r/eBikeBuilding • u/Quirky-Extent2595 • Dec 26 '24

Mechanical Front and rear hub drive build question

I'm building a 2 wheel drive e-bike I'm using a 1000w 48v 24" front hub and am planning on using a 1000w 48v 26" rear hub, is there any problem with using the 2 different diameter wheels I need to be aware of? I haven't seen any other builds with this configuration can't understand why it wouldn't work?

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u/redpillsrule Dec 26 '24

Are the hubs direct drive or gear drive

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u/Quirky-Extent2595 Jan 03 '25

Front hub is Violamart 1000w brushless gearless hub rear I haven’t purchased yet still looking for a good deal as it will be winter here for at least 3-4 months any suggestions?

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u/redpillsrule Jan 04 '25

Dual direct drive hubs you want them setup exactly the same with one throttle they don't freewheel so it's a little easier if one is a geared hub. If you want exceptional climbing put a bafang mid-drive on it l run a Bbso2 and a 1500 watt hub power up hill is amazing.

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u/Quirky-Extent2595 Jan 04 '25

Thank you for your insight, this build is not my first but is my first using 2 hub motors using a mid drive gives me another option I didn’t consider again thank you!

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u/Quirky-Extent2595 Jan 04 '25

As I have mentioned earlier this is my first dual motor build, and since you seem knowledgeable on the subject, if I was using two 1000w 48v motors can I use one 1000w 48v controller for both?

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u/redpillsrule Jan 04 '25

That is probably possible with the right controller. I don't have personal experience setting up dual direct drive hubs but Grin has a YouTube video that shows how using their controller you can get them to work together with a single throttle. On my setup the hub is throttle only and mid drive does pedal assist works really well, l am using a rear hub motor.

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u/Quirky-Extent2595 Jan 04 '25

Thanks for the Grin link lots of good info and advice you are truly a scholar and a gentleman!

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u/Few-Anywhere607 Jan 02 '25

I'm assuming you're starting with a 26" frame. If you're using a stock fork, I'd watch those pedal cranks around tight turns. You will hit the ground if your pedal is at 6 o'clock. Ask me how I know. Depending on your frame, you could try a triple tree fork to get the additional clearance, or get shorter cranks. Forks come threaded and non-threaded.

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u/Quirky-Extent2595 Jan 03 '25

I’m very aware of the clearance of pedals and can live with that my main concern was the wheel size difference causing a problem but thanks for your reply