Direct Drive motor vs. central motor for a motorbike / QS138 90H vs. DD55

General Discussion about large electric scooters and motorcycles and other things with no pedals.
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Jil   100 W

100 W
Posts: 152
Joined: Sep 07 2017 3:24pm
Location: Bordeaux, France

Direct Drive motor vs. central motor for a motorbike / QS138 90H vs. DD55

Post by Jil » Jan 14 2021 11:23am

Hello,

Do you know what is the impact in terms of handling & comfort (on & off road) of installing a central motor vs. a rear direct drive hub motor ? I'm talking about the suspended weight which will be much higher with a hub motor.

The choice would be between QS138 90H and DD55 (if you see more suitable motors to get around 8-10 kW continuous power, tell me !).

For its simplicity, durability and silence, the hub motor has my preference, but I don't know if it will be suitable on trails (I'm talking about light off-road, not extreme enduro and backflips :wink: ).
My bike : Surly "eKrampus" with GMAC 8T, Phaserunner and 20 Ah/52 V Li-ion battery.

Grantmac   10 kW

10 kW
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Joined: Oct 22 2018 12:43pm
Location: Victoria, BC

Re: Direct Drive motor vs. central motor for a motorbike / QS138 90H vs. DD55

Post by Grantmac » Jan 14 2021 12:06pm

No contest. Hub motors simply aren't good off smooth pavement.
Actually they aren't good for any real performance setup. We had a discussion recently about this in the Ebike general forum.

Jil   100 W

100 W
Posts: 152
Joined: Sep 07 2017 3:24pm
Location: Bordeaux, France

Re: Direct Drive motor vs. central motor for a motorbike / QS138 90H vs. DD55

Post by Jil » Jan 14 2021 1:16pm

Thanks :thumb:
My bike : Surly "eKrampus" with GMAC 8T, Phaserunner and 20 Ah/52 V Li-ion battery.

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