What is the best hub motor?

[dozentrio]

I'd like to build a couple of hub motor bikes for when the snow melts. Here are my needs in order of priority:

-Must work well with 72V Lyen 12FET controller. (I want to use the controller to its full 5kW potential)
-Cheap
-Easy to install on rear wheel of a 9 cog casette mtn bike (no disc brakes)
-Comes pre-laced with wheel (not required, would be nice)
-Reliable

I know there are a ton of options, geared and ungeared. What I am wondering is if there's a general consensus on which one is best given my goals.

 

[neptronix]

For that kind of power you're gonna need a DD motor. No geared motor can handle 5kw just yet. Maybe 4kw until you start hill climbing...

from what i've seen, all hub motors have freewheel hubs instead of cassettes. The max size for the screw on freewheels is often 7 speeds..

Cheap and 5kw do not correlate, that kind of power will require something above and beyond a cheap ebikekit/ampedbikes/cell_man/bafang/mac/aotema/etc.

You're gonna be looking at a crystalyte or larger 9 continent in order to do that kind of power.

By the way, at those speeds you may want to consider getting a bike with disc brakes. You will shortly find that you need more braking power!

 

[Drunkskunk]

I've never seen any hub motor that used a casset. 135mm is pretty standard for hub motors.

Given your needs, A 530X, if you mean 5kw per motor. Controller can only do one motor.
a 10KW bike should haul serious a$$

 

[jimw1960]

What neptronix said. Also, if you are going to be pushing the full 5kW of power, you cannot use just any old bike. It will need to be a high-end bike with a bombproof frame and top-notch front suspension; rear suspension would also help.

 

[dogman dan]

Nope. gonna have to reset your goals.

9 continent motors work pretty good with lyens controllers that put out 3000+ watts, but 5000 is toastyville. Methys does it, but I'm not sure for how long. Ventilated of course. BTW, that 12 fet 72v lyens is best used at less than potential vs used up fast at it's full potential. They are happy campers in the 2500-3500 watt zone. For more, look at 24fet monsters.

5kw continuous is going to take a serious motor, like a motorcycle hubmotor.

Best compromise is a 530x, and keep the watts in the 3-4k range rather than 5. And use 5-7 speed srcrew on freewheel. Well, there went cheap.

But cheap is possible along with pretty good performance. My death race bike is the example, copied from others of course. 9c 2807, ventilated. 12 fet 120v controller from Lyens. 50 mph club on 120v. Just barely into the 40 mph club if you use the 72v controller. Amps set at 40. Able to run till a 10 ah lipo pack is used up whithout melting down. Much more ride length would kill it.

 

[dozentrio]

Excellent. Then I shall try the 9c motor and set a reasonable current limit. Thanks guys! I am curious to see how it will compare to my rc motor bike

 

[ryan]

Why not the new 5404? From the sounds of the other threads, it could be what you're looking for.

 

[chroot]

9C can do 3500-4k watts without any problem. Just watch the temperature inside the 9C hub motor.

If you want 5k watt, go RC motor in E-Bike Non-hub Motor Drives section, they are way over 5k-20k watt depends on set up and good luck!

 

[Ypedal]

http://www.ypedal.com/rant/rant.htm

 

[nicobie]

Good job ypedal.

Sticky?

 

[auraslip]

A bigger question; what sort of battery?

Post in the WTB section asking for a 9c rear motor. I got about 4 offers between $125 - $175 for 9c motors.

Another question; what winding?

Good site ypedal - similar what I am trying to do with mine
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[Kingfish]

5 kW? Go 2WD if this is a must-have; split the load between tires.

Been happy with 9C. The one negative: Only supports freewheel. If yer pulling 5 kW, why bother with freehub? Just mount a 7-sp mega-range cog and move on :wink:

All the best, KF

 

[chroot]

Get 9x7 or 8x8 9C hub motor. These are beast

My 9x7 9C ran between 42-47mph on 20s2p LiPo Battery depends on condition such headwind, uphill and etc.

Number of strands copper wires on stators. More strands = more power

8x8 = 64
9x7 = 63

I killed my 9C DD hub motor 9x7 and I am waiting for 10H aka ampedbikes - little better than 9C old version. If I killing 10H again and that's it I am going get xlyte x5303 :lol:

Cause I pushed my 9C between 3500-3750 watt (84v x 45A)

Another question; what winding?

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