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No chain and infinite gears - Oyo e-bike with hydraulic drivetrain hits crowdfunding target

6 comments

3 weeks 1 day ago

Just seen from the owners - apparently it weighs 25kg surprise There are cargo bikes that weigh less! 

3 weeks 4 days ago

I wonder how many tons it weighs? And the efficiency question is likely the killer. Chain-drive is 95+% efficient. Even if this achieves 90% efficiency you're going to notice even with 250W in the motor. Although I assume the motor bypasses the hydraulic bit and is plugged straight into the rear hub which would help a bit!

3 weeks 5 days ago

What is it about crowdfunding that encourages people to reïnvent the wheel?

3 weeks 5 days ago

Haha. Soma fully hydraulic transmission, but mechanical disk brakes?

makes sense. Fluids are messy Wink

3 weeks 5 days ago

"we guarantee it, but just to be sure we give you a three year warranty"

So they warrant their guarantee?

Regardless, sounds interesting. My first thought also was how much is lost in the hydraulic drive. But on reflection, I don't suppose the target market cares too much. So long as the battery is good for the efficiency losses, then the other advantages all come to the fore. But if it does turn out to be super efficient then its application to regular bikes would be really interesting.

3 weeks 5 days ago

No more bleeding gears. Wait!