Police in Caerphilly are trying to trace the owners of four bikes recovered in the Lansbury Park area.
Officers found the bikes while searching a property on April 8.
One 40-year-old local man was arrested on suspicion of theft and burglary and has been bailed pending further enquiries.
The bikes are described as follows: A white Scott Sportster; a grey Specialized Hardrock Pro (possibly not orginial); a white Giant bike; and a silver Giant bike.
Anyone who identifies any of the bikes as theirs is asked to call 101.