I've already picked up an HS3540 in a 26" wheel. I was put off by the HT3525 due to the slower speed at my current battery voltage of 66.6v. Also the torque seems to drop off pretty quick towards the top end of the speed on the simulator. I do appreciate that the HT takes more time to overheat and has slightly more copper. Nicobie the speed you report off your HT seems a little faster than the simulator predicts, it sounds pretty good actually and that would work for me. You must have really nice acceleration with that setup. I'll have to wait and see for myself how much of an issue heat becomes and let that determine my next eventual motor purchase.
I haven't any experience with the slower wound motors. I tend to look more at the faster speed windings so I can hit a target speed using less voltage but then overheating does become an issue this way and slower speeds tend to be less efficient. I was thinking I'll probably be able to control the heat with my riding style and if that's not enough I'll eventually either drill holes, install fans or move to a smaller diameter wheel. It does seem that a lot of folks here prefer the slower wound motors and just throwing voltage at them to get the speed up. Part of my decision was based on price which is the primary reason I picked up a local second hand HS laced into a 26" wheel, seller claimed it had never been used and it looked mint to me and I saved almost $100. Still have yet to test it out though. Fingers crossed there are no cut hall wires. I took a chance to save some money. Hopefully I won't get burned.
Last night I modified my old 36v to 72v crystaltye 20 amp controller. I added some solder to the shunt and took the bike out for a test ride. I don't have a cycle analyst or anything to measure the power I'm pulling now but I felt a real nice boost in torque and acceleration last night and I had the classic ebike grin going.
My old motor has new life.
I'm actually excited to go into work this morning to take out my old 407 front crystalyte, I'm still using to commute, with the new shunt mod I installed last night.