Originally Posted by
garage sale GT
I think they'd be deeper and the ends would be more squared if they were truly intended to protect the drops from spreading.
Possible, no way to tell from the pic. Wouldn't take much engagement to help prevent spreading though.
Originally Posted by
garage sale GT
Like the name implies, they're for controlling chain tension.
I know that's the first and foremost use.
But if track ends spreading was a common enough issue to merit attention, it'd be dead easy to make a pair whose main function would be to prevent track ends from splaying open instead, or as well.