Lezyne KTV and Zecto² Replacement O-Ring Set

The Lezyne replacement O-ring set for KTV and Zecto² holds the rear light securely on the seatpost. It contains four black O-rings: two large ones with an internal diameter of 52 mm and two small ones with an internal diameter of 40 mm, both with a cross-section of 3 mm. It is useful when replacing worn O-rings or fitting the light to a seatpost with a different diameter.

To choose the size, measure the seatpost diameter where you mount the light: the large O-rings are designed for wider seatposts, and the small ones for narrower seatposts. They are made from rubber. The rings are compatible with the KTV (2026) and Zecto² series.

Founded in 2007 in San Luis Obispo, California, by Micki Kozuschek, Lezyne is now based in Reno, Nevada. It makes pumps, lights, multi-tools and bags to accompany cyclists on their rides. In 2011, it began developing its own LED lights.