SUSPENSION 43 MATCHED TYRES AND WHEELS: Tyres and wheels are match mounted at the assembly plant. This means that the radially stiffest part of the tyre or “high spot” marked in RED on tyre is matched to the smallest radius or “low spot” of the steel wheel rim. In case of alloy rims valve is to be matched with YELLOW spot on the tyre. The YELLOW spot is an indication of low point of static imbalance of tyres. This is done to provide the smoothest possible ride. The color spots on the tyres are originally marked by paint dot on the out board sidewall. This paint dot will eventually get wash off the tyre. The “low spot” of the wheel is originally marked by paint dot on the wheel rim. If properly assembled, the wheel rims’ paint dot should be aligned with the tyres’ paint dot. Whenever a tyre is dismounted from its wheel it should be remounted so that the tyre and wheel are matched. If the tyre’s paint dot cannot be located, a line should be marked on the tyre and wheel before dismounting to assure that it is remounted in the same position. 1.10.2. INFLATION OF TYRES: The pressure recommended for any model is carefully calculated to give a satisfactory ride, stability, steering tread wear, tyre life and resistance to bruises. Tyre pressure with tyres cold, (after vehicle set for three hours or more or driven less than one mile) should be checked monthly or before any extended trip. It is normal for tyre pressure to increase (0.28 bars, 4 psi) when the tyres become hot during driving. Do not bleed or reduce tyre pressure after driving. Bleeding reduces the “Cold inflation Pressure”. Recommended tyre pressures are: (For 215/60 R16) Front: 30 psi. Rear: 30 psi (For 195/60 R16) Front: 32 psi Rear: 32 psi In case of temporary spare wheel, tyre pressure of temporary tyre should be 35 psi Higher than recommended pressure can cause: 1. Hard ride 2. Tyre brushing or carcass damage 3. Rapid tread wear at center of tyre Unequal pressure on same axle can cause: 1. Uneven braking 2. Vehicle pull 3. Reduced handling 4. Swerve on acceleration Valve caps should be on the valves to keep dust and water out. Lower than recommended pressure can cause: 1. Tyre squeals on turns. 2. Hard steering 3. Rapid and uneven wear on the edges of the tread 4. Tyre rim bruises and rupture 5. Tyre cord breakage 6. High tyre temperature 7. Reduced handling 8. High fuel consumption
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