I have both the 500W and 350W at 36V Puma (Mac) motors ready to ship. The 500W motor is available for both front and rear wheel installation, but the front can only be used with rim brakes. Rear is disk brake compatible and can accept a 7 speed freewheel with 135mm dropout. 350W front is disk brake compatible, as is the 350W rear. These motors are primarily intended for a 26" or 700C sized rim but with some overvolts you could run them in a smaller rim. The 350W motor is a little cheaper, will get back with an exact price soon. Shipping options at present are EMS at 35% discount, standard Air and Sea Freight. Paypal adds additional 6% (sorry that is what it costs me).
These motors will comfortable run at 48V and quite a few have also ran them at 60V. Below is a some data I collected from the 500W motor. Even though these are described as a 500W motor they actually pull all the current you can hrow at them and I have personally seen about 1000W on a 36V pack with 25A controller and about 1800W on a 48V pack with 35A controller:
No load RPM with 38.2V supply, 365rpm
36V pack (38V under load), no pedalling, you're looking at almost 40kph, but typically expect about 37kph or so.
48V pack (approximately 50V under load), you're looking at mid to high 40s kph.
A member on the forum (not supplied by myself, but same motor) has reported 55kph at 60V. See attached dyno graph for the 500W motor (the 1000W @ 48V plot is the same motor just run at a higher voltage).
The 500W motor comes with a no cost option single steel gear, but not all of them are fitted with these so it's first come first served till I can get some more. The steel gear does make the motor a bit more noisy but I would not describe it as a noisy motor either way. They're not as quiet as the new breed of Bafang, but they're not overly loud.
I also have some high speed 500W motors. These are 485rpm at 38.6V no load. I ordered a few of these for a dual motor bike which has turned out pretty good so far but they would also work well in a smaller rim. Not recommended for a single motor in a 26" rim, although they could work well with a higher current limit controller, but I haven't personally tried that yet.
Here's a few pics:
350W front, with disk, polished finish
500W rear, with disk, painted finish
For wheel building in the USA, drop johnrobholmes a PM. I may be able to arrange for the motors to be fitted into rims in the future but as yet I do not have the parts in stock.
Drop me a PM or send an email to emissions-free_worldwide (at) hotmail.com
Last edited by cell_man
on Mon Jul 12, 2010 4:53 am, edited 1 time in total.