Automobile Engineering in ME
The ball joints are used on the tie rod ends, because they

Reduce the amount of noise generated
Can deal with movement of the suspension both vertically and in other directions
Reduce the amount of sliding resistance
Improve the force transmission speed

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Automobile Engineering in ME
In radial tyres

All plies run parallel to one another and vertical to tyre bead
Inner tubes are always used
One ply layer runs diagonally one way and another layer runs diagonally the other way
None of these

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