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R21 was born from a simple question: why should safety be a compromise? For years, the bicycle mirror stayed outside cycling culture — too bulky, too visible, too far from the sense of essentiality that guides every rider. Rizoma chose to start over from there, not by designing one more accessory, but a lens capable of integrating into the bike and into the very act of riding. Invisible in its proportions, precise in its function, immediate in its use. Because changing a habit doesn't mean imposing something new, but making it so natural you can no longer do without it.
R21 is exactly that: 18 grams of technology, Zeiss® optics and essential engineering to give safety the design it deserves.
Just 31 x 39 mm. Barely visible, yet always there. Compact enough to disappear, precise enough to change everything.
Just 18 grams. Lightened structure to reduce impact on the handlebar and not affect performance.
Available in two colors, black and silver, to match your handlebar finish.
Solid-machined aluminum body, resistant, precise and lightweight. 360° spherical adjustment, with a 25° range of motion.
R21 has been enthusiastically welcomed by the Federazione Ciclistica Italiana and the ZeroSbatti Association, two organisations that share a common vision: safety is not an option, it is an integral part of performance. A recognition that confirms how R21 is not a simple accessory, but a tool designed for those who truly live cycling.
For those who are part of these communities, there is something extra: FCI members and registered ZeroSbatti users are entitled to a 15% discount on the purchase of R21.
Every answer, one more detail.
R21 is a rear-view mirror designed for road bicycles and is not subject to road-use homologation.
No, the kit includes all the components required for proper installation.
No, the product is not suitable for off-road use. Moreover, installing the R21 on MTB handlebars, which are completely different from road bike handlebars, would not provide a proper rear view.
The kit includes 3 adaptive grips, compatible with standard drop bar handlebars with an inner diameter between 17.5 and 22 mm. R21 is not suitable for MTB bikes.
Yes, installation takes only a few minutes. The adjustment unit fits directly into the handlebar end. The optical unit uses a quick, solid, and fully mechanical magnetic connection - no complex tools are required.
Yes, R21 is reversible.
Yes, the R21 allows for three-dimensional adjustment, ensuring an always optimal rear view based on your riding position.
Thanks to the three adaptive grips, proper installation ensures maximum stability. R21 is designed not to interfere with the cyclist’s performance on the road.
The R21 lens, developed with ZEISS® technology, is made from impact-resistant materials that prevent the formation of sharp fragments in the event of a crash or fall.
The R21 lens is convex and afocal, specifically shaped to ensure a wide, sharp, and distortion-free rear view, even while in motion.
Yes, it is possible to purchase a replacement lens for the R21 (the replacement includes one lens and a tool to help remove the damaged component).
