Another comment on patch kits and heat. I had one that included a crayon for marking where the hole is on the tube. It seemed like a good idea until I actually needed to use the patch kit. The crayon had melted and made all of the patches useless. I had to flag down a cyclist and ask for a patch. I even bored the poor guy with my crayon story so that he didn't think I didn't bother to pack a patch. Possibly a problem unique to the hot states but something to think about.