Offering the best in both value and performance, the Cane Creek Hellbender 70 Bottom Bracket will be an impactful and lasting upgrade to any bike. It features 440C stainless steel bearings to provide exceptional ride quality and reliability. Designed for use with 30mm spindles. Anodized black finish. 440C stainless steel bearings offer durability and corrosion resistance. 6061 T6 machined aluminum cups are lightweight and durable.