5mm thick. Used for 5k miles (no ridges etc) before the tyre fitter dropped the wheel on the other one and bent it. This one is perfect, though have now sold the bike so no longer needed as a spare - was fitted to a 2004 R1200GS - but is common to many BMW bikes.
Collection sussex welcomed - £50 inc UK P&P
Collection sussex welcomed - £50 inc UK P&P