Once on a group ride, a guy flatted the rear tire. When he pulled out his baggie with the spare tube, he had also stuffed in one of those thin latex medical gloves. He put the glove on his right hand and always used that hand when removing and replacing the chain in order to keep his hands clean -which I thought was a great idea.
To answer the question, I have and can change a flat rear tire, but I am not fast.



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