If you go to 48 V I would leave the controller at 14-15 Amps. If you stay at 36 V then 17 Amps is a good compromise between extra power and decent range. I ran for a while at 18 Amps x 37 V and frankly now I am at a smidgen over 15 Amps and there isn't much difference in daily use. Yes you will be a bit faster off the line with higher current.

Sound advice anotherkiwi.

I'd fear tanking it up to 20A paired with 48V battery could over egg out slightly to the detriment of lifespan. Also, are Greenway happy to warranty the motor etc. If these changes are made, or are you not bothered about that for the experimental fun you'll be having?

 

Please can somebody confirm the motor power ratings stamped on these motors? It's just that if the 350W continuous rating is detailed (as it needs to be by law) on the motor, it puts it outside the UK's EAPC regs for road use.

 

Sent from here to there with computer wizardry.

Agree here too, go to 16amps first and see how it performs and then incrementally up to 18.

Not forgetting with a BBS its easy to swap over the controller you fry it, Max drive are their controllers available to buy and how easy to replace ?

Here's another option within the EU. I don't know how much shipping would be, but there are a few different upgrade options that could make this interesting to some people:

https://www.eljoybikes.com/eljoy-hifi

Price is £1100 in basic form (+ an unspecified amount to get it to the UK).

Please can somebody confirm the motor power ratings stamped on these motors?

See post #52 here (picture): http://www.pedelecs.co.uk/forum/threads/the-best-legal-ebike-kit.26480/page-3#post-352354

 

And post #22 on this thread (gives a link to another forum discussion) which suggests 250/350w versions are the same.

See post #52 here (picture): http://www.pedelecs.co.uk/forum/threads/the-best-legal-ebike-kit.26480/page-3#post-352354

 

And post #22 on this thread (gives a link to another forum discussion) which suggests 250/350w versions are the same.

 

Thanks Cyclebuddy.

So what is actually stamped on these Greenway bike's Max drive motors? i.e. 33.250 or 33.350 or 33.250/350?

A photo from an owner would be great if possible please?

I ask because Ultrafunkula stated " ...these greenway come with the 33.350 not the 33.250 motor so take 36.43,48v and at 48v will run 350w nominal I believe..."

Thanks

Are they THIS or THIS ?

It kind of has a bearing as to whether they would be considered legal in the UK as EAPC or not, potentially even if the motor was the larger (350W) power rating but programmed to a lower power.

Here's Ultrafunkula's pic from that other thread:

 

Here's Ultrafunkula's pic from that other thread:

 

[ATTACH=full]17472[/ATTACH]

You beauty

Exactly what I wanted to see. Thanks again Cyclebuddy.

Yep, lovin that photo, Bafang Max Drive all the way now, will be installing my Rohloff igh into a Max Drive bike.

Yep, lovin that photo, Bafang Max Drive all the way now, will be installing my Rohloff igh into a Max Drive bike.

Sounds like a great build you have planned, will look forward to the updates and photos

Personally, I'm still all about the BBSxx motor range.

At present there are not many frames built specifically for the Max drive that interest me. The ability to move to another 68/73mm frame is brilliant in my mind. Ti and Reynolds tubed frames being my faves, and the ride of the resulting bike is hard to beat when compared to aluminium. Quality build frames from recognised manufacturers with proven geometry and durability takes it every time. I know some find the BBSxx motor 'ugly' compared to the sleek lines and integration of the Max drive, but I think they're very neat, compact, light and look pretty cool.

In time I REALLY hope to see more frame manufacturers seeking to develop frames for Max drives.

Then there's the PAS / torque sensor difference. Here again I like the PAS on the BBSxx over torque sensor.

Yep brightonebikes, I can see the future being that you can buy a Max Drive compatible frame, manufactured for different disciplines and from differing materials.

 

My current pedal power only Ti bike frame/forks came from Tilon in China.

 

Tilon made me a very nice Rohloff specific frame, I think making a Max Drive frame would be a walk in the park for Tilon, and I will be dropping them a line to see what they think.

Sounds like a great build you have planned, will look forward to the updates and photos

Personally, I'm still all about the BBSxx motor range.

At present there are not many frames built specifically for the Max drive that interest me. The ability to move to another 68/73mm frame is brilliant in my mind. Ti and Reynolds tubed frames being my faves, and the ride of the resulting bike is hard to beat when compared to aluminium. Quality build frames from recognised manufacturers with proven geometry and durability takes it every time. I know some find the BBSxx motor 'ugly' compared to the sleek lines and integration of the Max drive, but I think they're very neat, compact, light and look pretty cool.

In time I REALLY hope to see more frame manufacturers seeking to develop frames for Max drives.

Then there's the PAS / torque sensor difference. Here again I like the PAS on the BBSxx over torque sensor.

 

 

Maybe it is time for a controller design that can accept all types of sensor inputs and the output be user selectable to ensure maximum efficiency for the prevailing riding conditions - best of all worlds.

Sound advice anotherkiwi.

I'd fear tanking it up to 20A paired with 48V battery could over egg out slightly to the detriment of lifespan. Also, are Greenway happy to warranty the motor etc. If these changes are made, or are you not bothered about that for the experimental fun you'll be having?

 

Please can somebody confirm the motor power ratings stamped on these motors? It's just that if the 350W continuous rating is detailed (as it needs to be by law) on the motor, it puts it outside the UK's EAPC regs for road use.

 

Sent from here to there with computer wizardry.

The motor is detailed 36v 250w 14a, Bafang website lists that as the mm33.250 but looking at motor number on this greenway it is the 33.350 , this is listed in components section of Bafang website , the kit lists a 33.250 only , so they must of supplied the manufacturer with motors, batteries,display as separate items instead of a specific kit, it's all uk road legal at the 36v with E compliance, and 15mph , I just changed my speed limit setting coz I like to be able to skidaddle if needs arise,if it was 48v I believe it would be S Pedelec.

What size chain ring did yours come with? Ebay listing suggests 44t? But I think yours was smaller?

 

Likewise ebay says "7 Speed", but lists a 9 speed Cassette part number. How many gears have you got?

What size chain ring did yours come with? Ebay listing suggests 44t? But I think yours was smaller?

 

Likewise ebay says "7 Speed", but lists a 9 speed Cassette part number. How many gears have you got?

Came with a 38t and 9 gears on the rear, I have a 44t from my MTB that I had knocking about that I tried and was pretty pleased with, now trying the 48t , notice the 38t behind the 48,

Glad to hear 9 gears on the back - I didn't think it could possibly be 7 speed.

38T chainring is not good news though - cheap enough to change (like you, I probably have one in the garage)

Hmmm,the 1000 watt Max Drive is only 3mm longer than the 250,wonder if I could squeeze it into the same mounting.

http://www.szbaf.com/en/components/component/motor/mm-g33250cb.html

Hmmm,the 1000 watt Max Drive is only 3mm longer than the 250,wonder if I could squeeze it into the same mounting.

http://www.szbaf.com/en/components/component/motor/mm-g33250cb.html

I reckon it will fit in same mounting, they like to make things simple and cost effective, it'll be a monster, not sure whether they have started production run yet,

My gut feeling is that if you can't keep up a cadence of at least 70-80 you are going to put too much strain on the motor (controller) with a larger chainwheel. Then again you may not be in an area where you risk stalling the motor in bottom gear as I am.

 

With 42:11 I am able to pedal to about 47 km/h (29 mph) before spinning out which means a cadence between 80 and 90. At that speed the aerodynamic wall kicks in when you are sitting up anyway so I didn't see the point of going any larger. I am looking at a trike with a 26" rear wheel and there 50 or a 48 tooth makes more sense.

 

The 38 tooth standard chainwheel is a good compromise for town use. I am waiting for the weather window to really test my 32 tooth up in the mountain.

AKW, the G510.1000 has 150/170/210 RPM for 43V/48V/60V and would make an ideal e-bike. It will of course need to be registered and insured.

With 42:11 I am able to pedal to about 47 km/h (29 mph) before spinning out which means a cadence between 80 and 90.

 

Agree - 42:11 is what I am hoping for when the bike arrives - if not I will give 38:11 a try. My (non-assisted) road bike is 50:11 - I guess I only use that gear when going downhill!

I reckon it will fit in same mounting, they like to make things simple and cost effective, it'll be a monster, not sure whether they have started production run yet,

 

Monster is correct.

 

Theoretical top speed:

At 100% efficiency (185RPM)

on a 26" wheel

with a 44t front and 11t rear chainring

 

it's possible to achieve 57.2mph.

 

Assume the motor is 70% efficient, and 40.1mph is a potential top speed.

I noticed that JOBO Electric Bike (Jinhua JOBO Technology Co LTD) started producing a Bafang Max Drive Ebike 700c wheel back in 2015.

 

Nice integrated 36v 11.6Ah battery pack Panasonic/Samsung cells.

 

The JOBO could well be another £1000 ebike, and I am suprised that none have arrived in the UK already.

we'll see more of them this year (and a lot).