Well that thought run across my mind too,I will have to check the track again now that I have a days running on it.I usually run them loose,almost to the point of slipping and then tighten about a turn on each adjuster.
I'll let you in on a little secret. I pop off the seal with a very small and thin flat screwdriver, and grease that bearing every season. I still have the original bearing and 11,000 miles, no issues.
What bearing? On speedo side i have a grease nipple in the housing. On other side theres an oil seal that runs on the axle and theres a seal on bearing
I do that too but what is your limit to replace it? Milage? length of time? or when it feels rough? I've done that to some pretty rough bearings and get another season or 2 out of them.