Automobile Engineering in ME
In radial tyres

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

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Automobile Engineering in ME
The rigid suspension is beneficial when

It is desired to improve tyre to ground contact characteristics
It is desired to reduce the unsprung mass
It is desired to have more flexibility in design
Large changes in load make it necessary to have a large suspension stroke

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