faserverbund-Technologie GmbH
Am Sportplatz 3
D-24791 Alt Duvenstedt

[e-mail]

www.thm.bike

thm.bike