CrossCurrent motor options - will I see improvement?

[Timpo]

So I have a CrossCurrent Air with CCS controller.
I do not have a budget to spend $ on GMAC + Phaserunner, I'm thinking about simply replacing the motor.
Although it may not happen soon, I just want to start looking around, because when my motor is done, I want to use that excuse to replace the motor.

The stock CrossCurrent motor is Bafang SWX02 motor
It 's rate at 350W, has 45Nm of torque, reduction ratio of 5:1, 180-350rpm.

Bafang SWX02 motor electric bike motor 36 V/48V 350 W/500W rear drive cassette body

This Bafang SWX02 rear-drive motor, which is compatible with the disc brake, has a rated power of 350 W, a reduction ratio of 1: 5 and a maximum torque of 45 N.m, providing ideal power for vehicles. This motor is suitable fortouring bikes, commuter bikes,city bikes and mountain bikes. It can be...

motowoks.com

and I have been wondering simply switching the motor will improve the performance of bike.

Bafang RM G360
It has 12.8:1 reduction ratio.
I had been used on Surface 604 Shred, which is pretty fast bike at 32mph top speed.
However, the Surface 604 has12MOSFET 12A controller, would I see any improvement just by switching the motor?

This product is no longer available.

This product is no longer available.

www.alibaba.com

Bafang RM G360.500.DC rear drive motor 500W cassette

This Bafang RM G360.500.DC rear drive motor 500W cassette ebike motor, which is compatible with the disc brake inner rotor, has a rated power of 500W, a reduction ratio of 1: 12.8 and a maximum torque of 50 N.m, providing ideal power for vehicles. This motor is suitable fortouring bikes...

motowoks.com

Bafang RM G04
Sold by Eunorau (and I'm sure it's been sold elsewhere too)
It caught my attention because it has been advertised to 65Nm of torque. Which is a significant improvement.
But Eunorau seems to be a bit inconsistent with the torque rating..
The interesting thing is, the prices seem to differ quite a bit between CSTand BPM. (I'm guessing it means cassette and freewheel?)

BAFANG Rear 48V500W CST Hub Cassette Motor

All Motors with 1 speed magnet integrated Bafang rear 48V500W CST hub cassette motor for electric bicycle Brand Name EUNORAU Voltage 48V Design Brushless Wattage > 400w Motor Type Brushless Gear Hub Motor SKU 8FUN-CST-48 Type RM G04.500.DC Rated Power 500W Rated Voltage 48V Efficiency ≥80%...

eunorau-ebike.com

189.0US $ |Screw Freewheel 48v 500w Bafang Bpm Gear Hub Motor High Speed E-bike Rear Motor - Electric Bicycle Motor - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Bafang G310
I get the impression that the G310 isn't really a performance oriented motor.
Grin recommends not to use more than 700W max.
I have feeling this is a very entry level motor? Because Grin has GMAC, I don't think they need higher performance Bafang.

MG310_Fst - Rear - Hub Motors - Ebike Parts - Shop

<p>The Bafang G310 motor is a compact disk compatible 2.5kg rear hub with a nominal 250-350 watt power rating that works great for stealthy systems that do not require significant assist for steep hills or cargo. This motor includes an internal 6-pole spe

www.ebikes.ca

MG310_Std - Rear - Hub Motors - Ebike Parts - Shop

<p><span>The Bafang G310 motor is a compact disk compatible 2.5kg rear hub with a nominal 250-350 watt power rating that works great for stealthy systems that do not require significant assist for steep hills or cargo. This motor includes an internal 6-po

www.ebikes.ca

 

[AHicks]

Why not add something like a MAC 12t to your list to research? Check out the torque available there....

Some motivation for going that route might be to update that motor further down the line using GMAC components - when they are able to sell them seperately. My understanding is they are in pretty short supply at the moment.

 

[AHicks]

Didn't say GMAC. I said MAC. Purchase a MAC with the potential you could update it later, to a GMAC. Way more torque on tap with a 12T than the numbers you are showing.

MAC shouldn't be much more to buy or install than some of the Bafang drives you're considering. Or is it?

 

[AHicks]

I was thinking you wouldn't even have to buy a controller right away - just the motor. Is your bike set up with an external controller, or internal? If external, why not use it over again?

If you were in need of an inexpensive 35a controller, you could do a lot worse than something like a KT with whatever display they offer that might appeal (there are several, though the LCD3 is pretty popular). Check out the pricing, with or without accessories that come match wired to allow plug and play everywhere but the battery (xt-90) and the motor.

36V/48V 1000W-1500W 12Mosfets 35A Brushless DC Torque Simulation Square Wave Controller - PSWPOWER.com

www.pswpower.com

 

[AHicks]

With bikes, a little overhead/extra capacity controller won't hurt a thing. It just means tougher to burn out because of more rugged components and better heat dissipation. And speaking of heat dissipation, that's going to be better when it's got good airflow moving over it.

I have a 20 amp max set in my controller parameters, so though it's rated for up to 35, it'll never see that kind of demand. The issue I have is the battery wiring, and likely the BMS, is too small to pass more than 20a safely. It might for a few minutes, but it's going to heat up quickly. It's no issue really, because I rarely need that kind of power


When you say "internal", is the controller built into the motor, or hidden out of normal line of sight?

 

[AHicks]

20a x 50v=1000w

That's plenty for most occasions, but there's plenty of reserve available when/if necessary.
Because the MAC can handle it, does not mean you have to run it there. Mine doesn't see more that 2-300w most times I'm out. A big hill or a short burst of wide open throttle to get across a busy intersection would be 2 examples of when it's nice to have the extra power on tap.....