Natural rubber? Definitely used to be a thing and (I think) some higher-grade tires for lorries still have a natural rubber component because it can have better wear properties.
check out FitTrack for an open source fitness tracker for Android: https://codeberg.org/jannis/FitoTrack
Natural rubber? Definitely used to be a thing and (I think) some higher-grade tires for lorries still have a natural rubber component because it can have better wear properties.
check out FitTrack for an open source fitness tracker for Android: https://codeberg.org/jannis/FitoTrack