The rigid version is constructed to deliver a long service life and counter measures to avoid the inconvenience of punctureshigh mileage tirestrong casinggraphene is a revolutionary material in the form of a very thin nearly transparent sheet of pure carbon in its extreme form it is as thin as a single atom 1100 000 000th of a metre vittoria used directa plus graphene called g which is 2 to 8 atoms thinthe benefits of grapheneenormous surface area 1 gram around 2630m that can facil