Well, I kid you not, but that 'stuff' is actually known as 'anti-skid surfacing'. :)
@Oliver Schick started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Well, I kid you not, but that 'stuff' is actually known as 'anti-skid surfacing'. :)