This vehicle has been engineered to operate up to the stated load capacity with wheel and tyre assemblies of the type, size, construction, and configuration as originally installed. Maintenance of the tyre inflation pressures is critical to the continued satisfactory performance, handling, and operating economy of the vehicle.
Operating the vehicle with incorrectly inflated tyres can adversely affect vehicle performance and may contribute to the following:
• | Reduced fuel economy |
• | Tyre overloading |
• | Reduced tyre life |
• | Excessive tyre wear |
• | Uneven tyre wear |
• | Vehicle handling concerns |
Inspect the tyre pressures when the vehicle has not been driven for at least 3 hours or not more than 1.6 km (1 mi) and when the tyres are cool to the touch.
Replace any missing or damaged tyre valve stem extensions and/or caps to prevent the intrusion of water and contaminates.
One pound per square inch (psi) equals 6.9 kilopascals (kPa). The following table illustrates the conversion of kilopascals to pounds per square inch:
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 |
For the correct inflation pressures refer to the vehicle's tyre placard.
Tyres inflated to a higher than recommended pressure can contribute to the following conditions:
• | A hard ride |
• | Tyre bruising |
• | Rapid tread wear at the center of the tyre |
Tyres inflated to a lower than recommended pressure can contribute to the following conditions:
• | Tyre squeal on turns |
• | Hard steering |
• | Rapid and/or uneven wear on the outer edges of the tread |
• | Tyre rim bruises and tyre rim rupture |
• | Tyre cord breakage |
• | High tyre temperatures |
• | Sluggish vehicle handling |
• | Higher fuel consumption |
Unequal pressure on the same axle can cause the following conditions:
• | Uneven braking action |
• | Steering lead |
• | Imprecise vehicle handling |