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If you’ve not heard of them before, a “tweel” is a relatively new approach to tires. The rimless, airless tire is built around thick vanes which rigidly hold their shape and support a vehicle’s weight without the need for inflation. Though they differ greatly from standard inflatable tires, these rubber ‘tweels’ still need to be retreaded from time to time, but the process takes much more skilled work than a standard tire as you’ll see in this breakdown.