I decided against them on my newest recently acquired C&V bike because it has single wall rims.
I'd decide against them on a folder because any hardware store or Walmart is very likely to have a patch kit and fairly likely to have a tube in 12-16-20 inch sizes
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."