I read in a UK review that there was no spare, but a puncture repair kit. Anyone know what this is? Seems if I have to take the tire off the rim, find the leak, patch it, wait for the glue to dry . . . put the tire back on the rim and inflate, all in winter . . . I might just buy a donut spare somewhere. Is there some sort of trick to this? It also seems that a blown tire wouldn't be fixable at all.