Good info, Here in Utah, we have freeway speeds of 70,75 and now 80 on quite a few stretches. At 80 I was surprised to see the RPMs close to 6k.
I just returned from an out of town trip and my 16T sprocket was among my delivery items Today I focused on doing the majority of the first service, but I hope to try the sprocket installation within the next day or so. I'll update once I attempt the install...Thanks for the info. I may follow your lead on this. Although I do mostly city driving around town in lower Michigan, when I do get on the expressway I fell like I need one more gear. 70 MPH is at about 5000 RPM.