Tyre treads and colors
Pirelli reduced the tread of its tyres at specific venues last season to help compounds combat blistering, as a thinner tread reduces heat build-up. Faster and aerodynamically higher-loaded cars have compelled F1's tyre supplier to run a thinner tread on all of its 2019 designs and at all tracks.
To help fans get a better grasp on tyre strategy at races, Pirelli has discarded its array of rainbow colors and replaced it with just three colors, from soft to hard: red, yellow and white.
The compounds corresponding to those designations will change depending on the circuit, with Pirelli supplying a selection of five different types of rubber, ranging from C1, the hardest, to C5, the softest.
But regardless of the compound mix chosen for a race weekend, only the three red, yellow and white colors will be seen on the cars.