@Criggie I am just curious. If dropout adjustments are necessary for a perfectly taut chain on a fixed-gear bike, how have fixed-gear bikes migrated to thru-axles? (Because current-generation fixed-gear bikes did move to thru-axles; no?)
No idea - I don't own or ride either. I suspect SS and FG bikes have either trackends, or eccentric bottom bearings, or they only do such limited mileage in their lives, that chain stretch isn't an issue
but you're right - through axles can't move/adjust
therefore the adjustment is elsewhere, or nowhere.
@PaulH I had seen through-axles with two positions. It's nice that this variation, enabling finer adjustments, exists.
But you wouldn't want to lose the absolute certainty that the wheel's axis is precisely perpendicular to the center-plane of the frame.
I suppose you could look for a pair of bolts of length 10 mm, 12 mm, 14 mm, etc, and insert one pair temporarily as space fillers on either side until you've tightened the axle.
@Sam7919 like track bikes, there are screws in the forward section of the dropout that allow you to align the wheel to your desired precision. Once you’ve done that, as Maplepanda has said, you can generate a lot of clamping force with 4 M12 bolts. The system works very well.
