TÜV SÜD report Vector Seasons

TÜV SÜD Automotive GmbH

Tire Performance Benchmark Of All Season Tires

175/65 R14 82T

Abstract of Test Report No. 76230122/2

TÜV SÜD Automotive GmbH • TÜV SÜD Group

Project

Description

TÜV SÜD Automotive

Objective

The objective of this project was, to benchmark the performance

of 175/65 R14 82T passenger car all season tires of different

makes against each other with special regards to their safety on:

Snow surface Ice surface Wet surface


Scope


Safety on snow-covered surfaces

Subjective assessment of ride and handling criteria and timed laps

on a snow-covered handling circuit

Measurement of braking distance from 50-10 kph (ABS braking) Braking

Handling

AccelerationMeasurement of acceleration time from 5-30 kph with electronic

traction control (ETC) switched on


Scope


Safety on icy surfaces

Measurement of lap times on an icy circular test track driving at

constant speed at the stability limits with electronic stability

systems (ESP) switched off

Measurement of braking distance from 20-8 kph (ABS braking) Braking

Lateral Grip

AccelerationMeasurement of acceleration time from 8-16 kph with electronic

traction control (ETC) switched off


Scope


Safety on wet roads

Subjective assessment of ride and handling criteria and timed laps on

an artificially wetted handling circuit

Measurement of the transmittable lateral forces when cornering

through a water basin

Measurement of the aquaplaning speed at 15% slip in a water basin

of 9 mm water depth

Measurement of braking distance from 80-20 kph (ABS braking) on:

- wetted asphalt (low µ)

- wetted asphalt (high µ)

Braking

Handling

Aquaplaning

curved

Aquaplaning

longitudinal


Test Population


All season tires 175/65R14 82T

Manufacturer

Hankook

Goodyear

Vredestein

Control tire: Goodyear Vector 4Seasons

Vector 4Seasons

Centum H 720

Quatrac 2

Commercial name Tread design


Test Vehicles


The tests were performed with

three differently equipped test vehicles

specified as follows:

VOLKSWAGEN POLO Mk IV

Body 5-door saloon

(Picture exemplarily)

Gearbox 5-speed manual transmission

Drive concept front

Snow performance (1.4 TDI):

Engine type 3 cyl. 1.4l turbo diesel engine, direct injection

Max. Engine power 51 kW / 4000 min-1

Max. Speed 164 kph

Max. Engine torque 155 Nm / 1600 min-1

Max. Permissible weight 1650 kg

Ice performance (1.4 TDI, blue motion):



Max. Speed 176 kph



Wet performance (1.9 TDI):



Max. Speed 188 kph




Test DetailsPerformance


General Key Points

• Results show percent evaluation in comparison to the performance of

the Goodyear tire:

- value above 100 % = better

- value below 100 % = worse

• One tire make selected as control tire (except aquaplaning straight and

curved), re-tested at end of each complete sequence in order to

consider potential changes of test conditions, (e.g. temperature, test

track characteristics).


Test DetailsAquaplaning Long.


Key Points

Test vehicle equipped with GPS-based speed measuring device

and rotation wheel spin sensors on both front wheels

• Driving: Constant speed while running into a flooded water basin

(approximate water depth 9 mm) on one side of the car. The other side

still on dry asphalt.

• Aquaplaning longitudinal: Characterized by maximally reached

aquaplaning speed. Four valid runs in same gear.

• Test: Acceleration with full throttle when entering the water basin.

Speed and wheel spin are recorded. The corresponding vehicle speed

to a wheel spin difference of 15% represents the aquaplaning speed.


Test DetailsAquaplaning Curved


Key Points

Test vehicle equipped with GPS-based speed measuring

device and lateral acceleration sensor

• Driving: Constant speed & steering angle on dry asphalt circle with

an approx. 20 m water flooded segment.

• Aquaplaning in corners: Characterized by maximally transmittable

lateral acceleration as well as decreasing characteristics after

reaching the maximum (the flatter the gradient, the easier to control)

• Test: Lateral acceleration and speed recorded when vehicle enters the

flooded segment (triggered by light barrier). The vehicle speed is

increased run by run until clear decrease of lateral acceleration occurs.


Test DetailsAcceleration On Ice And

Snow-Covered Roads


Key Points

Test vehicle equipped with GPS-based speed measurement

device

• Driving: Vehicle is accelerated with full throttle on a straight test track.

On snow surface with traction control switched on, on ice off.

• Test: Acceleration time between determined initial and end speed is

recorded.

• Acceleration: Mean acceleration is calculated based on 8 values.


Test DetailsBraking on ice, wet and

snow-covered roads


Key Points

Test vehicle equipped with GPS-based speed measurement

device

• Driving: Deceleration with full pedal pressure on a straight test track

(ABS braking).

• Test: Braking distance between determined initial and end speed is

recorded.

• Deceleration: Mean deceleration is calculated based on 8 values.


Test DetailsLateral Ice Grip


Key Points

Test vehicle equipped with laptiming device

• Driving: Constant speed & steering angle on an iced circle within

the stability limits (excessive under- / oversteering is avoided).

• Test: Lap time is recorded.

• Lateral acceleration: The mean lateral acceleration is calculated based

on 8 values.


Test DetailsHandling on wet and

snow-covered roads


Key Points

• Driving: Test vehicle driven within its stability limits by experienced

test drivers on special handling circuits (ESP off / ABS on). Excessive

under- / oversteering is avoided (striving for maximum reproducibility)

• Test: Lap times are recorded. Handling & ride characteristics are

subjectively assessed.

• Handling characteristics: The driver evaluates the different performance

criteria using a 10-point scale where a 10 is the max. reachable mark. A

mean value is calculated thereof. The laptimes support the

reproducibility and a mean speed is generated of 3 valid runs.

Test vehicle equipped with laptiming device


Results

Snow Performance


Performance on snow-covered tracks

100,0%

100,0%

100,0%

95,0%

93,2%

96,5%

93,3%

97,6%

97,6%

80% 85% 90% 95% 100% 105%

Acceleration

Braking

Handling

Goodyear Vector 4Seasons

Hankook

Vredestein


Hankook

Vredestein


Hankook

Vredestein


Results

Ice Performance


Performance on icy tracks

100,0%

100,0%

100,0%

94,2%

89,0%

94,8%

94,7%

86,0%

103,0%

70% 75% 80% 85% 90% 95% 100% 105%

Acceleration

Braking

Lateral Grip


Hankook

Vredestein


Hankook

Vredestein


Hankook

Vredestein


Results

Wet Performance


Performance on artificially wetted tracks

100,0%

100,0%

100,0%

100,0%

100,0%

93,9%

94,8%

85,4%

91,0%

94,1%

94,3%

95,9%

96,5%

98,2%

97,6%

75% 80% 85% 90% 95% 100% 105%

Aquaplaning(straight)

Aquaplaning(curved)

Braking(low µ)

Braking(high µ)

Handling


Hankook

Vredestein


Hankook

Vredestein


Hankook

Vredestein


Hankook

Vredestein


Hankook

Vredestein

Date post:	28-Mar-2015
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