rear sprockets BETA 390 RR Enduro 2015

Crown Stealth Supersprox

Built with internal aluminum hub and external steel teeth.

To support these characteristics, the company SUPERSPROX has developed a process under construction with an indestructible riveting!

The Supersprox crown has installed over 5.ooo.ooo of rivets in over 10 years of industry experience with positive feedback and no breakage!

Thanks to the technology used on this product, Supersprox guarantees a service life of up to three times in a normal aluminum crown