Brake disc is too thick for calliper

[mioba]

Did you use anti squeal paste on the back of the pads where there is any metal/metal contact.

You should always replace brake hardware (disks , pads) across the axle at the same time.

Usually thats why they are only sold in 2

[Aaronrichie]

Ah that must be my issue, I’ll put some copper grease on the pads and change the other side too then, thanks for all the help

[Aidan]

drive it home, then check the pads are floating in the caliper, often a build up of old dust and rust stops them moving freely, and lube the backs of them as detailed in the manual