The adapters to increase rotor size in a post-post situation (which I
have front and back) look like this:

http://i.ebayimg.com/images/g/oK8AAO...Au/s-l1600.jpg

My MTB has a factory one from 160 to 180mm up front but I am considering
203mm. That would make the thing even more extreme, like this where the
screws would look more cattywompus or out of line than they already do:

https://i.ebayimg.com/images/g/w4MAA...bTa/s-l500.jpg

Why are the spacings so different on both sides while for 160mm their
are not?

--
Regards, Joerg

http://www.analogconsultants.com/