I have been talking to Phil at Surface 604, I sent him pictures of what I need, The LEFT side Crank bearing (see attached image) is the bearing that is making the noise. I tried calling the local e bike shop in Oregon (Ashland area) and they sell Surface 604 bikes and they recommended I call Surface 604. I am not sure what you mean when you say "Bottom Bracket" Is that a complete crank set? Because most bearings have a serial number and are manufactured by a few company's (Timken, National etc) I am a 40 year auto technician so I understand the mechanical part of this, I am just trying to obtain the bearings if you can help. Thanks for your help.