Hi All,
Just to give some background information on this motor- It was conceived mid 2012 to out do the competing Cro-Motor in terms of weight, power and efficiency. We had this motor made at first as an all CNC'd aluminum motor to beat the Cro-Motor in a drag race up pike's peak. Magnet Stack is about ~40.5mm and it features an aluminum rotor with much deeper slots for the windings than other crystalyte motors. Diameter is also .5" larger than HS or 5400 series. Weight is right at 20 lbs even. We were planning to attend the race last year, but a high number of sales and a shipment of batteries about 3 weeks behind forced us to call it off and watch from the sidelines.
However, we continued development of this motor. The sample we have had since last year proved incredibly fast and torquey. With a 60 MPH top speed, we decided not to bring it to market just yet and to test further samples with higher torque windings (our insurance is already crazy enough selling what we currently offer). It was developed initially to work with a 104V nominal 60A 15FET IRFB 4115 mosfet sensorless controller. We currently will offer this motor to the public in about a month or so. I would expect a standard retail version of The Crown (If they choose to sell to other dealers) to go for $699 motor only. Our version with myriad changes including 138mm dropout spacing, provisions for multi speed freewheel, new axle, 11g silver plated phases, neo magnets, higher grade laminations, air cooling w/ temperature monitoring etc. I would expect to have a $100-$200 premium above a standard motor. Expensive, but worth it in my opinion.
The difference from our versions of the 35mm to 40mm is so marginal after all the modifications we have done that we are not going to sell the 40mm version except by special order. The difference from the 40mm to The Crown in terms of acceleration and feel at high power levels is very perceptible and definitely worth the upgrade. The production version can use more of a standard spoke instead of the strange pattern seen in the picture the OP posted (which is used on our samples).