The adapters are manufactured out of 1-5/8″ (outside diameter) steel. These adapters accommodate all fittings for 1-1/4″ and 1-1/2″ pipe. These wheels are perfect for a quick Speed-Rail® rig that requires movement or for creating your own rickshaw or Speed-Rail® dolly. The Speed-Wheels feature a strong and durable locking mechanism, ensuring ease of use.
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