Quote:
300-500 miles? Are you serious?
You know in retrospect you have a point.
After doing some more realistic math, prior to switching to ISIS style cranks mid-year last year, I managed about 6-months of riding on Ultegra Octalink BBs - thats while riding 10,000+, hard road miles per year with about 2,000 of those miles on the TT bike (Giant TCR Aero) and the rest on the road bike (TCR Team Composite). My thinking was that the ISIS standard would be a better bang for the buck so I switched to FSA ISIS cranks in September of last year with the FSA Platinum Pro Ti BB. That BB was creaking within 2-months so that actually equates to about 1,800 miles which is more in line with what you indicated. The replacement was a Tru Vativ Giga Pipe and it did not actually wear out but was replaced by the lighter (and more delicate) American Classic ISIS BB - so actually the Tru Vativ is still in service as it found its way onto a friends bike with FSA Compact cranks. The American Classic was installed around November and despite regular maintenance, the BB began creaking mid February so you are right - in reality I managed about 2,500 miles on the American Classic but since it was far less than what I had experienced with Octalink style BBs, I guess I lost sight of actual numbers. At 6' and 175 off season and 165 in season, I imagine lighter riders might experience better service life from the ISIS BB's but for me, I am going to give the external bearing style BB a shot and see what happens.
¯\_(ツ)_/¯