Originally Posted by powers2b
You will have to buy a new slightly longer axle and two nuts, transfer the hardware on the QR axle to the new axle and bolt it to the bike. Seems obvious.
Enjoy
QR and solid axels are often different in diameter.And, depending on the hub, the switch isn't possible. So if one is worried about 'security' in a theft sense,just lock the wheels to the bike.