Just bought a set of these for my Pivot Mach 5.7 which has qr rear dropouts. I have been running a Hope Pro 2 with a Superstar 10mm qr axle.

What (if any) are my options for something beefier than the 9.5mm adapters and qr spindle?

Apart from a new frame with 12mm bolt thru!!!!! Hmmm….

Anyone?

I don’t think you can get 10mm adaptors for crossmax hubs.
This looks as if it may be the right thing, but as you can see they are not available and may not be correct.
http://www.chainreactioncycles.com/mavic-10mm-its-4-hub-reducers/rp-prod40569
Perhaps asking a Mavic dealer may help?

dont get them out the box until you find out?