A drug dealer stabbed a teenager to death in a dispute over a bike.
Nathan Towsey murdered Matthew Rothery at his home in Woodborough Road, Mapperley, on 14 April.
The 18-year-old was taken to hospital with knife wounds to the arm and knee, the latter of which cut a major artery. He died shortly afterwards.
A jury at Nottingham Crown Court found Towsey guilty after five hours of deliberation. He will be sentenced on 7 November.
'Unforgiveable and devastating'
Nottinghamshire Police said Towsey, of Braunton Crescent in Gedling, Nottingham, was a "low-level street drug dealer" who stabbed Mr Rothery as they argued about a bike.
"He saw this as an opportunity to assert his control and inflict fear," said Det Insp Justine Wilson.
"This callous attack has devastated Matthew's family who have lost a son, brother, cousin and nephew."
Mr Rothery's mother Sharron Hartfield said: "Matthew was a cheeky, loving, kind hearted, affectionate son.
"He was not perfect and he tried to push boundaries but he had a heart of gold and would help anyone.
"Young men carrying and using knives is unforgiveable and devastating and this needs to be addressed in our society."