WHEELS AND TYRES 13 The wheel should always be balanced and aligned in order to provide: (a) Enhanced tyre life. (b) Driving safety and steering control (c) Better performance of the vehicle. Unbalanced tyre may lead to premature tyre wear and driver fatigue due to vibration. Tyres should always be balanced when: (a) They are mounted on wheels for the first time (b) When they are remounted after repair or (c) When there are signs of shimmy or vibrations. A vehicle is said to be properly aligned when all suspension and steering components are sound and when tyre and wheel assemblies are running straight and true. Proper alignment is necessary for even tread wear and precise steering. Uneven front or rear tyre wear can lead to misalignment. Following precautions should be taken while balancing wheel: Deposits of mud, dust etc. must be cleaned from inside of the rim. Remove stones from tread, clean the tyre and rim before balancing to achieve better results. Each tyre should be inspected for any damage. Do not use more than one balance weight on one side. Use coated weights on aluminum wheels/rims to prevent damage to the finish. The type of balance weights, when used, must be in accordance with the profile of the rim flange. NOTE For balancing wheel, follow the manufacturer’s (of balancing machine) manual for balancing instructions, recommendations and any other additional information. III. TYRE ROTATION To equalize wear rotate the tyres as per to the figure given below periodically. Tyre rotation is recommended for achieving identical wear on each tyre. Regular rotation of tyres will also prevent abnormal wear. The sketch indicates a suggested sequence of tyre rotation. Rotate tyre at a point specified in the service schedule. NOTE The tyre rotation should always be done including the spare wheel. Spare wheel can be excluded from rotation in the following conditions If the spare wheel is damaged and not recommended for normal use. If the spare wheel size is different from the normal tyres. WHEN SPARE WHEEL IS SAME AS VEHICLE WHEELS WHEN SPARE WHEEL IS DIFFERENT FROM VEHICLE WHEELS
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