FatMAC from Em3ev

Paul just started selling the fat bike equipped Mac 10T & 12T motors at em3ev.com . Paul is the place to go for Chinese motors and parts and is our preferred vendor for BBS02 units. I talked to him about 3 months ago about this project and I’m very excited to see it come to fruition.

The new Fat-Mac motors, the only real option for a fat-bike hub mounted motor

The new Fat-Mac motors, the current best option for a fat-bike hub mounted motor

From Paul

“The shaft is 175mm, as in 175mm dropout. It’s really quite simple, the shaft is longer than standard(which includes a bearing), to maintain the correct disc to dropout spacing In addition to this, there is more space on the freewheel side than normal, so you can fit a 10sp freewheel without any problem. The motor is reasonably centered in the axle. The hub itself is unchanged.

I’ve asked for a drawing of the finished motor, but I don’t have it yet. I don’t expect there will be any major issues making it work in a fat bike frame with anywhere from 170-185mm dropout, or thereabouts.”

To order the motor go here. For more info email orders@em3.ev.com . Thanks to saucisse from Endless Sphere  who thinks the new Fat Mac isn’t that much bigger than the regular Mac and it might be a little rude to call it fat.

The FatMAC has finally arrived. The axle is huge and should easily fit even a 205mm dropout. We bought this 12T motor to convert a Dolomite into a decent rental in town commuter. We’ll be posting a build thread in the coming weeks and will be having a smackdown between the 12T FatMac and the BBS02 750Watt Mid drive. Stay tuned.

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Fatty

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Who are you calling fat?

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Here are a few pictures to whet your appetite. It looks to be about a lb heavier than the standard Mac and the axle is MUCH wider. I suspect you will need to put spacers between the MAC and the disk rotor and will probably have to move the caliper out a bit as well. I find it is best to split the difference between the caliper spacing and the rotor spacing so all your washers are NOT on one or the other.

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Fat Mac vs the old Mac

 

 

 

10 thoughts on “FatMAC from Em3ev

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  6. Hello fellow who has created this site. I am in serious need of knowledge. I am better able to learn from direct contact talking and doing. Please contact me at my email. I am working a fat tire the dolomite mongoose. I am totally new to this world of ebike. I want big powerand longevity. Ihaven’t known of this tech. I was looking to build from scratch. Iam curious. I want to hit40 min up hill i know this has to be possible. I hardly see speed capabilities on motors i have researched.

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    • Go to em3ev.com . Everything you need is there.

      It is much harder to do a wheel build with a fatmac than it is to to a BBS02 conversion on a Dolomite. Look under the fatbike section for instructions on how to do this. endless-sphere.com is another great resource.

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