http://rc-monster.com/proddetail.php?prod=crt.517mm
Design works equally well with the crt.5 or mini hyper - the adapter fits over any 12mm wheel hex. The 17mm nut includes a locking set screw to prevent loosening, and is threaded to the stock axle(m4 threads). We may offer different offsets and perhaps different nuts(for 5mm axle, for example) in the future, depending on demand.