MINOURA TRUE-PRO User manual

Wheel Truing Stand
TRUE-PRO
instructions manual
Thank you for choosing the MINOURA TRUE-
PRO.
This portable wheel truing stand features our
convenient AUTO CENTERING system. ACS
allows you to perform almost every procedure
needed in building a wheel without the need for an
additional dishing tool.
Also, newly designed gauges that check vertical and
horizontal movement of the wheel are intuitive and
easy to use.
TRUE-PRO folds down completely for easy trans-
port and storage.
Please read this instructions manual carefully before
use and keep handy at all times for future references.
Important Notes
!
• Do NOT use True-Pro for any purpose other
than instructed such as display stand or
indoor trainer.
• This Auto-Centering system is not 100%
perfect so we recommend you to use a
wheel dishing tool together for much more
precise adjustment.
• Setting wheel in the correct position is
crucial. Push down the wheel to set it in
the deepest position on the Axle Holder
when you tighten the quick release skewer. - 1 -
Arm
Vertical Gauge
Adjust Knob
Vertical Gauge Side Gauge
Side Gauge
Adjust Knob
Arm Lock
Components
• PILLARS
Both right and left side Pillars are connected in the
Body so they will move together at the same time.
You should hold both Pillars with both hands when
opening or closing them.
• AXLE HOLDER
Axle Holder can adjust its angle to keep parallel at
any width to t hubs properly. (see Fig. A)
It is crucial to set the wheel into the deepest position
of the Axle Holder by pushing down the wheel when
setting up the wheel on True-Pro to get better result.
If one side has been lifted up due to bad installation,
the wheel won't be symmetrical.
Axle Holder
Pillar
Leg
Body
Lock Knob
Gauge
Stay
(Fig. A)

• VERTICAL GAUGE
Vertical gauge is for checking the vertical movement
of the wheel. When the rotating wheel comes in
contact with the Vertical gauge, you will hear a
scratching sound.
To adjust the gauge position, rotate the Vertical
Gauge Adjust Knob. (see Fig. B)
Vertical Gauge should be positioned 1 - 2 mm away
from the rim. (see Fig. C)
If the movement is so heavy, you should place the
gauge farther, then set it closer gradually as the
adustment is being done.
If you mount a wheel with tire for just checking the
horizontal movement, you can fold down the Vertical
Gauge manually. (see Fig. D)
(Fig. B)
Checking Position
The metal tip on the Vertical Gauge can be removed
by loosening two screws if you don't wish to scratch
the soft carbon rim surface.
However, we recommend you keep the metal tip in
contact at all times.
• SIDE GAUGE
Side gauge checks for horizontal movement. Spin
your wheel and hear a scratching sound.
To adjust the opening of Side Gauge, rotate Side
Gauge Adjust Knob, then both Arms will move
together at the same time. (see Fig. B)
Side Gauge should be positioned 1 - 2 mm away
from the rim side wall. (see Fig. C)
If the movement is so heavy, you should place the
gauge farther, then set it closer gradually as the
adustment is being done.
If you already set the best opening size of the Side
Gauge to your rim but the wheel has a tire, you can
open the Arm manually for quicker installation.
To do so, hold the Arm then open it until it is locked
at the widest position. (see Fig. E)
(Fig. C)
Foldable Vertical
Gauge
- 2 -
(Fig. D)
How to Operate
(Fig. E)

The metal tip of the side gauge can be retracted by
turning the screw and tip if you worry about damage
to the side of your rim. However, some contact must
be maintained so you can hear if the wheel needs
adjusting.
Normal Position
(metal tip is projected)
Carbon Position
(metal tip is retracted) (Fig. F)
- 3 -
How To Fold Down
True-Pro is completely foldable for easier
transportation and compact storage.
To fold down, follow the steps;
1. Shut the Side Gauge as narrow as possible.
2. Loosen the Lock Knob.
3. Open the Pillars slightly.
4. Fold the gauges downward and push toward the
Pillars.
5. Flip up the Leg until it touches the Gauge Stay.
6. Tighten the Lock Knob.
7. Close the Pillars until it touches the gauges.
!
Be careful not to pinch your ngers
between the body, stay and leg.
How To Use T-Gauge2
(Fig. G)
T-Gauge2
(Fig. H)
The T-Gauge2 checks the position of your True-Pro
to make sure it is centered exactly so your wheel
should be able to be trued as symmetrically as
possible.
It's crucial to check the gauge position at the
point where you work on the actual wheel.
Also you should check regularly before using True-
Pro to avoid mistakes.
(Fig. I)
T-Gauge2 Setup
Position
T-Gauge2 should be installed on the Axle Holder as
deep as the case of wheel.
Loosen the knob nut, insert into the Axle Holders.
Make sure each metal washer is located inside of the
Axle Holder to keep the angle as vertical as possible.
While pushing down the T-Gauge2, tighten the knob
nut to x the position.
Put the Side Gauges close to the T-Gauge2, then shut
the Side Gauges by turining the adjust knob.

Check the clearance between T-Gauge2 and each
Side Gauge.
If each clearance is equal, your gauge position is
perfect. (see Fig. J)
Check these
clearances
(Fig. J)
If one side is wider and another side is closer, you
need to adjust the gauge position with the following
steps;
(Fig. K)
1. Loosen two screws which are located underneath
the gauge body with a 4 mm hex wrench.
(see Fig. K)
2. Adjust the gauge position side by side until both
clearances between the T-Gauge2 and the Side
Gauges become equal.
3. When the position is xed, tighten both bolts
rmly.
!
- 4 -
The gauge should not miss its
position so easily while using True-
Pro gently.
Do NOT hit the gauges or handle
roughly to keep proper position.
About Offset Wheel Setting
(Fig. L)
At rst, you should understand that you should
x the vertical movement prior to the horizontal
movement, especially on the rear wheel because of
its unique wheel system named "Offset".
Offset Wheel
Tensioning the front wheel is much easier than
the rear. Rear wheel tensioning requires Offset
Tensioning.
The rear wheel has a different spoke angle pattern
when looking at it from behind. (see Fig. L)
A rear hub is not symmetrical to the wheel. Flanges
can be far from center. Because the rear hub must
have extra space for gearing, you will need to true
using Offset Tensioning.
If offset wheel, the torque works mostly only to the
right side spokes. Because right side spokes should
be assembled more vertically than left side.
So you should understand that right side spoke
tension is more important than left side spoke's one
in this offset assembling.
Well adjusted right side spokes can keep your wheel
stable in the future. Left side spoke tension is just a
help.
Understand that the nipple should not be loosened
at any time. Nipples are made from softer alloys or
brass and are prone to stripping easily.
You must use a correct spoke wrench
which ts the nipples perfectly,
especially when you use light alloy
nipples on your wheel.
If you use wrong size one, the nipple
will be round easily and you cannot
continue your work any more.
!

- 5 -
How To Fix Vertical Movement
The vertical movement within 3 mm may not cause
any troubles. But if you want to be it as zero as
possible for smoother ride, you should try again and
again with the following process.
It is similar to the process as for horizontal
movement.
Be sure, in this case, you should tighten both side of
the nipples equally.
A
B
C
B
A
(Fig. M)
1.
You set the wheel on the True-Pro and see the
Vertical Gauge.
Put the tip of the Vretical Gauge close to the surface
of the rim.
2.
Rotate the wheel slowly, and check the vertical
movement.
3.
Attach vinyl tapes to two spokes; one is in the
beginning and another one is in the ending of vertical
movement.
4.
Make three (3) groups of spokes between your vinyl
markers as below;
Group-A: 3 or less spokes in the beginning and in
the ending of vertical movement.
Group-B: 3 or less spokes between Group-A,
except for the center spoke.
Group-C: The center one between the vinyl tapes.
5.
If the rim moves to outward, tighten both side
nipples.
If the rim shakes inward, do NOT loosen the nipples
and tighten both far side nipples.
This is because the nipples are made of soft material,
so its thread can be broken easily by loosening.
6.
Tighten the spokes as below;
• Group-A nipples about 1/8 turns
• Group-B nipples about 1/4 turns
• Group-C nipples about 1/2 turns
Then check the vertical movement again with
rotating the wheel slowly.
If the wheel moves yet, continue the process again.
If you hear a strange sound or see
metal "lines" or residue, your nipple
will fail soon.
Do NOT apply any lubricant to quiet
the sound. Put a new nipple on
immediately.
!
How To Fix Horizontal Movement
The horizontal movement within 2 mm may not
cause any troubles. But if you want to be it as zero as
possible for smoother ride, you should try again and
again with the following process.
1.
You set the wheel on the True-Pro and see the Side
Gauges.
Put the tips of them close to the surface of the rim
side wall. Do not touch the rim.
2.
Rotate the wheel slowly, and check the horizontal
movement.
3.
Attach vinyl tapes to two spokes; one is in the
beginning and one is in the ending of horizontal
movement.
!
Do NOT tighten the spoke more
than 1/2 turns at one time. Wheel
truing must be done step by step.
Otherwise, you will loose the spoke
tension balance completely.

4.
Make three (3) groups of spokes between your vinyl
markers as below;
Group-A: 3 or less spokes in the beginning and in
the ending of horizontal movement.
Group-B: 3 or less spokes between Group-A,
except for the center spoke.
Group-C: The center one between the vinyl tapes.
5.
If the rim moves to right, tighten the left side nipples.
Do NOT loosen the right side nipples.
This is because the nipples are made of soft material,
so its thread can be broken easily by loosening.
6.
Tighten the spokes as below;
• Group-A nipples about 1/8 turns
• Group-B nipples about 1/4 turns
• Group-C nipples about 1/2 turns
Then check the horizontal movement again with
rotating the wheel slowly.
If the wheel moves yet, continue the process again.
If you hear a strange sound or see
metal "lines" or residue, your nipple
will fail soon.
Do NOT apply any lubricant to quiet
the sound. Put a new nipple on
immediately.
!
!
Do NOT tighten the spoke more
than 1/2 turns at one time. Wheel
truing must be done step by step.
Otherwise, you will loose the spoke
tension balance completely.
- 6 -
For More Information...
 *Pleasecontacttheshoprst
 whereyoupurchasedTrue-Pro.
MINOURA Japan Headquarters
(for ALL customers)
1197-1 Godo, Anpachi, Gifu 503-2305 Japan
Phone:[phone]
Fax: [phone]
Email: [e-mail]
URL: www.minoura.jp
MINOURA North America
(for U.S. residents only)
1996 East Ave, Hayward, CA 94541 U.S.A.
Phone:[phone]
Fax: [phone]
Email: [email protected]
Limited Warranty Policy
1. Only the original user who purchased this True-Pro
in brand-new and unopened condition at an authorized
Minoura dealer, authorized internet retailer or authorized
mail order house (hereafter "Original User") is covered
under the Minoura Warranty Service Program (hereafter
"Warranty Service").
2. Any used or new True-Pro, either purchased or given
through a shop, internet auction site or person-to-person
**Forcountriesnotlisted,pleasesee
ourwebsiteatwww.minoura.jptond
theMinouradistributorinyourcountry
andcontactthemforservice.
Made in Japan
will not be covered under Warranty Service, except under
special circumstances to be determined by Minoura.
3. Original User must keep the original sales reciept and
must present a photocopy of the reciept together with a
claim report to obtain Warranty Service.
4. The warranty period shall start from the date of
purchase. If the reciept is not presented, Minoura reserves
the right to extend or deny Warranty Service.
5. All warranties will be void if the True-Pro is damaged
due to user's abuse, disassembly, unauthorized alteration
or midication, or used in any way not intended as
described in the instructions manual.
6. Only issues caused by manufacturer's defects will be
covered to all users at Minoura's expense. The period
expires in a maximum of 7 years after the last production.
7. Minoura may offer paid service for in or out of warranty
products that may include, but is not limited to, repair,
replacement and shipping expenses.

TG-1
TG-2
TG-4
TG-5
TG-7
TG-3
TF-1
TF-2
TG-8
TG-9
TF-3
TF-4
TG-6
TB-1
TB-2
TB-3
TB-4
TB-5
TB-6
TB-7
TB-7
TB-6
TF-1: Main Body
TF-2: Axle Holder
TF-3: Leg
TF-4: Lock Knob
TG-1: Gauge Body
TG-2: Vertical Gauge
TG-3: Vertical Gauge Plate
TG-4: Arm (Right)
TG-5: Arm (Left)
TG-6: Side Gauge Plate
TG-7: Upper Cover
TG-8: Spring (Right, Silver)
TG-9: Spring (Left, Black)
TB-1: Cap Bolt M5x25
TB-2: Tapping Screw M3.5x12
TB-3: Screw M4x10
TB-4: Screw M4x12
TB-5: Cap Bolt M5x10
TB-6: Cap Bolt M6x25
TB-7: Cap Bolt M5x15
True-Pro Resolution Diagram