Moon RS-I / RS-J O-Ring Set - 2 Pack

The Moon RS-I / RS-J O-Ring Set (2 Pack) provides durable, reliable replacement mounting rings for a secure fit on a wide range of handlebars and mounting points. Designed for long-lasting performance, these high-quality rubber O-rings ensure your Moon lights stay firmly in place, even on rougher rides.

This set includes two O-rings in different sizes - 20–35 mm and 35–52 mm - offering excellent compatibility across multiple bike setups. They are ideal as spares or replacements for worn or misplaced rings.

These O-rings are also fully compatible with Helix series lights, including:

• RB-37-R (Helix series)
• RB-37-W (Helix-W series)

Simple to install and built to last, the Moon O-Ring Set is an essential accessory for keeping your Moon Helix and RS lights securely mounted and ready for every ride.