I have been experiencing problems with the service life of Shimano bottom brackets on my road bike. I have had two Dura-Ace units that began "ticking" within 200 miles, and were totally shot in less than 500 miles. When dismantling the units, I could see very noticeable scoring on the spindles.
I am now trying an Ultegra BB, and during the FIRST ride I have detected slight ticking starting with this unit.
Has anyone else had these problems? I am larger than the average road rider (230 lbs) but have had no real problems over the years with any other bottom brackets.
As far as I know, there are no aftermarket bottom brackets that are compatible with the new style Shimano cranks, so I don't know where else to turn.
Anyone have any similar experience of advise to share?