Between 12.35-1.15pm on Saturday, the victim was attacked while cycling in Reading Road after he had a confrontation another man.
He was then assaulted, causing him to fall off his bicycle and sustain a facial injury, with the attacker running off in the direction of Baslow Road.
Two members of the public chased the alleged attacker into Chatsworth Avenue where he was held.
The victim has not come forward, though a 4x4-type vehicle was seen to stop and help the victim The victim or anyone with with information, can call police on 101.
A 17-year-old boy has been arrested in connection with the incident and bailed until December 4.
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