Here is the full report for the Nankang Roadiac from the motorcycle

Transcription

Test Report
from
Motor Presse Stuttgart GmbH & Co KG
Leuschnerstrasse 1 - 70174 Stuttgart
On behalf of:
Delticom AG
Mr. Jens Engelking
Brühlstrasse 11
30169 Hannover
Tire Test
May 2011 Germany
Order number:A_11_Delticom_04_reif_02
Page 1 of 42
This report is only intended for distribution in its entirety and may not be reproduced in parts without agreement in writing
from Motorrad TestCenter
© 2011 – Motorrad TestCenter, Leuschnerstrasse 1, 70174 Stuttgart, Telephone: 0711-182 1862
Englisch_Prüfbericht_11_Delticom_04_reif_02_B.docx / 17.06.2011
Contents
A
Foreword
Page 03
B
Test conditions
Page 05
B.1
Test tracks
Page 05
B.2
Test evaluation
Page 08
B.3
Test drivers
Page 08
B.4
Weather conditions
Page 08
B.5
Test equipment
Page 08
B.6
Tire check-in reports
Page 10
B.7
Vehicle identification
Page 13
C
Explanations of Motorrad
TestCenter testing procedures
Page 15
D
Evaluation of the test tires
Page 17
E
Conclusion
Page 41
Page 2 of 42
A
Foreword
The new Nankang Roadiac radial tire was tested and evaluated in
comparison with the:
Î Avon Storm AV 55 Storm ST 2 Ultra / AV 56 Storm ST 2 Ultra
(designated "Avon Storm" hereafter)
and the:
Î Bridgestone Battlax BT 023
(designated "BT 023" hereafter)
The test vehicle for the following tire dimensions:
Front:
Rear:
120/70ZR17
180/55ZR17
was a Suzuki GSF 1200 Bandit, model year 2001, which was organized
and provided by MTC.
The motorcycle was in an excellent technical condition.
In order to facilitate testing with a sporty riding style and at extreme
lean angles, the standard footrests were replaced with shorter sport
footrests.
The suspension elements were checked and adjusted by the staff of
MTC to suit the testing conditions (see point B).
The air pressures for the respective vehicle dynamics tests were
discussed with Mr. Jens Engelking at the first meeting held on 22 July
2010 and were set to:
Front:
Rear:
2.5 bar
2.9 bar
During the testing period, all of the tires were driven and evaluated on
the respective testing ground in accordance with the test modules of
the Motorrad TestCenter. The ambient conditions were very good for
all tests and remained constant throughout the entire testing period.
Page 3 of 42
A
Foreword
The MTC staff carried out the following testing tasks:
9 Procurement and technical preparation of test motorcycle
9 Mounting of the test tires supplied by Delticom on three sets of
rims provided by MTC
9 Changing the wheels with the pre-mounted test tires
9 Organization of testing times at Bosch testing ground in Boxberg
9 Organization of testing times at ATP testing ground in Papenburg
9 Development of testing procedure
9 Development of testing schedule
9 Installation of 2D data recording system with GPS and steering
angle sensor
9 Recording of all data and measurement values
9 Transport of test motorcycle and equipment to the respective
test tracks
9 Evaluation of the 2D data recording
9 Authoring of test report and points ranking
9 Cleaning and returning test motorcycle to the as-received
condition
Page 4 of 42
B
Test conditions
B.1
Test tracks
B 1.1
Module: Cornering - Adhesion
Germany:
Bosch Test Center Boxberg
Robert Bosch GmbH
Prüfzentrum Boxberg
Robert Bosch Strasse 25
97944 Boxberg-Windischbuch
http://www.bosch-boxberg.de/de/10/index.asp
Source: Google-Earth
Page 5 of 42
B
Test conditions
B.1
Test tracks
B 1.2
Module: Wet conditions
Germany:
ATP – automotive testing papenburg
ATP Automotive Testing Papenburg GmbH
Johannes-Bunte-Strasse 176
26871 Papenburg
http://inet.atppbg.de/index
Source: Google-Earth
Page 6 of 42
B
Test conditions
B.1
Test tracks
B 1.3
Module: Freeway - High-speed stability
Germany:
Section of freeway
Freeway A 81
Kreuz Weinsberg (freeway intersection) near
Heilbronn
Autobahndreieck (freeway intersection) Würzburg
West
Page 7 of 42
B.2
Test evaluation
A standard maximum of 20 points is awarded for all criteria in the
Motorrad TestCenter points evaluation system. This 20 point spread
allows tires of different designs and intended uses to be compared
within a test field.
Example:
Comparison between touring tires and the current sport or
supersport tires.
B.3
Test drivers
The evaluation of the tire pairings was carried out by two test drivers
who performed the testing and evaluation according to the same
procedure and based on standardized, stipulated criteria - see point C.
B.4
Weather conditions
11.05.2011 Test-Day_01 :
dry and sunny / clear sky
13.05.2011 Test-Day_02 :
dry and sunny / clear sky
The test tracks were in good condition and clean. Further details about
the weather conditions can be found with the evaluation results under
the "Test conditions" heading.
B.5
Test equipment
Measuring equipment used to document the test conditions:
Æ Infrared thermometer IR-380 (www.voltcraft.de)
Æ Tire pressure measuring device (www.flaig-praezission.de)
Æ Weather station WS 3600 (www.heavyweather.info)
Neutral lean angle
The values shown here represent the "neutral lean angle". This is the theoretical lean
angle calculated from the speed and turn radius without taking the overall center of
gravity and tire width into account.
Page 8 of 42
B
B.5
Testt equipm
ment
All test drives were recorded
d with the
e 2D data
a recordin
ng system
m. The
da
ata are used to su
upport the
e subjective evalua
ation.
g system was used
d on the test
t
vehic
cle (Suzuki
A 2D data recording
Bandit GSF
F 1200 S)) to recorrd the GPS data. The
T
follow
wing senso
ors
w
were
also installed:
O
Overview:
Se
ensor
Attac
chment to
t test v
vehicle
2D
D data log
gger
GP
PS antenn
na:
AC
C-GPSANT
T2-000
Lin
near pote
entiometer
(stteering an
ngle):
SA
A-LP150D
Ord
der number:A_11_
_Delticom_04_reiff_02
Page 9 off 42
This report is on
nly intended for distribution
d
in its entirety and may
m
not be reprod
duced in parts w
without agreemen
nt in writing
© 2011 – Motorrrad TestCenter, Leuschnerstrasse
L
1,
1 70174 Stuttgartt, Telephone: 0711
1-182 1862
Eng
glisch_Prüfbericht_
_11_Delticom_04_
_reif_02_B.docx / 17.06.2011
B.6
B 6.1
Avon
Front tire:
Rear tire:
Tire manufacturer:
Avon
Tire manufacturer:
Tire size:
120/70ZR17 MC58W Tire size:
Tire model and
special designation:
AV 55 Storm ST 2
Ultra
Tire model and
AV 56 Storm ST 2
Ultra
DOT
Manufacture date:
#1: 44/09
DOT
Manufacture date:
#1: 03/10
#2:
Avon
180/55ZR17 MC73W
#2:
Country of
manufacture:
England
Country of
manufacture:
England
Width in mm:
117 mm
Width in mm:
191 mm
Weight in kg:
#1/ 4.5 kg
Weight in kg:
#1/ 6.6 kg
#2/
#2/
Air pressure in bar:
2.5 bar
2.9 bar
Measuring
temperature in °C:
20° C
Measuring
temperature in °C:
20° C
Balance weight in g:
35 g
25 g
Tread make-up
2 Rayon
Tread make-up
2 Nylon
2 Aramid
Sidewall make-up:
2 Rayon
1 Steel
Sidewall make-up:
2 Nylon
Page 10 of 42
B.6
B.6.2
Bridgestone
Front tire:
Rear tire:
Tire manufacturer:
Bridgestone
Tire manufacturer:
Tire size:
Tire model and
Battlax BT 023 F
Tire model and
Battlax BT 023 R
DOT
Manufacture date:
#1: 50/09
DOT
Manufacture date:
#1: 44/09
#2:
Bridgestone
180/55ZR17 MC73W
#2:
Country of
manufacture:
Japan
Country of
manufacture:
Japan
Width in mm:
120 mm
Width in mm:
184 mm
Weight in kg:
#1/
4.9 kg
Weight in kg:
#1/
6.6 kg
#2/
kg
#2/
kg
2.5 bar
2.9 bar
Measuring
temperature in °C:
20 ° C
Measuring
temperature in °C:
20 °C
30 g
25 g
Tread make-up
2 Rayon
Tread make-up
2 Nylon
1 Nylon
1 Steel
1 Steel
Sidewall make-up:
2 Rayon
Sidewall make-up:
2 Nylon
Page 11 of 42
B.6
B.6.3
Nankang
Front tire:
Rear tire:
Tire manufacturer:
Nankang
Tire manufacturer:
Tire size:
Tire model and
Roadiac
Tire model and
Roadiac
DOT
Manufacture date:
#1: 08/11
DOT
Manufacture date:
#1:
#2:
Nankang
180/55ZR17 MC73W
08/11
#2:
Country of
manufacture:
Taiwan
Country of
manufacture:
Taiwan
Width in mm:
119 mm
Width in mm:
178 mm
Weight in kg:
#1/
Weight in kg:
#1/
4.8 kg
#2/
6.85 kg
#2/
2.5 bar
2.9 bar
Measuring
temperature in °C:
20 ° C
Measuring
temperature in °C:
20 °C
35 g
20 g
Tread make-up
2 Polyester
Tread make-up
1 Polyester
1 Steel
Sidewall make-up:
2 Polyester
1 Steel
Sidewall make-up:
1 Polyester
Page 12 of 42
B.7
B.7.1 Vehicle identification
Manufacturer:
Suzuki
Model designation:
Bandit GSF 1200 S
Chassis number:
JS1A9111100100239
Internal code / designation
License plate
S-XX 8
Engine number:
Transmission number:
Other characteristics:
Shortened sport footrests
Weight fully fueled with all
operating fluids in kg.
247
Wheel load distribution in kg.
/%
Front: 224 / 50
Wheelbase in mm:
1430 mm
Head angle in °
64.4 °
Mileage at start of test in km
19 990
Mileage at end of test in km
20 210
Mileage driven during testing
in km
220
Rear: 123 / 50
Page 13 of 42
B.7
B.7.2
Suspension components
Wheels and tires / front wheel
Type:
Cast aluminum wheel
Rim size:
3.5" X 17"
Tire size:
120/70-17
Wheels and tires / rear wheel
Type:
Cast aluminum wheel
Rim size:
5.5" X 17"
Tire size:
180/55-17
Fork -
Settings
Spring base:
1 of 4 rings visible
Suspension strut
Settings
Rebound stage:
Position 2 of 4
Spring base:
Position 4 of 7
Page 14 of 42
Explanations of the Motorrad TestCenter test modules
C.1
Cornering / dry handling module
Cornering and dry handling were evaluated on the Bosch handling
course in Boxberg.
This course was used to simulate the typical riding situations
encountered on country roads.
On the handling course, the rider is seated in a sporty posture without
hanging off the motorcycle.
Here, selected test criteria such as steering characteristics, steering
forces and neutrality are evaluated on alternating bends.
All tests are recorded with a 2D system.
C.2
Cornering stability / adhesion module
Evaluation of the maximum adhesion is carried out on the test or race
track in sport riding mode
This course was used to simulate the typical riding situations
encountered on country roads.
On the handling course, the rider is seated in a sporty posture without
hanging off the motorcycle. Full lap times are not recorded for road
tires which are not intended for competition use.
The MTC creates opportunities for comparing adhesion and cornering
performance on defined sections of the track and in defined reference
corners.
Here, the speed, lean angle and steering angle are evaluated. The 2D
diagrams are created based on these recordings in order to support the
points evaluation with objective data.
Page 15 of 42
Explanations of the Motorrad TestCenter test modules
C.3
Wet adhesion/wet handling module
Evaluation of the handling and cornering characteristics in wet
conditions is performed on a continuously watered handling course.
The riders are seated in a sporty posture without hanging off the
motorcycle. Lap times are not recorded for road tires which are not
intended for competition use.
The MTC creates opportunities for comparing adhesion and cornering
performance on defined sections of the track and in defined reference
corners.
Here, the speed, lean angle and steering angle are evaluated. The 2D
diagrams are created based on these recordings in order to support the
points evaluation with objective data.
Friction coefficient – as stated by track operator: 0,44 – 0,47 µ
C.4
Freeway / high-speed stability module
High-speed stability is tested on a section of the freeway without a
speed limit.
At maximum speed, the tire is confronted by a range of different
surfaces - normal road surface, damaged asphalt layer, bridge grooves
and road bumps.
The section of freeway selected for this test (A 81 Boxberg-Möckmühl)
features a perfect mixture of surface conditions for this purpose.
Page 16 of 42
Module: Cornering / dry handling
D.1
Bridgestone Battlax BT 023
Positives /
+
o Very low steering force required during constant cornering,
motorcycle requires almost no force input and remains stable
o Completely neutral, very precise steering characteristics when
cornering in a sporty style at lean angles of up to 44 degrees
(neutral lean angle) and when rapidly changing lean angle
o Good to very good adhesion at lean angles
o Good adhesion when accelerating out of curves
o Good to very good steering precision when entering and exiting
corners
o Good to very good cornering stability with a single rider
o Good stability when accelerating out of curves
o Good to satisfactory handling in all speed ranges
o Good ride comfort and high self-damping
o Completely safe, stable handling characteristics on the freeway
test section with extremely uneven and bumpy road surface,
even when excited by steering actions
Page 17 of 42
D.2
Negatives /
-
o Noticeable righting moment when braking on a lean of approx.
32 degrees (neutral lean angle)
o With passenger, cornering stability is merely satisfactory due to
slight wobbling during lean angle changes and during excitation
from steering actions on a lean
o Requires greater steering force for lean angle changes compared
to Avon Storm
Page 18 of 42
D.3
Avon Storm
Positives /
+
o Very low steering force required during constant cornering
o Good to satisfactory adhesion at lean angles
o Satisfactory adhesion when accelerating out of curves
o Good to satisfactory steering precision when entering and exiting
corners
o Good to satisfactory cornering stability with single rider
o Good stability when accelerating out of curves
o Good to very good handling in all speed ranges
o Slight righting moment when braking on a lean of approx. 32
degrees (neutral lean angle)
Page 19 of 42
D.4
Avon Storm
Positives /
+
o Neutral, precise steering characteristics in curves up to lean
angle of approx. 32 degrees and when changing lean angle on
country roads
o Good ride comfort and high self-damping
o Sufficiently safe, stable handling characteristics on the freeway
Negatives /
-
o Occasional significant shimmy, including in corners, especially
with tires cold
o At a sporty pace and at lean angles from 40 degrees, slightly
wobbly steering and handling characteristics which have to be
stabilized with targeted steering actions towards the inside of the
corner
Page 20 of 42
D.5
Nankang Roadiac Version 2011
Positives /
+
o Low steering force required during constant cornering
o Neutral, precise steering characteristics when cornering in a
sporty style at lean angles of up to 44 degrees (neutral lean
angle) and when rapidly changing lean angle
o Good adhesion at lean angles
o Good adhesion when accelerating out of curves
o Good steering precision when entering and exiting corners
o Good cornering stability with single rider
o Good to satisfactory stability when accelerating out of curves
o Good to very good cornering stability with passenger
o Completely safe, stable handling characteristics on the freeway
Negatives /
-
o Merely sufficient ride comfort and low self-damping on the rough
road section
o Handling only just satisfactory in alternating curves and when
steering
Page 21 of 42
Module: Handling characteristics in wet conditions
D.6
Positives /
o
+
Good adhesion when cornering
o Good to very good adhesion when accelerating out of curves
o Good to very good steering precision when steering and in
alternating curves
o Forgiving, easily controllable adhesion limit range with smooth
transition from adhesion to slip
o Subjectively very safe, easy to handle tire with good grip balance
o Very safe feeling during transition from wet to dry track with
good grip
Page 22 of 42
D.7
Avon Storm
Positives /
+
o Easy to handle during steering and in alternating curves
o Relatively forgiving adhesion limit range in curves/at lean angles
o Significant excess grip (grip balance) on front wheel
o Acceptable cornering during transition from wet to dry track
section
Negatives /
-
o Significantly less grip than Bridgestone BT 23
o Rear wheel starts to slip early during acceleration
Page 23 of 42
D.8
Nankang Roadiac Version 2011
Positives /
o
+
Good steering precision during steering and in alternating curves
o Satisfactory adhesion when cornering
o Good to satisfactory adhesion during acceleration
Negatives /
-
o Less grip than Bridgestone BT 23
o Significant steering force required to keep the motorcycle on a
tight cornering line
o
Transition from adhesion to slip is somewhat abrupt
o Of particular note: unsafe cornering with slight slip at both
wheels during transition from wet to dry track
Page 24 of 42
O
Observati
ion
The sepa
T
aration of
o the running su
urface at
a the joint which
occurred on the old 2010
0 tire ve
ersion (s
see photto) did not
n
w specification.
occur on the new
01: Nank
kang rea
ar tire version 2010
2
Picture_0
Source:
S
MTC
Ord
der number:A_11_
_Delticom_04_reiff_02
Page 25 off 42
This report is on
nly intended for distribution
d
in its entirety and may
m
not be reprod
duced in parts w
without agreemen
nt in writing
© 2011 – Motorrrad TestCenter, Leuschnerstrasse
L
1,
1 70174 Stuttgartt, Telephone: 0711
1-182 1862
Eng
glisch_Prüfbericht_
_11_Delticom_04_
_reif_02_B.docx / 17.06.2011
Page 26 of 42
Module: Cornering - Bosch Test Center Boxberg
Max.
points
Item Criteria
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Cornering
Stability in corners
Steering precision, steering characteristics
Steering neutrality on a lean
Force requirement on a lean
Line holding during acceleration
Ease of handling
Stability during accel./wobbling
Lateral adhesion on lean, front
Lateral adhesion on lean, rear
Front to rear grip balance
Lateral adhesion limits
Lateral adhesion/traction during acceleration
Behavior at adhesion limits during acceleration
Feedback on lean, front
Feedback on lean, rear
Cornering stability with passenger
Subtotal for cornering:
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
320
Bridgestone
Nankang
Avon
Nankang
BT 023
Roadiac H2
Version 2010
Storm
Roadiac
H6/H4
Version 2011
18
17
18
18
17
16
16
19
18
16
18
17
17
18
19
12
274
14
15
14
15
14
16
12
17
15
16
16
14
16
15
16
xx
225
16
17
16
17
15
17
14
17
14
17
15
15
17
16
18
14
255
17
16
17
17
15
15
15
18
17
16
16
16
17
16
17
18
263
xx = Value on this test ground is not available. Total sum cannot be compared.
Page 27 of 42
This report is only intended for distribution in its entirety and may not be reproduced in parts without agreement in writing from Motorrad TestCenter
Module: Braking characteristics – Bosch Test Center Boxberg
Max.
points
Item Criteria
B
B1
B2
Braking characteristics
Righting moment in corners
Tilting moment when steering/releasing brake
Subtotal for braking characteristics:
20
20
40
Bridgestone
Nankang
Avon
Nankang
BT 023
Roadiac H2
Version 2010
Storm
Roadiac
H6/H4
Version 2011
15
17
32
14
15
29
16
16
32
16
16
32
Page 28 of 42
Module: Cornering / braking characteristics – Bosch Test Center Boxberg - Test conditions
Date
Time
Bridgestone
Nankang
Avon
Nankang
BT 023
Roadiac H2
Version 2010
Storm
Roadiac
H6/H4
Version 2011
11.05.2011
02.09.2010
11.05.2011
11.05.2011
22
20.6
23
21
32
41.7
37
28
1018
1008
1018
1018
50
47
43
51
2.5/2.9
2.5/2.9
2.5/2.9
2.5/2.9
44/52
55/65
51/56
42/50
2.7/3.4
-
2.8/3.3
2.8/3.4
Test conditions / unit
Ambient temperature / degrees centigrade
Asphalt temperature / degrees centigrade
Atmospheric air pressure (relative) / h/PA
Air humidity (relative) %
Tire pressure when cold F/R / bar
Tire temperature F/R / degrees centigrade *
Tire pressure when hot *
Mileage driven according to trip odometer /
km
* Measurement performed with an infrared thermometer on the
left-hand side of the tire, immediately after entering pits
Page 29 of 42
Module: Freeway / high-speed stability
Item Criteria
C
C
C
C
C
C
Bridgestone
Avon
Nankang
BT 023
Storm
Roadiac
H6/H4
Version 2011
20
20
20
20
20
20
19
18
19
18
19
19
17
18
19
16
19
19
19
18
19
18
19
19
120
112
108
112
Max.
points
C
Handling characteristics / safety / high speed
1
2
3
4
5
6
Shimmy
Sensitivity to longitudinal grooves
Wobble about steering axis without excitation
Wobble about steering axis with excitation
Kickback
High speed shimmy
Subtotal for high-speed stability:
Page 30 of 42
Module: Freeway / high-speed stability - Test conditions
Date
Bridgestone
Avon
Nankang
BT 023
Storm
Roadiac
H6/H4
Version 2011
11.05.2011
11.05.2011
11.05.2011
22
32
1018
50
2.5/2.9
44/52
2.7/3.4
22
32
1018
50
2.5/2.9
51/56
2.8/3.3
22
32
1018
50
2.5/2.9
42/50
2.8/3.4
Time
Tire pressure when hot *
* Measurement performed with an infrared thermometer on
the left-hand side of the tire, immediately after exiting the
freeway
Page 31 of 42
Module: Handling characteristics in wet conditions – automotive testing papenburg - Papenburg
Max.
points
Item Criteria
D
D
D
D
D
D
D
D
D
1
2
3
4
5
6
7
8
Handling characteristics in wet conditions
Steering precision
Line holding during acceleration
Ease of handling
Adhesion on lean, front
Adhesion on lean, rear
Adhesion during acceleration
Behavior at adhesion limits
Feedback on lean
Subtotal for handling characteristics in wet conditions:
20
20
20
20
20
20
20
20
160
Bridgestone
Avon
Nankang
BT 023
Storm
Roadiac
H6/H4
Version 2011
17
17
16
17
17
18
16
16
134
13
12
14
12
11
12
16
15
105
13
14
12
13
14
15
14
15
110
Page 32 of 42
Module: Handling characteristics in wet conditions – automotive testing papenburg - Papenburg - Test conditions
Date
Time
Bridgestone
Avon
Nankang
BT 023
Storm
Roadiac
H6/H4
Version 2011
13.05.2011
13.05.2011
13.05.2011
22
18
1055
43%
2.5/2.9 bar
34/30
19
19
1055
43%
2.5/2.9 bar
33/32
20
19
1056
50%
2.5/2.9 bar
34/33
* Measurement performed with an infrared thermometer on the left-hand side
of the tire, immediately after entering pits
Page 33 of 42
Total score
Max.
points
Item Criteria
A
Subtotal for cornering:
Bridgestone
Avon
Nankang
BT 023
Storm
320
274
255
Roadiac
H6/H4
Version
2011
263
40
32
32
32
B
Subtotal for braking characteristics:
C
Subtotal for high-speed stability:
120
112
108
112
C
Handling characteristics / safety / high speed:
160
134
105
110
640
552
500
517
Total score:
Page 34 of 42
Sections of test track at Bosch Test Center Boxberg - Track diagram
Page 35 of 42
Evaluation of the test tires - Measurement values
Sections of test track at Bosch Test Center Boxberg - Measurement values
Tire model
Bridgestone
Section_1 / S-bends
Section_2 / Omega
Section_3 / Home bend
Time in sec.
Time in sec.
Time in sec.
17.10
8.60
11.73
17.30
8.64
11.61
17.70
8.99
12.15
BT 023
Nankang
Roadiac H6/H4 Version 2011
Avon
Storm
Page 36 of 42
Evaluation of the test tires - Measurement values
Steering angle in corner
Steering movement – tire: H2
Continuous movement.
Steering movement – tire: H4
Uniformly steady.
Page 37 of 42
Test track – ATP Papenburg – Track diagram
Page 38 of 42
Test track – ATP Papenburg – Measurement values
Tire model
Section_1/ Omega 1
Section_2 / S-bends
Section_3 / Omega 2
Time in sec.
Time in sec.
Time in sec.
Bridgestone
12.23
17.30
12.21
BT 023
V-bend: 42.3 km/h Lean:
26,6°
Nankang
13.11
18.80
13.16
Roadiac Version 2011
24,97°
Avon
13.75
19.90
14.15
Storm
22.7°
Page 39 of 42
D.2
Data recording
The GPS data recorded are on a CD still to be supplied by MTC.
Page 40 of 42
Conclusion
During the two days of testing, it was found that the new specification
of the Roadiac radial tire from Nankang represented a significant
improvement in terms of cornering stability, particularly at the front
wheel.
During the dry testing, it achieved almost the same cornering speeds
and section times as the BT 023 from Bridgestone.
Compared to the Bridgestone BT 023 pairing, the only improvements
the Roadiac tire needs are better handling and slightly greater stability
at extreme leans of over 40 degrees (neutral lean angle).
The merely sufficient shock absorption and self-damping at the high
standard air pressure of 2.5/2.9 bar remained unchanged.
However, the standard air pressure of 2.5/2.9 bar does not have a
negative impact on driving stability on the rough road and high-speed
sections.
Of particular note are the flawless, safe handling characteristics of the
Roadiac at top speed and the very stable cornering with a passenger.
During the wet testing the Roadiac surpassed the Avon Storm, both in
the points rating and in the section times, but was significantly inferior
to the Bridgestone BT 23 - although without any safety-relevant
defects or handling characteristics.
Page 41 of 42
This test report was authored by Werner Koch and Gerhard Wagner,
employees of Motorrad TestCenter.
Persons present during testing:
Motorrad TestCenter
Mr. Werner Koch
Mr. Gerhard Wagner
Stuttgart - 17.06.2011
_______________
Werner Koch
Technical Manager/Road Testing
_______________
Gerhard Wagner
Engineering/Road Testing
Page 42 of 42

Here is the full report for the Nankang Roadiac from the motorcycle

Transcription

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