Geely EC718, EC718RV, EC715, EC715RV. Manual part — 281

4.4 Wheels and Tires

4.4.1 Specifications
4.4.1.1 Fastener Tightening Specifications

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Wheel Nut

M12

100-120

74-89

4.4.1.2 Tire Specifications

Specifications

205/65R15-94H
215/55R16-93V

Cold Pressure (Front / Rear)

210/200 kPa (Metric)

30/29 psi (US English)

Rim

15 × 6.5 J, 16 × 7 J

Tire Pressure Conversion Table

kPa

psi

kPa

psi

kPa

psi

140

20

185

27

235

34

145

21

190

28

240

35

155

22

200

29

250

36

160

23

205

30

275

40

165

24

215

31

310

45

170

25

220

32

345

50

180

26

230

33

380

55

4.4.1.3

Front

Suspension

Positioning

Specifications

Note

The following parameters refer to the whole vehicle
technical parameters.

Maximum Front Corner

Left Internal / External

40 ± 2° / 33.8 ± 2°

Right Internal / External

40 ± 2° / 33.8 ± 2°

Camber

0°± 45'

Kingpin Inclination

12°

7' ± 45'

Caster

2°

33' ± 45'

Front Wheel Toe

0°± 13'

Suspension System

Wheels and Tires

4-53

Front Tread

1,502 ± 10 mm / 59 ± 0.39 in

4.4.1.4

Rear

Suspension

Positioning

Specifications

Note

The following parameters refer to the whole vehicle
technical parameters.

Rear Wheel Toe

4' ± 30 '

Rear Camber

- 44 ' ± 30'

Rear Tread

1,492 mm / 58.7 in (Hatchback)

1,483 mm / 58.4 in (Sedan)

Wheelbase

2,620 mm / 103 in

4-54

Wheels and Tires

Suspension System

4.4.2 Description and Operation
4.4.2.1 Tire Structure

4

3

3

6

2

5

7

1

FE04-1008b

1. Tread

The tread is the tire and road surface contacting part. Through
the friction it enables the vehicle driving, braking and
performances. It should have good wear resistance, puncture
resistance, impact resistance and heat dissipation properties.

2. Carcass

The main part that supports the load. It should have good
impact resistance and good resistance to flex.

3. Belt

The steel cord between the tread and the carcass that protects
matrix, it prevents the tread deformation, maintains the contact
with the ground, improves wear resistance and driving stability.

4. Cap Ply

A special ply on top of the belt, it prevents the belt from moving,
prevents the belt detached at high speeds and maintains the
tire size at high speeds.

5. Bead

Hanging plastic wire winding according to a certain shape
(square or hexagonal shape), it fixes the tire on the rim.

6. Triangle Strips

The filling material on the steel cord, it prevents the bead
spread and slows down the impact on the bead and prevents
the air entering into the molding.

7. Inner Liner

Component that maintains the air tightness in a tubeless tire,
made from special rubber, equivalent to the role of tube.

4.4.2.2 Tire Sidewall Mark Meaning and the
Pressure Instructions

Tire Sidewall Mark Meaning

Example: 205/60R15 91V

205 - Nominal Cross-section Width (Unit: mm)

60 - Flat Rate (High Aspect Ratio :%)

R - Radial Structure

15 - Nominal Rim Diameter (Unit: in)

91 - Load Index

V - Speed (240 km/h)

Common Speed Rating Table:

Speed Rating

Maximum Speed (km/h)

S

180

T

190

H

210

V

240

W

270

Y

300

ZR

240 or higher

Tire Pressure Instructions

Tire pressure has a decisive influence on the tire wear, fuel
consumption, fault and damage. For safety, driver must
maintain standard tire pressure and regularly check the tire
pressure.

–

The tire load capacity is corresponding to the tire inflation
pressure, which must be adjusted to a reasonable value
based on the vehicle load conditions.Climate and seasonal
changes should not be a reason for the tire pressure
adjustment.

–

During the initial use, a new tire outer sizes will change due
to the heated generated by flex, making tire pressure
reduced. After driving 24 hours or 2,000-3,000 km, check
and adjust the tire pressure.

–

Long time high-speed driving will increase tire pressure by
10% -15%.

1. Insufficient Tire Pressure

Suspension System

Wheels and Tires

4-55

Insufficient tire pressure will accelerate tire sidewall
deformation, increase heat, dramatically reduce tire life, and
cause the following issues as well as security risks:

a. Excessive shoulder wear

b. Increased possibility of tire protrusion.

c. Reduce the adhesion between the various components

leading to de-lamination.

d. Tire sidewall damage.

e. Tire run out too great, resulting in bead rim between

abnormal friction between the rim and the tire and rim
damage.

f. Increased rolling resistance and fuel consumption.

2. Excessive Tire Pressure

Excessive tire pressure will reduce the tire tread and ground
contacting area, increase tire stiffness, decrease the buffer,
and cause the following issues as well as security risks:

a. Tire central tread excessive wear.

b. Increased possibility of tire rupture and puncture under

external shocks.

c. Reduced maneuverability due to reduced ground

contacting area, prone to tail-flick, slide.

d. Reduced ride comfort.

e. Reduced smoothness. Long-term driving under excessive

tire pressure will damage the vehicle chassis.

3. Uneven Tire Pressure On the Same Suspension:

a. Uneven braking force.

b. Steering deviation.

c. Reduced maneuverability.

d. Deviation when accelerating.

e. Deviation when driving.

4.4.2.3 Tire Transposition

Front and rear tires wear will be different due to different load.
In order to avoid the single direction tires wear and tear, regular
tire transposition will make tires wear even, extending tire life.
It is recommended that rotate tires every 5,000-8,000 km. The
main purposes of tire transposition are:

A. Ensure even tire wear, fatigue, stability and fuel economy.

B. Check tire conditions during tire transposition, regularly

check for damage to prevent accidents.

Tire Transposition Method as Shown:

Transposition with A Spare Tire

4-56

Wheels and Tires

Suspension System