The Italian tyre brand Challenge offers the appropriately named Gravel Grinder. It resembles a mountain bike semi-slick tyre and is defined by a wide dimpled centre section optimised for low ...

As with gravel bikes, so gravel tyres ... this new construction is to make the tyre more flexible, which in turn makes it faster. Compared to similar semi-slick tyres in the brand’s lineup ...

The Italian tyre brand Challenge offers the appropriately named Gravel Grinder. It resembles a mountain bike semi-slick tyre and is defined by a wide dimpled centre section optimised for low ...