The Ultegras that came on my '96 carbon 5020 road bike wore out in ~8000 miles,
the bearings went bad. I was on my second set of cleats. YMMV. The speedplay
X2 I used on the three road bikes have between 10 and 13Kmi with no perceptible
wear. Cleats are good for 5-8k. The Frogs on my bent are upto 16kmi and the
3d set of cleats, they wear out faster than the X cleats. Bearings are in excellent
shape.