GM Service Manual Online
For 1990-2009 cars only
Table 1: Inflation Pressure Conversion
Table 2: Common Speed Ratings

Inflation Pressure Conversion

Kilopascals to PSI

kPa

psi

kPa

psi

140

20

215

31

145

21

220

32

155

22

230

33

160

23

235

34

165

24

240

35

170

25

250

36

180

26

275

40

185

27

310

45

190

28

345

50

200

29

380

55

205

30

415

60

Conversion: 6.9 kPa = 1 psi

Common Speed Ratings

Speed Symbol

Maximum Speed (km/h)

Maximum Speed (mph)

S

180

112

T

190

118

U

200

124

H

210

129

V

240

149

Z

Over 240

Over 149