The wheels on this bus definitely aren't going round and round.

Peak-hour traffic came to a halt on busy Darling Street in Balmain on Thursday morning when a wheel fell off a bus as it tried to drive through a roundabout.

The wheel fell off the bus at the intersection of Darling Street and Curtis Road in Balmain. Credit:Craig Lewis

Witness Craig Lewis was walking near the roundabout at the intersection of Darling Street and Curtis Road, not far from The London Hotel, about 7.55am when he said he heard an "almighty bang".