The Hellbender 110 Ceramic uses the highest level of bearing technology available. Our finest level of bottom bracket provides an incredible mix of performance and longevity through the use of Enduro XD-15 ceramic bearings. These bearings feature nitrogen-infused stainless steel races that will not rust or corrode, paired with Silicon Nitride ceramic balls that are harder and rounder than steel ones. The result is buttery smoothness and a bearing that we 100% guarantee you'll be satisfied with for as long as you're riding it. Highlights: 100% Lifetime Guarantee - The last BB you need. Enduro XD-15 ceramic bearings Machined aluminum cups Kluber NBU52 Grease Note: Bottom brackets do not come with spacer kits.Not sure which bottom bracket you need? Grab a set of calipers and follow this simple flow chart left to right to find your bb. Looking to add some color? Check out the Hellbender 70 in Chroma Studio.