Series of chainrings for 11-speed transmissions designed for Syntium HSP (High Stiffness Points) and Race HSP cranksets with four fixing points. Manufactured from CNC-machined AL 7075 T6 aluminium alloy with TT Total Treatment anodization.

Stiff and resistant, it ensures top-level performances. Its design starts from a CNC machined and anodised Ergal 7075 T6 plate, to which a carbon profile is coupled using special adhesives. The result is a chainring that combines lightness and stiffness for top-level performances.An in-depth study has been dedicated entirely to the anti-fall profile of the tooth, in order to guarantee smooth and efficient transmission when using the single chainring.The X1 RD is compatible with the SH Dura Ace 9200 crankset for single chainring use. The available chainrings are 58 / 60 / 62 / 64 / 66 / 68 with a weight of 226 grams for the 58 toothing.

Performance comes from turning every watt into motion.X2 RD SPM combines low weight, stiffness and efficient power transfer in a setup compatible with SRM® power meters.

Every watt counts. Every detail can make a difference.X2 RD MPM combines low weight, stiffness and efficient power transfer in a setup compatible with Magene® power meters.

92 mm Press-Fit bottom bracket designed for cranksets with 24 mm Ø axle. Body manufactured from CNC-machined resin. Miche sealed bearings.

68 mm BSA bottom bracket with Italian thread designed for cranksets with 24 mm Ø axle. Body manufactured from CNC-machined AL 7075 T6 aluminium alloy. Miche sealed bearings.

68 mm BSA bottom bracket designed for cranksets with 24 mm Ø axle. Covers manufactured from CNC-machined AL 7075 T6 aluminium alloy and resin body. SKF sealed bearings. Available with English-pitch thread.