Originally Posted by
Polaris OBark
135mm disc hubs with quick release are completely standard (and equivalent to 142mm thru axle).
My guess is this must mean something else.
This is true. The problem is that the Specialized TA hub measured 135mm, not 142, so a QR adapter would take it to 128mm or thereabouts, so it would not fit in a 135mm QR dropout, the narrowest with disc brakes.