South Yorkshire Police initially said three men were involved in the attackÂ butÂ detectives are now looking for five culprits.
They struck in Spring Close View, Gleadless Valley, at 5.30pm on Sunday,Â September 2 after one of the bikes hit a 25-year-old man, who was then attacked.
He was stabbed in his legs before his attackers rode off.
The men,Â whowere all wearing balaclavas or helmets, were onÂ a motorbike and two quad bikes.
Remembering 'beautiful' and 'amazing' Blake and Tristan Barrass three years on from tragic Sheffield brothers' funeral
Sheffield Council employees sacked as fraud increases including theft and excessive internet use during work
EuroMillions: Mystery winner from South Yorkshire has won £79,242.50 on The National Lottery
Power cut Sheffield: Hundreds of homes in Hillfoot area without power ahead of 28C heatwave today
Sheffield sexual assault: Girl, 13, victim of 'serious' sexual assault in Chapeltown
The motorbike was blue and one of the quad bikes had a green bar across the front.
South Yorkshire Police said the victim '˜suffered a number of stab wounds to his legs'Â but has since been discharged from hospital.
Witnesses or anyone with information should call South Yorkshire Police on 101 and quoteÂ incident number 711 of September 2.