Smart Pie 4 and NMC 24V 20Ah Battery

[Jim R]

Hi Trex what make is the easy to fit in the photo you talk of, and would it be good at climbing? I have a 17% hill to climb outside my house. If not any suggestions?

 

[trex]

that motor is from this company:

http://sempumotor.en.alibaba.com/product/1858723871-221832943/Integrated_Front_motor_for_E_bike.html

They showed it at Eurobike last year.

17% gradient? if it's long then it will be tough for any bike, DD motors like the Magic Pie are not good choice. If you are heavy, a BPM motor, if not, any crank drive.

 

[Jim R]

Thanks for the help. Yes it's a long gradient and I'm about 15stone. Would an 8fun crank drive do it. I don't know what a BPM motor is. Sorry for the ignorance

 

[Kinninvie]

A BBS02 would do it no problem.

 

[trex]

Thanks for the help. Yes it's a long gradient and I'm about 15stone. Would an 8fun crank drive do it. I don't know what a BPM motor is.

Most hub bikes come with one of the three main types of motor: direct drive (240mm diameter, 7kgs-9kgs, cheap and very robust but heavy, has low torque, not good for hill climbing), 120mm diameter, 3 kgs geared hub motor (good torque, lightweight, stealthy but not good for steep hills, still is the most popular choice because it's not expensive) and BPM (BPM is the abbreviation for big powerful motor, geared, 180mm, 5kgs, big torque, good hill climber, good pulling power). BPM bikes from Kudos: Tornado, Sonata, Rapide, from Woosh: Big Bear, Zephyr-B, Sunbear, from Cyclezee: all the Ezee bikes are equiped with the large Ezee V2 motors.
15st is average, you can go for crank drive or BPM.
BPM is better for short, undulating hills while crank drive is better for steep long hills.

http://wooshbikes.co.uk/?krieger

 

[Jim R]

Thank you very much for your informative reply Trex I appreciate your help, and cheers to Kinninvie for the input

 

[Jim R]

After considering your advice, I bought a bafang crank drive motor with a bottle attachment battery from Eclipsebikes.
These I mounted to a Scott Accent hard tail bike and the result is wonderful.
Over 100 miles in 4 days up big hills and down dales. Love it. Thanks

 

[London Pie]

Here are some facts and figures for the Golden Motor hub motors:

Smart Pie 4
Max phase current: 50A
Continuous current: 18A
Open Voltage: 20V - 60V
Rated Power: 200-400W

Magic Pie 4
Max phase current: 80A
Continuous current: 30A
Open voltage: 20V-60V
Rated power: 500-1000W

Hi Hasse

Did you build the setup with the Smart Pie? I was looking at them on ebay - they look pretty good. How did you get on?

 

[Cyclezee]

For motor performance figures and to make comparisons check Grin Technologies Motor Simulator
http://www.ebikes.ca/tools/simulator.html

 

[London Pie]

Sounds like you know your stuff Cyclezee - unfortunately it's a bit hard to understand for me as a newbie to this subject - it seems like a minefield out there.
What I'm looking for is a light weight (within reason) small front hub drive kit. That I can boost up to 17mph (to stay legal) , but also help up the hills. I like my bike simple and clean looking, an almost invisible kit would be ideal, with a small bottle battery. I'm not too bothered about battery length as I would plan to just ride if it ran out. I had a quick look at your website but couldn't see anything within my price range - I'm looking about £500 all in

 

[Cyclezee]

Hi London Pie,

There are of course kits out there within your budget just not from us

My suggestion would be to check out Oxydrive http://www.oxydrive.co.uk

Please note that I have no connection or affiliation with Oxydrive whereas some advice given on the forum comes from supposedly non trade members who do have connections with the brands that they recommend.

 

[London Pie]

Thanks Cyclezee - they look good and the price is nice. Do you know anything about them or did you just come across them?

 

[trex]

...
What I'm looking for is a light weight (within reason) small front hub drive kit. That I can boost up to 17mph (to stay legal) , but also help up the hills. I like my bike simple and clean looking, an almost invisible kit would be ideal, with a small bottle battery. I'm not too bothered about battery length as I would plan to just ride if it ran out. I had a quick look at your website but couldn't see anything within my price range - I'm looking about £500 all in

Not front hub drive but good performance and street legal: woosh GSM crank drive kit with 11.6AH downtube battery for £499.

http://wooshbikes.co.uk/?cdkit#gsmkit

 

[Cyclezee]

Thanks Cyclezee - they look good and the price is nice. Do you know anything about them or did you just come across them?

Hi London Pie,

I don't have personal experience of the Oxydrive kits, but this thread speaks for itself http://www.pedelecs.co.uk/forum/threads/oxydrive-kits.19746/

The Oxydrive is tried, tested and better value for money than the one mentioned above.

One thing to note when buying a kit is the length of warranty, as far as I am aware Cyclezee are the only company in the UK to offer more than one year.

 

[trex]

Besides technical differences, the Oxygen kits are above LP's budget, £599 for the front motor, £699 for the more powerful CST rear motor.
http://www.oxydrive.co.uk/store/#!/~/product/id=63979&prid=0&ctid=3&scid=2&tp=pl

 

[Cyclezee]

Besides technical differences, the Oxygen kits are above LP's budget, £599 for the front motor, £699 for the more powerful CST rear motor.
http://www.oxydrive.co.uk/store/#!/~/product/id=63979&prid=0&ctid=3&scid=2&tp=pl

Not if you check the prices via this link http://www.oxydrive.co.uk

 

[trex]

Clicking on the link of either kit, you don't get the special price, the site shows in stock status and its normal price. Try it for yourself.

 

[Cyclezee]

Clicking on the link of either kit, you don't get the special price, the site shows in stock status and its normal price. Try it for yourself.

OK, clearly an error on their website, I stand corrected.

 

[London Pie]

Thanks guys. I'm sure I can find another £99 if I really have to, but wouldn't want to go over that. Personally I prefer the look of hub drive units, I think they are a bit cleaner looking. Although I've read mid drive has more torque and is better for hill climbing. It's a bit vain I know, but I don't want to create a machine with wires and boxes all over the place. Integrated batteries and controllers are great - although that woosh battery looks huge!

 

[Cyclezee]

Hi London Pie,

Sorry about getting the price wrong, but even so I don't think you will find a better quality kit for the money.