A 2 wk old bike borrowed for an afternoon ride from one mate for another to come along with me.
Quick usual once-over before a ride and the rear wheel was only half into it’s dropout. OK, fix that.
Now the rear gear cable catches with the tyre tread. Odd, why could that be?
Turn bike over – the plastic cable guide had been put on in the wrong position (LH guide hole lining up with RH frame hole). The numpties who assembled / safety checked it must have worked around this by the “rear wheel not properly in the dropout” bodge. Worst thing was that they’d adjusted the brakes to suit the new “improved” wheel position !
That was a Carerra that was bought from Halfords by the way.