If you steal this bike, you break it.

Three young entrepreneurs fed up with thieves swiping their two-wheel rides say they have designed the world’s first “unstealable” bike.

Their solution: the bike becomes the lock.

The aluminum down tube on the frame splits into two pieces and forms a lock when connected to the seat post. It takes just 10 seconds to assemble the lock, according to the creators.

The end result is big deterrent as cutting the lock also destroys the bike.

The young creators from Chile — Cristóbal Cabello, 22, Andrés Roi Eggers, 23 and Juan José Monsalve, 24 — dropped out of college to pursue the project.

They got an investment of $100,000 from the government to develop the bike, and used crowdfunding Web site Indiegogo to sell their first model, known as a Yerka.

More than 15 million cyclists are victims of theft every year, according to Eggers, who said it has happened to him twice.

The problem on the rise in New York City as more people get around the city on two wheels. Reported bike thefts reached 4,849 in 2014 — up 600 more than in the previous year, according to NYPD statistics provided to the City Council in April.