Wheels and Tires
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R Wheels and tires GENERALWheels and tires INFORMATION Tire markings 3 4 5 6 2 7 8 1 9 15 10 14 13 11 12 JAG1525 1. P indicates that the tire is for passenger 8. US DOT Tire Identification Number (TIN). vehicle use. This begins with the letters DOT and 2. The width of the tire from sidewall edge to indicates that the tire meets all federal sidewall edge in millimetres. standards. The next two numbers or letters are the plant code where it was 3. The aspect ratio, also known as the profile, manufactured, the last four numbers are gives the sidewall height as a percentage the date of manufacture. For example, if of the tread width. So, if the tread width is the number was 3106, the tire was made in 205 mm, and the aspect ratio is 50, the the 31st week of 2006. The other numbers sidewall height will be 102 mm. are marketing codes used at the 4. R indicates that the tire is of Radial ply manufacturer's discretion. This construction. information can be used to contact 5. The diameter of the wheel rim given in consumers if a tire defect requires a recall. inches. 9. M+S or M/S indicates that the tire has been 6. The load index for the tire. This index is not designed with some capability for mud and always shown. snow. 7. The speed rating denotes the maximum speed at which the tire should be used for extended periods.† 195 L Wheels and tires 10. The number of plies in both the tread area, TIRE CARE and the sidewall area, indicates how many layers of rubber coated material make up WARNINGS the structure of the tire. Information is also Defective tires are dangerous. Do not provided on the type of materials used. drive the vehicle if a tire is damaged, 11. Wear rate indicator. A tire rated at 400 for excessively worn, or incorrectly example, will last twice as long as a tire inflated. Doing so may lead to premature tire rated at 200. failure. 12. The traction rating grades a tire’s Avoid contaminating the tires with performance when stopping on a wet road vehicle fluids, as they may cause surface. The higher the grade, the better damage to the tire. the braking performance. The grades from Avoid spinning the wheels. The forces highest to lowest are: AA, A, B and C. released, can damage the structure of 13. The maximum load which can be carried the tire and cause it to fail. Doing so, by the tire. may lead to premature tire failure. 14. Heat resistance grading. The tires If wheel spin is unavoidable due to resistance to heat is grade A, B or C, with loss of traction (in deep snow, for A indicating the greatest resistance to heat. example), do not exceed the 50 km/h This grading is provided for a correctly (30 mph) point on the speedometer. Doing so inflated tire, which is being used within its may lead to premature tire failure. speed and loading limits. Do not exceed the maximum pressure 15. The maximum inflation pressure for the stated on the sidewall of the tire. tire. This pressure should not be used for Over-inflation could cause the tire to normal driving. fail suddenly. † All of the vehicle's tires (including the spare) Speed ratings should be checked regularly for damage, wear Rating Speed km/h (mph) and distortion. If you are in any doubt about the condition of a tire, have it checked immediately Q 160 (99) by a tire repair center, or your Jaguar Dealer. R 170 (106) S 180 (112) T 190 (118) U 200 (124) H 210 (130) V 240 (149) W 270 (168) Y 300 (186) 196 R Wheels and tires Tire pressures Tire pressure label - Canada and Mexico only WARNINGS Never drive your vehicle if the tire pressures are incorrect. Under-inflation causes flexing and uneven tire wear. This can lead to sudden tire failure. Over-inflation causes a harsh ride, uneven tire wear and poor handling. Pressure checks should only be carried out when the tires are cold and the vehicle has been stationary for more than three hours. A hot tire, at or below E91695 recommended cold inflation pressure, is dangerously under-inflated. The recommended tire pressures are listed on a placard label fixed to the end of the left-hand If the vehicle has been parked in side door. These pressures provide optimum strong sunlight or used in high ride and handling characteristics for all normal ambient temperatures, do not reduce operating conditions. the tire pressures. Move the vehicle into the shade and allow the tires to cool before re-checking the pressures. Never exceed the maximum pressure stated on the sidewall. Over-inflation could cause the tire to fail suddenly. 197 L Wheels and tires Tire pressure label - USA only 1 2 3 TIRE AND LOADING INFORMATION SEATING CAPACITY TOTAL 4 FRONT 2 REAR 2 The combined weight of occupants and cargo should never exceed XXXkg or XXXXlbs 4 TIRE SIZE COLD TIRE INFLATION PRESSURE SEE OWNER'S FRONT XXX/XXRXX XXPSI XXXkpa MANUAL FOR ADDITIONAL REAR XXX/XXRXX XXPSI XXXkpa INFORMATION RTC500490 SPARE TXXX/XXRXX XXPSI XXXkpa 6 5 E93881 A tire information label is visible on the pillar The label contains the following information: behind the driver’s door (where shown), giving • The maximum number of occupants (1), information specific to the original wheel and divided between the front (2) and rear (3) tire equipment fitted to the vehicle. of the vehicle. These pressures provide optimum ride and • The vehicle capacity weight (4), which handling characteristics for all normal includes the weight of the driver, operating conditions. passengers and cargo. • Cold inflation pressures for the front, rear and spare tire (5). • The size of the tires (6) with which the vehicle was originally equipped. Note: The label must not be changed, even if different wheels are fitted at a later stage. 198 R Wheels and tires Recommended tire pressures This table gives the tire pressures for all recommended tire sizes Tire size/fitment Tire pressures Bar lbf/in2 (psi) kPa Front 245/40ZR19 94Y 2.1 30 210 255/35ZR20 97Y 2.1 30 210 245/40R19 94Y 2.1 30 210 Rear 275/35ZR19 96Y 2.3 33 230 285/30ZR20 99Y 2.3 33 230 275/35R19 96Y 2.3 33 230 Temporary use spare wheel 4.2 60 420 (front and rear) Checking the tire pressures If tire pressures are checked while the vehicle is inside a protected covered area (e.g. a WARNINGS garage) and subsequently driven in lower Tire pressures should be checked outdoor temperatures, tire under-inflation regularly using an accurate pressure could occur. gauge, when the tires are cold. Failure A slight pressure loss occurs naturally with to properly maintain your tire pressures could time. If this exceeds 0.14 bar (2 lbf/in², 14 kPa,) increase the risk of tire failure resulting in loss per week, have the cause investigated and of vehicle control and personal injury. rectified by qualified assistance. Note: If winter tires are fitted, please refer to If it is necessary to check tire pressures when the winter tire pressure information. See the tires are warm, pressures should be USING WINTER TIRES (page 204). expected to have increased by up to 30 - 40 kPa In the interest of safety, reliability and fuel (0.3 - 0.4 bar)(4 - 6 lbf/in2). Do not reduce the efficiency, check the tires, including the spare, tire pressures to the cold inflation pressure for condition and pressure on a weekly basis under these circumstances. Allow the tires to and before long journeys. cool fully before adjusting the pressures. Do not check tire pressures immediately after The following procedure should be used to the vehicle has travelled in excess of 1.6 km check and adjust tire pressures. (1 mile). Tire temperatures and pressures 1. Remove the valve cap. increase when running. Deflating a warm tire to 2. Firmly attach a tire pressure gauge/inflator the recommended pressure will result in to the valve. under-inflation. 3. Read the tire pressure from the gauge and add air if required. 199 L Wheels and tires 4. If air is added to the tire, remove the gauge Pressure compensation for ambient and re-attach it before reading the temperature changes pressure. Failure to do so may result in an If the intended journey will take the vehicle into inaccurate reading. an area where the ambient local temperature is 5. If the tire pressure is too high, remove the known to be lower than the journey start point, gauge and allow air out of the tire by tire pressure under-inflation could occur. pressing the center of the valve. Refit the gauge to the valve and check the pressure. 6. Repeat the process, adding or removing air as required, until the correct tire pressure is reached. 7. Refit the valve cap. Note: It is an offence in certain countries to drive a vehicle with incorrect tire pressures. Note: It is the driver’s responsibility to ensure that the tire pressures are correct. Tire valves Keep the valve caps screwed down firmly, to E91696 prevent water or dirt entering the valve. Check A colder ambient local temperature will reduce the valves for leaks when checking the tire pressure within the tire. An effect is to decrease pressures. sidewall height and to increase tire shoulder wear with the potential for tire failure. Vehicle dynamics could also be adversely affected.