Wheels dedicated to buses

Why are forged aluminium wheels from Speedline Truck are better than steel wheels?

What makes forged aluminium wheels from Speedline Truck so special:

Range of wheels for city buses and coaches

SLT 3211 – 22.5×7.50″

for city buses
especially with an electric drive

SLT 2900 – 22.5×8.25″

for city buses and coaches

SLT 2907 – 22.5×9.00″

for buses