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Car′riage-wheel.

This has usually a hub or nave, spokes, fellies, and tire. A box fitted in the hub runs in contact with the spindle or arm of the axle, and the wheel is held on the spindle by a linch-pin, nut, or other device.

Carriagewheels are variously constructed. In the usual form the radial spokes are planted in the hub and distend the rim. In the suspension-wheel, so called, the castiron hub and wrought-iron rim are connected by rods tightened by nuts.

The illustration gives several forms of the suspension-wheel. The upper figure has curved steel spokes, which provide in the wheels the spring or elasticity necessary for the vehicle.

The other figures show modes of securing the rims to the hubs by curved, crossed, or broad-based spokes. The run of improvement now is in the hubs and the modes of securing the spokes therein. See hub; spoke; felly.

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