Williamsburg, NY – Hasidic schools run by the United Talmudical Academy in Brooklyn are putting the brakes on kids riding bicycles to school, warning parents in a letter that students will be expelled for any free-wheeling offense.

“Even borrowed bicycles” are off limits, the “final warning” letter reads.

The ban was instituted decades ago by Satmar sect Rabbi Joel Teitelbaum, but parents said recent infractions prompted the letter.

“If you have something that gives kids the feeling that they can go wherever they want . . . farther from their parents and the community, it brings a lot of bad things,” said father-of-six Moshe Smilowitz

School officials would not comment.