Thanks Marco for the info.
When I go to the FK website (English) I see the following -
http://www.fk-automotive.org.uk/websale7/BMW.htm?Ctx={ver%2f7%2fver}{st%2f3ea%2fst}{cmd%2f0 %2fcmd}{m%2fwebsale%2fm}{s%2ffk-automotive%2fs}{l%2fEnglish%2fl}{mi%2f145-2834%2fmi}{p1%2f1dbd69c92a821e2279109891dcce0137%2 fp1}{md5%2f937b1b52de4c47cbd77e357f9a0dbff0%2fmd5}
It doesn't look like the 20mm (2 x 10mm) or 26mm (2 x 13mm) have that lip (ring) on the spacer?
I see only the 30mm (2 x 15mm) which has the ring?
I wonder if they have changed them
Edit: I looked on the German site and found that the 26mm has lip but 20mm one does not
http://www.fk-automotive.de/websale7/Spurverbreiterung-BMW.htm?Ctx={ver%2f7%2fver}{st%2f3ea%2fst}{cmd%2f0 %2fcmd}{m%2fwebsale%2fm}{s%2ffk-automotive%2fs}{l%2fDeutsch%2fl}{mi%2f145-2834%2fmi}{p1%2f37d3d4365906ac0515cb71ea57354bcb%2 fp1}{md5%2fab93a11ed9d3f87a56700ff23300c28d%2fmd5}