Just replaced my Inner primary bearing @ 17k. Started getting a little noisy and the inner seal started leaking. All went smooth. The bearing came off the shaft with ease. I did notice a little wear on the shaft and Looking at the old bearings I saw wear there also. I did nothing to the shaft, just put the new bearing back on. It seemed to rotate smooth. Question is, Am I going to be doing this again and again and will the shaft have to be replaced at some point and time? Thanks!