Just makes it easier to set up the alignment, chain tension etc
Can still do this without those things. Your bike will look sleeker without them altogether
Wheels don't fall out of frames when the dropout is front facing. Rear facing track ends would only result in the wheel being pulled into the frame. And before that the wheel would slip and rub on the chain stay causing the bike to slow down quickly, rather than fall out.
No need for them, just make the bike right mechanically and do everything up tight. Job done.
100% not necessary.
Just makes it easier to set up the alignment, chain tension etc
Can still do this without those things. Your bike will look sleeker without them altogether
Wheels don't fall out of frames when the dropout is front facing. Rear facing track ends would only result in the wheel being pulled into the frame. And before that the wheel would slip and rub on the chain stay causing the bike to slow down quickly, rather than fall out.
No need for them, just make the bike right mechanically and do everything up tight. Job done.