Thread together bottom bracket for frames using the BBRight bottom bracket standard and M30 28/30mm spindle diameter Praxis - compatiable cranksTwo machined aluminum cups thread together keeping the bottom bracket stable in the frame, increasing bearing life, and simplifying maintenanceIncludes BB with bearings, silicone dust seals and an assortment of spacersFully servicable design79mmBBrightBox/Praxis M30Aluminum146gUPC/EAN/GTIN: 811079029003