Police in the area say they discovered more than a hundred cycles in the elderly man's two room apartment, with ten others located in a storage room.
Officers had been called to the flat to question the man in connection with another crime.
They are now trying to trace the owners of the bikes.
Local police chief Frida Braf told local news site mvt.se that this would "not be easy and will take time".
The suspect is currently on bail after being questioned on Monday.
"He said he found the bikes at various locations in the country and cycled home with them," said Braf.