Quote from: wkindred on May 06, 2021, 06:02:31 AM

Quote from: springer03 on May 05, 2021, 11:34:31 AM
So after a ride last week with my wife we made it 39 miles with the stock rad battery, making it back just short of our car before the batteries cut off.
I've decided to upgrade our batteries on our bikes to get greater range. We will be getting 4 batteries, 2 each, so we both can bring a spare. I've been looking at the 52v batteries to get the most range.

We have already upgraded to the Bolton controller and Bafang 750 motor. (Radrover 5 and Radrunner Plus)

I'm looking at the Fat shark 52v 17.5ah batteries and noticed different Bms(30 and 40)and different max burst/max discharge amps(50,60 and 85a)
I don't really care about more power/speed so much(although it wouldn't hurt ), as most of our riding is on a mostly level rail trail using pedal assist 2 and the controller and motor upgrade has made any of the steep hills around my neighborhood no problem.



Would any of these outputs make much of a difference in range using only pedal assist? (with limited throttle use)
Would the 85a max burst be to much for a 35a controller?

Thanks!
Springer03

the battery with the highest max burst rate will likely have a slight speed and range advantage.

the max burst rating of a battery is the max power the battery can provide for short periods. the max draw of the 35a controller is 35a. as long as the max burst rating of the battery is well over 35a there should be no issues.

Thanks!
Just wanted to be sure before I ordered.

So after a ride last week with my wife we made it 39 miles with the stock rad battery, making it back just short of our car before the batteries cut off.
I've decided to upgrade our batteries on our bikes to get greater range. We will be getting 4 batteries, 2 each, so we both can bring a spare. I've been looking at the 52v batteries to get the most range.

We have already upgraded to the Bolton controller and Bafang 750 motor. (Radrover 5 and Radrunner Plus)

I'm looking at the Fat shark 52v 17.5ah batteries and noticed different Bms(30 and 40)and different max burst/max discharge amps(50,60 and 85a)
I don't really care about more power/speed so much(although it wouldn't hurt ), as most of our riding is on a mostly level rail trail using pedal assist 2 and the controller and motor upgrade has made any of the steep hills around my neighborhood no problem.
Would any of these outputs make much of a difference in range using only pedal assist? (with limited throttle use)
Would the 85a max burst be to much for a 35a controller?

Thanks!
Springer03

Thanks again!

Quote from: JTK77 on March 18, 2021, 01:34:18 PM

Quote from: springer03 on March 18, 2021, 11:34:23 AM
Getting ready to swap Bolton 750w motor into my Radrover, and have read adding a little extra white lithium grease to the gears is suggested.
Anybody know what grade should be used, or if it matters?
I've found both NLGI 1.5 and NLGI 2 grade white lithium grease.
Thanks

The best best option is Mobil SHC 100 (red). Mobil-28 is also good.
I'm using SHC100.

Thanks. Should I remove, wipe off as much as I can of what is already on there or is it ok to mix?

Getting ready to swap Bolton 750w motor into my Radrover, and have read adding a little extra white lithium grease to the gears is suggested.
Anybody know what grade should be used, or if it matters?
I've found both NLGI 1.5 and NLGI 2 grade white lithium grease.
Thanks

Quote from: JTK77 on March 02, 2021, 10:32:09 AM

Quote from: springer03 on March 02, 2021, 09:25:23 AM

Quote from: JTK77 on March 02, 2021, 08:55:50 AM

Quote from: springer03 on March 02, 2021, 06:35:07 AM

Quote from: JTK77 on February 03, 2021, 09:34:59 PM

Quote from: fin_rad on February 03, 2021, 08:01:41 PM

Quote from: Altema on January 20, 2021, 11:30:39 AM
The Bafang model number is RM G060.750.D 06
Rad controller limits the motor power. The Rad motor internal RPM limiter limits the speed.

Is there any stamps on the motor (inside or outside) where I could identify which model the motor is? Just being curious and interested in learning how the ebike systems work.

The meaning of Bafang model markings:
G060 = casing identification
750 = nominal rating
D = freewheel (DC = freehub)
(6) = winding identification (smaller is faster, no it directly equal to KV)

All Power versions within same casing series are swappable.
Rated model not possible to say what from casing as OEM customers can have custom labeling or motor core can ne swapped.
Rad has done both. In the past casing swap (+sticker) and nowadays custom labeling.
KV can ne identified by no load speed (wheel of the ground full throttle) If you have the throttle.

I have one last question, I ordered 2 motors, one from Bolton and one from Electro Bike World, the one from Bolton is marked RM G060.750.D 06 with a little sticker with 26"/700c/28" BLDC for e-bike A4 and the one from Electro Bike World is marked RM G060.750.D 06 1 with sticker reading 20" BLDC for e-bike A5.
Does the "1" at the end on the second motor mean anything?
Do you know if these motors are identical?
I'm guessing they are but figured it wouldn't hurt to ask.

Thanks!

I have not aware If the "1" has some relevant meaning.
The indication of 20" wheel well describes the higher KV of that motor. The way you can compare these motors once installed is to set wheel diameter to same value on both bikes. Set speed limiter to 72 km/h or on stock controller Set wheel diam. to 20". Run bikes full throttle (full batteries) rear wheel of the ground. Compare Max speed values.

Thanks, I'm pretty new to this, 1 is going on a 20" wheel bike and 1 on a 26" wheel bike, if the one marked 20" has a higher kv,  would it give more low end torque on the 26" bike?
I'm trying to figure out which motor to put on which bike. 
Thanks so much

Yes. Higher Kv is higher speed. So putting that on 20" bike will even the differences (speed and torque) between the bikes. Not necessarily make them exactly identical though as Kv differenfe may not 100% compensate wheel size difference.

Thank you, I think I finally got it,
Higher kv=higher speed, lower torque
Lower kv=higher torque, lower speed
Put the 20 on the 20 will get more speed, and the 26 on the 26 will get more torque,  which will mostly even the difference of wheel size.
Thanks again!

Quote from: JTK77 on March 02, 2021, 08:55:50 AM

Quote from: springer03 on March 02, 2021, 06:35:07 AM

Quote from: JTK77 on February 03, 2021, 09:34:59 PM

Quote from: fin_rad on February 03, 2021, 08:01:41 PM

Quote from: Altema on January 20, 2021, 11:30:39 AM
The Bafang model number is RM G060.750.D 06
Rad controller limits the motor power. The Rad motor internal RPM limiter limits the speed.

Is there any stamps on the motor (inside or outside) where I could identify which model the motor is? Just being curious and interested in learning how the ebike systems work.

The meaning of Bafang model markings:
G060 = casing identification
750 = nominal rating
D = freewheel (DC = freehub)
(6) = winding identification (smaller is faster, no it directly equal to KV)

All Power versions within same casing series are swappable.
Rated model not possible to say what from casing as OEM customers can have custom labeling or motor core can ne swapped.
Rad has done both. In the past casing swap (+sticker) and nowadays custom labeling.
KV can ne identified by no load speed (wheel of the ground full throttle) If you have the throttle.

I have one last question, I ordered 2 motors, one from Bolton and one from Electro Bike World, the one from Bolton is marked RM G060.750.D 06 with a little sticker with 26"/700c/28" BLDC for e-bike A4 and the one from Electro Bike World is marked RM G060.750.D 06 1 with sticker reading 20" BLDC for e-bike A5.
Does the "1" at the end on the second motor mean anything?
Do you know if these motors are identical?
I'm guessing they are but figured it wouldn't hurt to ask.

Thanks!

I have not aware If the "1" has some relevant meaning.
The indication of 20" wheel well describes the higher KV of that motor. The way you can compare these motors once installed is to set wheel diameter to same value on both bikes. Set speed limiter to 72 km/h or on stock controller Set wheel diam. to 20". Run bikes full throttle (full batteries) rear wheel of the ground. Compare Max speed values.

Thanks, I'm pretty new to this, 1 is going on a 20" wheel bike and 1 on a 26" wheel bike, if the one marked 20" has a higher kv,  would it give more low end torque on the 26" bike?
I'm trying to figure out which motor to put on which bike. 
Thanks so much

Quote from: JTK77 on February 03, 2021, 09:34:59 PM

Quote from: fin_rad on February 03, 2021, 08:01:41 PM

Quote from: Altema on January 20, 2021, 11:30:39 AM
The Bafang model number is RM G060.750.D 06
Rad controller limits the motor power. The Rad motor internal RPM limiter limits the speed.

Is there any stamps on the motor (inside or outside) where I could identify which model the motor is? Just being curious and interested in learning how the ebike systems work.

The meaning of Bafang model markings:
G060 = casing identification
750 = nominal rating
D = freewheel (DC = freehub)
(6) = winding identification (smaller is faster, no it directly equal to KV)

All Power versions within same casing series are swappable.
Rated model not possible to say what from casing as OEM customers can have custom labeling or motor core can ne swapped.
Rad has done both. In the past casing swap (+sticker) and nowadays custom labeling.
KV can ne identified by no load speed (wheel of the ground full throttle) If you have the throttle.

I have one last question, I ordered 2 motors, one from Bolton and one from Electro Bike World, the one from Bolton is marked RM G060.750.D 06 with a little sticker with 26"/700c/28" BLDC for e-bike A4 and the one from Electro Bike World is marked RM G060.750.D 06 1 with sticker reading 20" BLDC for e-bike A5.
Does the "1" at the end on the second motor mean anything?
Do you know if these motors are identical?
I'm guessing they are but figured it wouldn't hurt to ask.

Thanks!

Quote from: JTK77 on February 13, 2021, 11:04:21 PM

Quote from: springer03 on February 13, 2021, 09:22:58 AM
OK, I have another question, I've been reading and trying to understand the relation of the number of strand bundles to torque and speed.
If I understand correctly the 750w (6) will have a slightly higher top speed and lower, low speed torque?
And the 750w (7) will have slightly higher low speed torque?
I ask because I live in a area with a lot of steep hills and I have some nerve damage in my legs and don't have a lot of strength for hard pedaling.
I have the 2020 Radrover (26 inch Wheels) and my wife has the Radrunner Plus (20 inch wheels) Which if I understand correctly it
is better on hills than the 26 inch wheels.
If having the (7) strand version would be a little more helpful on inclines I'll just install the (6) on her bike and order The (7) for mine.
I guess what I'm asking is, will the (7) be better on hills and will the (6) be faster?
Will the (7) have a better 0 to 20mph time? The (6) have better 20+ acceleration?

Thanks!

Yes, you are right. This is the simulation of (6) and  (7) on Rover with 52v full battery. I have to remind I may not have the kv of (6) right on the last digit but very close. So what you can see is torque difference of ~10% below 5 mph and other way round  solid 10Nm above 25 mph (Max 2 mph topspeed difference). Identical performance between 5 to 25 mph.

Thanks!
That graph explains exactly what I was wondering.
I went ahead and ordered the 7 for mine, as I would prefer the extra torque down low and will put the 6 in my wife's.  Was going  to upgrade hers down the line anyways.
Thanks again!

OK, I have another question, I've been reading and trying to understand the relation of the number of strand bundles to torque and speed.
If I understand correctly the 750w (6) will have a slightly higher top speed and lower, low speed torque?
And the 750w (7) will have slightly higher low speed torque?
I ask because I live in a area with a lot of steep hills and I have some nerve damage in my legs and don't have a lot of strength for hard pedaling.
I have the 2020 Radrover (26 inch Wheels) and my wife has the Radrunner Plus (20 inch wheels) Which if I understand correctly it
is better on hills than the 26 inch wheels.
If having the (7) strand version would be a little more helpful on inclines I'll just install the (6) on her bike and order The (7) for mine.
I guess what I'm asking is, will the (7) be better on hills and will the (6) be faster?
Will the (7) have a better 0 to 20mph time? The (6) have better 20+ acceleration?

Thanks!

Quote from: Altema on February 08, 2021, 07:09:49 AM

Quote from: springer03 on February 07, 2021, 02:18:38 PM
Do you think the 7 strand version would equal the size difference? And have any "noticeable" feel in your hill climb test?
Just curious, I'm not going to bother exchanging for a small difference.  I would have upgraded the motor for the increased speed anyway but more torque would have been nice.

The locked rotor and low RPM torque of the Rad motor is a bit better, but the upgrade motor feels like it has a fatter torque curve above 10 mph. In the hill climb test, the Rad motor does better from a dead stop or from a very low RPM. I had to put one food down for stability because the back tire was slipping and chewing up the grass (sorry city workers!). The upgrade motor made it up the 28% grade also, but without quite as much authority.

But, severe hill climbs are a niche scenario, and once you get above a few MPH, the upgrade motor becomes more fun. I'm choosing to keep the upgrade motor in because I have more situations where the top end is important.

Thanks
If I seen this thread before I ordered it I probably would have ordered Electric bike worlds motor with the 7 strand instead of 6, but I'm sure I'll be happy with the upgrade from stock. Once I get the new controller kit I'll put them in at the same time.
Thanks for taking the time for your testing 👍

Altema
The windings are bigger in the Rad motor. I've pulled the motors the rest of the way apart and measured them directly. The stator coil windings on the Rad motor are 0.65mm in diameter. On the upgrade motor they are 0.55mm.
[/quote]

Do you think the 7 strand version would equal the size difference? And have any "noticeable" feel in your hill climb test?
Just curious, I'm not going to bother exchanging for a small difference.  I would have upgraded the motor for the increased speed anyway but more torque would have been nice.

JTK77,
Thanks but I haven't  installed it yet, I just received it and I am still waiting for the controller/display upgrade kit(back ordered)
I was just wondering if it was worth exchanging for the (7)
I didn't know how much 1 strand difference would make relating to torque when climbing hills.
If it's a small difference I'm not going to worry about it.
Thanks for the offer though!

Quote from: JTK77 on February 03, 2021, 09:34:59 PM

Quote from: fin_rad on February 03, 2021, 08:01:41 PM

Quote from: Altema on January 20, 2021, 11:30:39 AM
The Bafang model number is RM G060.750.D 06
Rad controller limits the motor power. The Rad motor internal RPM limiter limits the speed.

Is there any stamps on the motor (inside or outside) where I could identify which model the motor is? Just being curious and interested in learning how the ebike systems work.

The meaning of Bafang model markings:
G060 = casing identification
750 = nominal rating
D = freewheel (DC = freehub)
(6) = winding identification (smaller is faster, no it directly equal to KV)

All Power versions within same casing series are swappable.
Rated model not possible to say what from casing as OEM customers can have custom labeling or motor core can ne swapped.
Rad has done both. In the past casing swap (+sticker) and nowadays custom labeling.
KV can ne identified by no load speed (wheel of the ground full throttle) If you have the throttle.

I just received this same motor RMG06 48V750W(6) from Bolton for my radrover 5 and had noticed the one Electric bike world sells is RMG06 48V750W(7)
would there be a noticeable difference in torque between the two? On hills?

I would have preferred more torque for hills, but would rather not return the one I already have if the difference is minimal and not really noticeable.

(I also do have the 35amp controller on order)
Thanks.