Well, I had no clue at all whether I would get this working before I bought the calipers...lol.
For my application, I went for 28mm vented discs in front, 12,7mm thin solid ones in the back.
As for diameters - in the back I went down from 297 to 290mm, in combination with the new calipers/pads, the best combination (imo).
As for the front - the initial plan was using 304mm ones, but had them machined back to 290mm.
Reasons for this were a better use of the available disc area, and adaptor design.
With the adaptor as I had it in mind, I had unused disc surface (on the outside radial wise), which made no sense.
One going for 304's should have hats made with a larger diameter than I did, otherwise there would be too much unused disc surface on the inside of the disc (radial wise), and which is what I would do if I were to do this again. And since alloy is much lighter than steel...
Have the 304's machined back down to 290mm saved me 780Gr/disc.
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