Hey pedal people, mechanics, tech junkies…I have a set of Ultegra PD-6800’s on my road bike and Dura Ace PD-9000’s on the TT. I think they have been on my bikes since 2014 or 2015. I ride approx 10,000 miles/year. Just came across a good deal for a set of 9100’s but, if mine are still spinning smooth is there any reason to buy? Or just keep servicing until…?