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@Honest
mystery solved, turns out its both, and QR comes on the model I'm after which is nice
The rear wheel has been upgraded to a 142x12mm axle, which ties the back end together tightly. The drop-outs are convertible between the 142x12mm and standard 135x5mm quick release via removable inserts, so your old set of race or training wheels will still fit. That said, when set up for 135x5mm, the dropouts remain ‘closed’ so you need to completely remove the skewer before the wheel will come out—it’s a little inconvenient and no longer a ‘quick’ release.
http://bicyclingaustralia.com.au/2014/12/trek-superfly-eight-review