https://starwars.fandom.com/wiki/Scout_trooper

Scout troopers, also known as biker scouts were specially trained stormtroopers of the Imperial Army's Stormtrooper Corps. They were used by the Galactic Empire on a range of missions, which mostly involved reconnaissance. They had lighter armor than standard stormtroopers, much like their urban counterparts, patrol troopers, who used C-PH patrol speeder bikes to navigate dense urban environments.

Thanks HexarHunter For Photo Made