Praxis Works Bottom Bracket - Ceramic | M30 | BBright (Road) | PF46-79-M30

The high-quality M30 bottom brackets from Praxis Works are designed for the respective crank shafts with a 30 mm diameter on the drive side and a 28 mm diameter on the non-drive side. While the use of heat-treated aluminum for the bearing cups ensures greater durability, a waved washer on the drive side ensures the correct bearing preload.

Version with ceramic ball bearings for road bike frames with BBright bottom bracket shells.

Technical details of the Praxis Works bottom bracket

• bearing cups: aluminum (forged, machined, heat-treated)
• ball bearings: ceramic (ABEC-5)
• crank shaft type: M30 (⌀ 28 mm left / 30 mm right)
• bottom bracket shell type: PressFit (BBright, only for road bikes)
• bottom bracket shell diameter: 46 mm
• bottom bracket shell width: 79 mm
• weight: approx. 130 g (manufacturer information)

Praxis Collet Design | The patented design featuring the orange elastomer collet ensures a secure, specification-compliant fit of the bottom bracket cups outside the frame. This not only results in greater stiffness but also avoids the problems other systems face due to tolerances between the frame and lock rings. When the bottom bracket half on the drive side is screwed in, the elastomer expands outward to a precisely defined limit, thereby evenly distributing the pressure within the bottom bracket shell.