US Sourced MAC or EZEE motor

[INSJBLM]

Is there a US-based option to purchase either of these motors that is not GRIN? GRIN in Canada is too expensive, and I'm not interested in Regen. Also, how do these motors compare?

 

[indianajo]

For mac, no, except for occasional defective motors on ebay. I bought a mac8t rear geared hub last summer off ebay. What was wrong with it, the threads at the end of the axle were cross-threaded. Easily correctable with a triangle file. Since it was a rear motor, I bought it for the clutch to repair my 2019 mac12t front hub, which was incredibly competent at climbiing the hills around here until rain destroyed the wire harness & controller 7/2021. DO NOT ever buy an ASI controller, they are suitable only for riding in deserts where it never rains. Took me 2 years to figure out how to disassemble the Mac12t and replace the harness from the circuit board out. The clutch had been changed between 2019 and the rear motor, so I was not able to salvage the one from the 8t for the 12t. Clutch would slip about 1/3 of the time with an ebikeling 1300w controller. My new 2000 w controller adds power gradually, so it is not as useful for crossing a 6 lane highway at a light that never turns green for bicycles. But it does not make the clutch slip.
Bing can find a mac hubmotor listing on alibaba, but the minimum buy is 8, so I have not seen fit to donate my birthdate and debit card # to the land of hackers & counterfeiters. 48 v 1000 w Mac12t is the best motor I have found for powering up 15% hills around here with 70 lb groceries or ag chemicals on my cargo bike. Being bigger in diameter than a 140 mm brake disk and having an offset that requires grinding down the brake caliper to engage are reasons perhaps no US dealer will stock it. Beside 1000 w being illegal on road in 41 states and people in mountainous states overusing the abundant power and burning up the windings. Southern. Indiana hills are rollers, about 100' long max. I cross 77 of them on the way to my summer camp, perfectly reliably. Except for a wimpy 350 w bafang motor that I burned the winding powering at 48 v instead of nominal 36. .

 

[INSJBLM]

For mac, no, except for occasional defective motors on ebay. I bought a mac8t rear geared hub last summer off ebay. What was wrong with it, the threads at the end of the axle were cross-threaded. Easily correctable with a triangle file. Since it was a rear motor, I bought it for the clutch to repair my 2019 mac12t front hub, which was incredibly competent at climbiing the hills around here until rain destroyed the wire harness & controller 7/2021. DO NOT ever buy an ASI controller, they are suitable only for riding in deserts where it never rains. Took me 2 years to figure out how to disassemble the Mac12t and replace the harness from the circuit board out. The clutch had been changed between 2019 and the rear motor, so I was not able to salvage the one from the 8t for the 12t. Clutch would slip about 1/3 of the time with an ebikeling 1300w controller. My new 2000 w controller adds power gradually, so it is not as useful for crossing a 6 lane highway at a light that never turns green for bicycles. But it does not make the clutch slip.
Bing can find a mac hubmotor listing on alibaba, but the minimum buy is 8, so I have not seen fit to donate my birthdate and debit card # to the land of hackers & counterfeiters. 48 v 1000 w Mac12t is the best motor I have found for powering up 15% hills around here with 70 lb groceries or ag chemicals on my cargo bike. Being bigger in diameter than a 140 mm brake disk and having an offset that requires grinding down the brake caliper to engage are reasons perhaps no US dealer will stock it. Beside 1000 w being illegal on road in 41 states and people in mountainous states overusing the abundant power and burning up the windings. Southern. Indiana hills are rollers, about 100' long max. I cross 77 of them on the way to my summer camp, perfectly reliably. Except for a wimpy 350 w bafang motor that I burned the winding powering at 48 v instead of nominal 36. .

Thanks for the heads up!

 

[harryS]

Well, it's nice to own motors that has been quantified for Grins simulator like the Ezee and Mac. Grins simulator will tell you exactly how they compare. I suppose the attraction of Grin's product is that you can model your model for extreme situations and compute performance. You'll know how how steep a hill you can climb and how many minutes before the motor melts.

If your performance needs are modest, then many hub motors will probably run your bike fine.

 

[INSJBLM]

Well, it's nice to own motors that has been quantified for Grins simulator like the Ezee and Mac. Grins simulator will tell you exactly how they compare. I suppose the attraction of Grin's product is that you can model your model for extreme situations and compute performance. You'll know how how steep a hill you can climb and how many minutes before the motor melts.

If your performance needs are modest, then many hub motors will probably run your bike fine.

 

[INSJBLM]

Hello,

I too am a fan of Grin, but for this build, Grin would not be a good alternative. I purchased a ready-to-ride kit from Grin, which is a kit that is pre-programmed and should be plug-and-play onto a bike. In this case, I ran into two different recalls on both the controller and the motor. Grin was not able to figure out whether or not it was a software or hardware issue after 5 months of back-and-forth communication. They received the motor and the controller, tried to repair and reprogram them, and sent them back out, but they still did not work.

Despite all of that, I am still a fan of Grin, but they need to work out the issues they are having with V6 Phase Runners.

Thank you,