The tyre being used currently should be replaced with a new tyre when the tread wear indicator (1.6mm height) is exposed.
Inflation Pressure Maintenance
Always maintain proper wheel alignment. Wheel alignment should be done after every 5,000 kms. or whenever any irregular wear on tyre is found.
Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. Suspension systems must support both roadholding/handling and ride quality, which are at odds with each other. The tuning of suspensions involves finding the right compromise.