Problem Solvers Eccentric Bottom Bracket Shell 54mm diameter 66mm width Silver. The Eccentric Bottom Bracket Shell can be welded into a bicycle frame specifically designed to accept an Eccentric Bottom Bracket. For the utmost in drive-train versatility build your frame around this Shell. Problem solved!

• 54mm inside diameter 59mm outside diameter
• 66mm standard width 68mm total length
• Compatible with Eccentric Bottom Brackets
• Chromoly 4130 Steel construction
• Weighs 244g