Motor size in 16" wheel

[Tangsoo]

Just dropped my MAC motor in to have it re-built into a 26" wheel (was in a 700c) as I've changed bike.

I asked the wheel builder if he thought the same motor (but a higher RPM) would fit into a Brompton 16" wheel, he didn't think so due to the diameter.

Any ideas what the max diameter would be? I was thinking of a Bafang BPM2 48v500 front motor but that's 180 OD too, like the MAC. Might have to go for a Q128?

 

[Tangsoo]

Forgot to say 100mm drop out width won't be an issue as i'm getting wider disk forks made. Decided not to go mid drive due to folding issues.

 

[trex]

the xiongda XD would be a good fit. They can do it in 360 RPM for you.

 

[Tangsoo]

Who does those?

 

[Deleted member 4366]

Cwah fitted a MAC to his brompton so it can be done.

 

[Tangsoo]

Need a battery for the mountain bike so think I'll go for a battery or two and a motor kit. Now 320 or 410 rpm..
Bums batteries don't much cheaper once you get to the higher current biggerAh packs.