So about 1100-1200W then. What speed (loaded) would be achievable at that power (15S) you think with a 29er? Do you think the CST 500W could even take 1500W continuously? What is the best controller available to go with this particular motor?
I've read that the standard width of 10-speed cassettes is 37.5mm, is that correct? If so, 38mm sounds like it would be OK. You indicated however
in a previous post that the space available could be up to 404 mm, or is that wihout any clearance the 11T cog and the dropout?
Well, as I'm sure you are well aware, stretching aluminum alloys can result in metal fatigue. If this was not an issue, I think I'd just go with a MAC 1000W + DNP 10-spd freewheel (138-139 mm) to get the 30 mph I'm looking for.