Mechanical Disc Brake Caliper (Post mount)

User's Manual
Important Notice

Do not install the parts if you are not an expert on bicycles. If you are not sure
about the work, ask a professional store to do the work.
If you have any questions about the contents of this manual, contact the dealer
where you purchased the product or mail to GROWTAC (winfo@growtac.com).
Do not attempt to install if you are unsure for assembling.
GROWTAC is not responsible for any damage or injury caused by accidents
that occur during use it other than defects in the product. (This includesincorrect installation, lack of maintenance, etc.)
Concept & data regarding the design and features of this product areavailable on our website. We recommend that you read this information
before using the product.
Dealer manuals are available on our website.
For your safety, please read this user’ s manual carefully before installingand using the product.

Caution / Warning［Warnings］
Be sure to follow the instructions when installing.
It is recommended to use genuine EQUAL products for the mounting bolts,
brake pads and other consumables. It may cause serious accident if thebrakes are not adjusted correctly, they may not work.
The calipers and disc brake rotors will become hot when the brakes areoperated. Do not touch them while riding or immediately after riding abicycle. Otherwise, you may get burned.
Do not allow grease or other oil to get on the rotor or brake pads. If grease oroil gets on the rotor or brake pads, the brakes will not work, which isextremely dangerous. Ask your dealer what to do If grease or oil gets on thebrake pads.
Before riding, be sure to check that the thickness of the brake pads is at least
0.5 mm. If the pads are worn out beyond this point, the brakes may not work.
If the pads are worn out, replace them with new brake pads referring to "6-1
Replacing the brake pads".
Standard brake pads: EQUAL disc brake pads DBR-PADA01(Shimano roadcompatible).
When the brake pads are worn out, adjust the clearance with reference to"5-1 Adjusting the brake pad clearance". If the brake pads continue to be
used without adjustment, the brakes may become ineﬀective.
Before riding, make sure that the brake cable is not frayed. If there are anyloose ends, the brake cable may break and the brake will not work.
If the front brake is applied too hard, the front wheel may lock, causing thebicycle to fall forward and cause serious injury.
The braking distance becomes longer in rainy weather. In wet condition, thebraking distance is longer, so reduce speed and brake earlier.
If you brake suddenly when the road surface is wet, the tires may slip and you
may fall over. When the road surface is wet, braking suddenly may cause thetires to slip, resulting in a fall.
Make sure that the pin does not enter the danger zone of the swing arm when
the brake is applied. If the pin enters the “Danger Zone” , replace the brakepad or adjust the clearance.
Make sure that the brake pad mounting screws are properly tightened.
［Cautions］
When the brake pads or rotors are replaced with new ones, the brakes will beless eﬀective.
Please test it quite few times in a safe place and in safe speed.
When the brake is applied, a braking sound may be heard.
If you have any questions about installation or adjustment, please contact
your dealer or mail to GROWTAC (winfo@growtac.com). We will reply to you
within 3 business days.

Fixing bolt for Inner cable

4-3. Outer casing installation

Brake- leverage gauge

This product provides high braking power by using a combination of two types

Danger Zoneof outer casings designed speciﬁcally for this product.*Soft outer casing

Pin

This is a ﬂexible outer casing that is used for areas with tight bends such as

Adjustment screw

1. List of speciﬁcation parts (Component parts list)

for outer padaround the handlebar, or where handling may be adversely aﬀected.

Hard outer casingThis is a casing with high rigidity. This type of casing is mainly used to improve
braking power. This casing is mainly used to improve the braking force.

Disc brake caliper (per caliper body)* If the hard outer casing is not used, the original braking force may not be achieved.

2 pcs

Disc brake pads (built into the body)

Setting Example

1 pc

Brake pad mounting screw

1 pc
1 pc
1 pc

2 pcs
1 pc

Disc caliper body

Pad retaining spring (built in)At Handlebar Area
Cap for pad adjustment hole

Cap for pad adjustment hole

Fxing bolts for caliper

We have an installation video for your reference

Rubber ring

Hard outer casing (1700mm)

1 pc

Slick inner cable for drop handlebar lever(1900mm SHIMANO road lever compatible)

Outer casing connector (5.0mm-5.5mm)

2 pcs

Outer casing cap 5mm

4-1. Initial position setting of the brake-leverage adjustment bolt

Adjust the gap of the brake-leverage adjustment bolt so that it is 1~2mm.

Outer casing cap for caliper

1 pc

Slick inner cable for ﬂat handlebar lever (1900mm)

Soft outer casing

Soft outer casing (1000mm)

2 pcs

Outer casing cap 5mm

Attach the outer cap for the lever to the brake lever and install the hard outercasing.

Outer casing cap for caliper

4-2. Temporarily fasten the caliper

Inner cable cap

When mounting directly to the frame

Lightly assemble the brake caliper to the frame.

2. List of Tools used
Wire cutter

OUT

Using Hard outer casing for Flat handlebar

Outer casing cap for ﬂat handlebar lever

Outer casing connector (5.0mm-5.5mm)

Hex keys

OUTmore.

2 pcs1 pc

IN*If you want to put the outer connector inside the frame, you must have a hole of 6.6mm orHard outer casing (1700mm)

1 pc

Hard outer casing

1~2mm

Inner cable cap

1 pc
1 pc

Outer casing connector

IN

Cable set for ﬂat handlebar (per caliper body)
1 pc

Frame

4. Installation procedure

Soft outer casing (1000mm)

2 pcs
1 pcs

Handlever. are almost identical except for the mounting area . )

1 pc

1 pc

Use a hard outer casing for the part where the wiring is straight.

(the video shows ﬂat mount, post mount ver. and ﬂat mount

Cable set for drop handlebar (per caliper body)
1 pc

Using Soft outer casing for Drop handlebar

Use the soft outer casing for areas with tight bends.

Ensure that the caliper moves in a fragile manner (use a 5 mm hex key) and thenadjust to the optimum position.)

2.5mm/3mm/5mm

Hard outer casing

For ﬂat handlebars, it is recommended to use only the hard outer casing, but if

3. Caliper main body part names
Swing arm

Outer casing caps for levers

the rebound is too strong and you see bad eﬀects on your handling, use the soft
outer casing as well as the drop handlebars.

Brake-leverageadjustment bolt

At Caliper area

Cut the outer casing to the appropriate length, install the outer casing cap forthe caliper. Then, attach a rubber ring to the inner cable and connect it to thecaliper body.

Hard outer casing

Outer casing caps
for calipers

Fixing screw
for brake pad

Fixing bolt
for frame

Adjustment screw for inner pad
Caliper center marker

Rubber ring
To change the rotor size

Prepare a third party mounting adaptor.

Assemble according to the adapter manual.

4-4. Installing the inner cable

Loosen the inner cable ﬁxing bolt on the swing arm suﬃciently to allow the innercable to pass through. Pass the inner cable through while pushing the swing arm
fully in the left rotation direction.

After the inner cable is passed through, move the swing arm back, pull the innercable, and then secure it once with the inner cable ﬁxing bolt (3mm hex key,speciﬁed torque 4Nm).

4-8. Adjusting the brake pads

Turn both brake pads adjustment screws to the left direction to increase theclearance between the rotor and brake pads. After widening, refer to "5-1
Adjusting the brake pad clearance" to adjust the clearance appropriately.

4-9. Breaking-in the brake pads

After replacing the brake pads or rotors, the braking eﬀect will be weakened

until they are acclimated. Repeat stopping from a safe speed in a safe place, andstart using the brakes only after the brakes are suﬃciently eﬀective.

5-2. Adjusting the Brake-Leverage

This has a function to adjust the braking force. Hence, you can make adjustments
according to your comfortable braking.

It is recommended that you use the default settings at ﬁrst, and then optimize
them with your favorite settings.

After "5-1. Adjusting the brake pad clearance", lightly depress the lever, andwhen the pad touches the rotor, the position of the brake-leverage gauge indicatedby the pin will be the standard position.
Standard position

5. Adjustment②Let through

It is necessary to adjust the clearance of the brake pads in the following cases.

Pull a lever✓ Immediately after installing the brake caliper.

Follow the procedure below to replace the left

Replacement ProcedureⅠ Widen the clearance between pads and the rotor.

Before removing the pads, turn left the pad adjustment screws to increase
spaces between the rotor and pads.

below).

and the inside.

Ⅴ Install new pads (see. ① - ③).

Use a 3mm hex key to adjust the pads. Turning the pad adjustment screw to theⅥ Install the wheel on the frame.

right (clockwise) will narrow the clearance between the rotor and pad, andⅦ Adjust the clearance of the pads.

turning it to the left (counterclockwise) will widen the clearance.

See reference to "5-1 Adjusting the brake pad clearance".

Caution: Do not operate the pad adjustment screw without brake pads.
Otherwise, the internal parts may come oﬀ.

☆

Turn the left and right brake pad adjustment screws and push both pads out

until the rotor is ﬁxed (3mm hex key). Pinch the rotor between both pads so that

* The standard position depends on the adjustment of the brake pad clearance.

the caliper center marker and the center of the rotor are on the same line.

Adjustment Procedure

Caliper center marker

2.5

ⅠRelease the outer pad from the rotor

Align the rotor to the center①Turn the outer pad adjustment screw to the left to increase the clearance

Adjust-Adjust-

ment

ment

Adjust-Outsidement

InsidePreferred position

Ends not in contactwith rotor

Adjustment Procedure

Brake pads

②Ⅱ Adjusting the brake-leverage③

1 - 1.5 N·m

When the brake-leverage adjustment bolt is turned to the left, the swing arm will
move in conjunction with it in the direction of left rotation. Adjust using theⅢ Adjusting the clearance of the outer pad
Adjust-ment

between the rotor and pad.

ｍｍbrake-leverage gauge and pin marked on the inside of the swing arm as a guide.

PinchRotor

To operate the pad adjustment screw, refer to "5-1 Adjusting the brake padclearance". When the center of the rotor and caliper are aligned, tighten thetemporarily fastened caliper ﬁxing bolts to the frame you are using with theappropriate torque.

CAUTION :Do not operate the pad adjustment screw without brake pads.
Otherwise, the internal parts may come oﬀ.

4-6. Breaking-in the cable

Squeeze the brake strongly about 10 times to break in the cable.

4-7. Fixing the inner cable

Loosen the inner cable ﬁxing bolt once, pull the inner cable to remove any slackin the wire, and secure it again with the inner cable ﬁxing bolt (3mm hex key,speciﬁed torque 4Nm). Cut oﬀ the inner cable leaving about 20 mm of its
allowance, and install the inner cable cap.

0.5mm or less,be sure to replace the brake pads.

The pad can be easily removed by pressing it from the top with a hex key (see ☆

extremely dangerous. When adjusting the clearance, adjust both the outside

4-5. Fixing the caliper (centering)

Replace your brakepad, if it becomesless than 1mmthickness.

pads. If the thickness of the brake pads becomes

Ⅳ Remove the pad.

If you do not adjust, brake may not work even if you hold a brake lever, which is③Pullthan 1mm, it is recommended to replace theⅢ Use a 2.5mm hex key to remove mounting screws for brake pads.

✓ When the brake pads are worn out.

④Fix

If the thickness of the brake pads becomes less

Ⅱ Remove the wheel from the frame.

✓ After brake pad replacement.

①Push

6-1. Replacing the brake pads

and right pads at the same time.

Image after increased
brake-leverage

Pull a lever

5-1. Brake Pad Clearance Adjustment

6. Maintenance

Ⅰ Adjust the inner pads

Adjust the clearance between the brake pads and the rotor to the point where
no contact noise is heard when the wheel rotates.
Tips

After narrowing the brake pad until it makes contact with the rotor, turn thepad adjustment screw to the left while turning the wheel, and then turn itback until there is no contact sound with the rotor.

With reference to "5-1 Adjusting the brake pad clearance", turn the padadjustment screw on the outside of the bike to the right to adjust the clearance.

Ⅳ Conﬁrmation by actual riding

Check the “brake-leverage” by actual riding. If the feeling is not to your liking,perform steps Ⅰ to Ⅲ again to make adjustments.

The tip to adjusting the brake-leverage is to ﬁrst adjust the scale signiﬁcantly

and then try to feel the diﬀerence in braking force between each. After that,make ﬁne adjustments.
Braking force

Recommended
Zone

While operating the brake lever, adjust the pad position to achieve the desired
amount of pull.

Ⅲ Checking the brakes

Grip the brake lever and check that the brake is applied correctly.

Adjust the brake-leverage so that the pin does notenter the Danger Zone when the brake lever isdepressed.Brakes may not work if the pin enters

When replacing the pads, wipe oﬀ any brake debris or other dirt from the caliper itself.
When replacing with new brake pads, the brakes will be less eﬀective until they ﬁt in.
after the brakes have been applied and the brakes are fully eﬀective.

Due to individual diﬀerences in brake pads, some of them may not ﬁt into the caliper due
to their large width. If this is the case, you can use a ﬁle or similar tool to shave oﬀ a little of
the width on both sides.

Before riding, be sure to check the following topics. If any error is found, adjust,replace, or contact your dealer or mail to GROWTAC (winfo@growtac.com). We
Brake-leverage gauge

CAUTIONBe careful not to get any oil or grease on the rotor or pads.

7.Daily Inspection before Riding

DengerZone

Ⅱ Outside pad adjustment

Do not reuse the brake pad mounting screws.

Repeat testing brakes from a safe speed in a safe place and start using the brake pads only

Tips

FunctionalZone

CAUTION :Always check the gauge position

not for pin to point “Danger Zone”

will reply to you within 3 business days.

✓ The front and rear brakes should work properly.
✓ The brake lever has the correct amount of pull.

✓ There should be no fraying or cracking of the outer casing or inner cable.
✓ The thickness of the brake pads must be 0.5 mm or more.

✓ The pin must not enter the Danger Zone when the brake lever is depressed.

the “Danger Zone” , which is very dangerous. Besure to check the position of the feeling gauge

before riding, and if you feel any discomfort in thebraking while riding, check the position of thebrake-leverage gauge and adjust it as necessary.

v1_202111