When the goat head thorns came out last fall, I needed some tire liners — but my P.3 is too nimble and tasty for Mr. Tuffies. Enter the Tyvek envelope.
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Dupont Tyvek is light, puncture resistant and very light. I cut some 9×12 envelopes into strips, taped them together lengthwise then put them between my inner tubes and tires. While everyone I know got zillions of flats, I have yet to suffer one.
If your riding spot has thorns, spend $20 on a box of Tyvek envelopes and keep your entire crew rolling.