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Wheel with outer rim is a new tire technology minimizing rubber material in order to save the cost of vehicle maintenance cost. With this modern wheel technology the rim size is kept to the smallest diameter possible, leaving the space for break drum and axle accommodation.
Then there will be a large space remaining between the required wheel diameter and the modified rim diameter, so that, the small size tire is placed over the rim. The remaining space is occupied by a reinforced hoop member with its outer periphery enclosed by a tread belt.