Amped Bikes Geared Hub Motor (rear wheel) Review

[auraslip]

Hey what is your full throttle speed on the flats?

[dogman]

Nice review. Great to see more of em. I'd like to test one, but till then you are it and did a great job. Keep it up and become Amped's consumer testing guy, free motors are the bomb. I'm just starting another fusin test now.

I can't recall which motor you were refering to about the 7% hill climb. It seems to be at 36v. None of my other motors were quite that bad on 7%, so I'm curious. For sure, at 7 mph no pedaling, a dd motor is turning into a heater. Edit. Ok now I see it was a dd from amped, any idea which wind? A 9c, 9x7-2807 should be climbing 7% at 12-13 mph no pedaling. 180 pound rider.

Once you have some good data, please post it on my thread comparing motors on hills. I was doing a test where I went from a dead stop at the bottom of a longer 7% hill, but yours will be long enough. Just the top speed at different voltages at 6-7% tells a lot.

[LI-ghtcycle]

Hey what is your full throttle speed on the flats?

Oh hey, sorry to get back so late!

It's about 29MPH with me pedaling like mad, and 23-25 MPH motor alone, (depending on the day not sure why it varies so much, maybe wind) I have too many lights at the moment to run it at night on just a 9AH pack, so I am saving up to double my battery size, maybe even up the voltage closer to 60V (maximum for my Turnigy Watt Meter) so I can run my Magic Shine headlight at night for at least 2 hrs time on high. I also have added blinkers and a tail light for safer night riding, but I haven't felt well for the last few months, just starting to get where I might be able to ride again soon!

So, until I get my battery pack closer to 20AH+ I think I will be able to do some more testing, with my magic shine blasting through the battery at night, it really put a strain on my current 9AH pack.

[LI-ghtcycle]

Nice review. Great to see more of em. I'd like to test one, but till then you are it and did a great job. Keep it up and become Amped's consumer testing guy, free motors are the bomb. I'm just starting another fusin test now.

I can't recall which motor you were refering to about the 7% hill climb. It seems to be at 36v. None of my other motors were quite that bad on 7%, so I'm curious. For sure, at 7 mph no pedaling, a dd motor is turning into a heater. Edit. Ok now I see it was a dd from amped, any idea which wind? A 9c, 9x7-2807 should be climbing 7% at 12-13 mph no pedaling. 180 pound rider.

Once you have some good data, please post it on my thread comparing motors on hills. I was doing a test where I went from a dead stop at the bottom of a longer 7% hill, but yours will be long enough. Just the top speed at different voltages at 6-7% tells a lot.

Hmmmm that is a good question Dogman, I'm really not sure which winding my father's DD motor is. I'm guessing since it is one of the second batch that it's most likely 9x7, similar to the 9c, but like I have said, it has never enjoyed the battery power it really needs. It's only in the last month my father has ordered 2 more 36v Dewalts (making a total of 6) for a 13.2 AH battery. However he has other problems with the design of his battery pack that causes him to loose conductivity (poor design of how his interface boards are attached, alas he doesn't want to improve them) so I'm afraid until that changes, we won't get any reliable testing from his bike. I am hoping to convince him to allow me to build him a better battery pack similar to what I am doing and then those problems will give him the full performance of his bike.

[dogman]

I see, maybe it was just the battery that was limiting it when you got on steep hills.

[SanFranRider]

How noisy is the AmpedBikes geared motor - at power-up, at WOT? Can you compare the noise level to a DD motor like a BionX or 9 Continent?

[docnjoj]

Yep Noise is important (at least the lack of it) to me too!
otherDoc

[ronnieb52]

My rear geared Ampedbike is pretty quiet. I can hear it wind up a bit when I take off, but once going the wind noise is louder than the gears. I've gone to 48 volts and it runs much better now.

[SnuffysBluff]

I just got a AmpedBikes geared front motor.

Performance is a bit disappointing compared to the Amped DD (I have two on other bikes).
All running @ 36 volts.

My geared motor has less torque than the Direct drives. Same bike, same batteries, same me.
The geared barely crawls up my 100 foot long inclined driveway while the DD zips right up it.
Even with a run at it, it slows down to a crawl.

No pedals to help. It's my home made stand-up trike.

Can that little controller handle 48 volts?

[Ypedal]

Needs more amps.. the stock mini controller is only allowing 15 amps max..

[SnuffysBluff]

Needs more amps.. the stock mini controller is only allowing 15 amps max..

Thanks a bunch "Y"!
I hooked up my DD controller and it made all the difference.
Why the heck would Dan use that little thing? Cute as it may be.
I was ready to put the direct drive back on.

[ronnieb52]

With my rear geared kit I have a Turnigy 130A Watt Meter and it shows that I only use/get around 13.5 amps while riding and up to 750 watts. I was wondering if I could use a 20 amp controller and see improvement? Aside from going from SLA's to Lifepo4 batteries that's all I have done. It runs on the flat around 25 to 27 mph. A bit more power would be nice.

[SnuffysBluff]

It worked for me.
Still trying to get the pin-out schematic on my new throttle tho.
Had to use an old one.

[Ypedal]

These little geared motors are designed to be 250w motors, pushing them harder is possible but the more you push the more you have to be carefull not to destroy them ( first thing to go are the nylon gears .. ) 36v 20~25 amps is still reasonable, but is about the limit before things start to be sensitive. some guys are running 48, 60 and + volts on them but that's way over the limit for these mini's.

Ride your normal route and pull over to check motor temps with your hand once in a while, if it remains cool you are not pushing it.. if it's warm you are ok.. if it's hot need to lighten the load or ease off on the throttle lol..

[DigitalNerd]

dang, look at that dash!

that thing is crazy loaded man. Pretty sweet though! Keep it up