METROPOLIS PATTERSON TRANSMISSION MEGAEXO Ø19
The BB-4000P is specifically designed to be compatible with the innovative Metropolis Patterson internal planetary geared crankset. This BB spins on oversize cartridge bearings with a die-casted alloy and CNC machined external non-drive side cup. The drive side is forged steel and CNC machined for better shifting mechanism support.
For more information about Metropolis, please visit: www.metropoliscomponents.com
Patterson Crankset: http://pattersonbike.com