I am totally confused...

I want to fit EBC Greenstuff pads to my 2016 Octavia vRS diesel and have looked at a couple of online car parts suppliers' sites to confirm the correct reference. There are several types listed for this car in these sites for discs ranging from 288 mm to 340 mm. I have the "Build Sheet" from SKODA Partslink24 for my car with the correct VIN, etc and this shows a PR code of 1ZB for the front brakes.

Both sites show the diameter of the disc for the 1ZB PR code as 312 mm with an alternative of 340 mm for PR code 1LG. I have just measured the N/S/F disc at 320 mm......

Have I got a "bitza" car? Photo of the caliper attached. Looks like the lower anti-rattle spring is broken and the upper one is distorted - incorrect pads?

Is the thing you're measuring with going across the sticky-outy bit in the middle?

If so, cut a u-shaped piece of cardboard with a 312mm gap between the legs, and use that as a makeshift caliper.

I did allow for that by using a kids geometry set square against the disc, maybe my eyesight is a little bit out.

I'll try the cardboard guage when it stops raining and I can summon the strength to lift the wheel again. I think I need more Weetabix....

Any rust on the outside edge will also add to measurement error, unless scraped off back to parent metal beneath.

No further progress - just as it stopped raining I went down with bl**dy norovirus ☠️ on Friday and havn't eaten properly since then...... At least I can keep water down now. 🤞

Just to put this to bed, the OSF disc is 315 mm using Pete's cardboard caliper so I guess with experimental error thay are actually 312mm.

For information, the EBC part number for my setup is DP22150 and they don't include the brake wear sensor (available separately) or new caliper bolts (not availabe from EBC). I fitted these pads in my old Octy 2 and my E38 BMW 740 Sport - much improved intital bite and a significant reduction in black dust.