Fire crews dealt with a blaze involving 350 tyres in Llandudno, Conwy, early on Saturday.
The blaze broke out at a commercial garage in Builder Street, shortly after 00:35 BST.
North Wales Fire and Rescue Service said three crews tackled the blaze which spread to two parked vehicles.
No-one was reported injured. The crews left the scene at around 03:20 BST.