TEENAGER Jordan Clews, has admitted taking part in a vicious robbery which involved a victim being kicked, punched and hit with a hammer.
The 19-year-old, from Cheltenham was jailed for 32 months at Gloucester Crown Court, after taking part in the frightening attack in the town last year.
Clews, from Edward Wilson House in Princess Elizabeth Way, denied hitting Craig Banks with the hammer, during the Arle robbery.
But he refused to name his accomplices, who have never been caught.
Prosecutor Paul Cook told the court that Clews denied using the weapon and did not know the others had it on them.
He said Clews had said in a statement: "I would like to emphasis I was drunk.
"I regret my actions and apologise for the distress I caused."
Mr Cook said that Mr Banks and his friend Adam Harvey were returning from the Umbrella pub on December 18 last year with a bicycle when they were approached by Clews, who had been released from a detention centre earlier that year, and two other people.
He said: "The defendant grabbed the bike saying 'this is mine now'.
"Mr Banks pulled it back before he was punched in the face and the defendant grabbed the bike again."
The court heard Mr Banks was punched and kicked by the group before one of the offenders hit him with a hammer on the hip.
Mr Banks was forced to hand over a mobile phone and £7 in cash and was left with cuts and bruises, including a large bruise on his right hip.
Defending Joe Maloney said: "He was quite drunk and got involved. He very much regrets it and has expressed his remorse."
Jailing Clews for 32 months, of which he will spend half in custody and half on license, Judge William Hart told the court he accepted his guilty plea on the basis he did not have the weapon, nor knew the others did.
He said: "It was undoubtedly a frightening incident, the kind that makes everybody that goes about the streets, fear for their safety.
"You were released from a detention and training centre in February, and seemed to be making progress, but then fell into this offence. It is depressing."
Gloucestershire police launched a helicopter search of the area following the robbery.
They said after the incident they had initially been called to reports of a fight, but on attending the scene officers discovered that two men had been the victims of a robbery.
The £300 bicycle was later found.