Amen !MotoMark said:3. Bottom bracket design. Isis stinks. External bearings are dumb. Show an external bearing setup to any non-cycling engineer or mechanic and they will tell you external bearings are just dumb, dumb, dumb. Solution? It's a custom frame right? Get a BB shell that can actually house bearings that will stand up to some abuse. www.oversizebb.com. I went through 4 ISIS BB in 1.5 years. This MEGATECH is still perfectly smooth after a year with LOTS of tough offroad miles + torque associated with SS only use. Especially shocking when I pulled it apart and BB shell had lots of crud in it. Is this solution: Weird? yes. Obsolete already? Maybe. Works? Absolutely!