Rear caliper service and pad change

[Grumpy Goat]

After writing my reply above I went out and had a look and I would guess pad thicknesses were about 2 - 3 mm for front and rear. I have approaching 48k miles on my bike. I still intend to pull the pads and sample the thicknesses, and will revert back. Will probably frame the viseo as visual thickness measurement vs actual measurement.