Got a small tear in a rear nobby nick UST.

Not so much a whole, more a slight tear that the air is leeking through gradually.

Can I wack Superglue in it or any other fixes?

In that situation, I’ve always just stuck a normal patch to the inside of the tyre. Really rough it up first and let the vulcanising solution dry before you put the patch on. They’ve held up for me.

ive found that letting all the air out, puttting some glue from a normal puncture repair kit on it, and leaving it to dry works perfectly. Presuming you have sealant in the tyres, that isnt quite sealing it…

Super glue has worked for me.

Black nasty duck tape as an initial trailside repair, and then standard puncture patches to fix properly.