Quote:
Originally Posted by bshell
Totally unfamiliar with polyurethane tubes and am now curious.
My jersey pocket would love a lighter/smaller spare tube.
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I have some for spares/emergency use. They are much smaller/lighter than butyl or latex.
I bought some of the less expensive ones off Amazon, but the vale cores aren't removable, so they're useless to me (50mm deep rims, tubes have 40mm stem). Doh!