I want a FAST eBike

Timpo

Well-Known Member
This morning, one of those Greg LeMond wanna be guys all decked out in spandex and seated on a carbon fiber racing type bike was behind me at a stop light. I was on my $600 250W eBike. I smoked him on the acceleration, but his higher gearing meant that he passed me pretty quickly after 20MPH was reached.

This is not acceptable! I'm still gonna retain the current eBike because it's great for hauling stuff, but the fun of furiously pedaling and going as fast as I could was a blast.

So how can I build a fast eBike using a kit that will get me 30 to 40 mph quickly for $600? I don't need a ton of range, just something to get me 5 or 10 miles while I troll for yuppies on bikes. Do I need 1000w of power, or 1500? I figure a non geared hub motor on the back would be in that price range w/ a battery. Has anyone built such a bike? Is this the best way to go, or is a geared motor better? I'm a little concerned about a big hub motor fitting into the chain stays back there on a donor bike, along w/ getting the freewheel or cassette to work.

Going to a front hub motor would simplify everything enormously, but is that a good idea w/ a powerful motor? I'm thinking the handling would be sub optimal, and if you powered it on too much in a curve, watch out.
Here, 5 mile range ebike

 

WilliamT

Active Member
I think the cheapest way to just get speed may be to just purchase a Cyclone 3000. Run that at 40 amps and connect to a quality 52v controller.


You can also achieve your goal with a BBS02. My folding bike has 20 inch wheels, 52t chain ring and has a top speed of 36 mph.

You can only get there by throttling because the gears are not high enough to get you to that speed by pedaling. This bike is nuts.

It has so much torque that in the wrong gear it will wheelie and throw you off the bike if you don't hold on tight.

Its configured by Luna to run at 1200+ watts. I had a 52v 17ah battery in the bag when running at 36 mph.
 

Attachments

FlatSix911

Well-Known Member
Why not just get a 60 mph moped and be done with it... ;)


1590346824948.png
 

Timpo

Well-Known Member
Why not just get a 60 mph moped and be done with it... ;)


View attachment 53276
That's out of his $600 budget.
 
Last edited:

smorgasbord

Well-Known Member
This morning, one of those Greg LeMond wanna be guys all decked out in spandex and seated on a carbon fiber racing type bike was behind me at a stop light. I was on my $600 250W eBike. I smoked him on the acceleration, but his higher gearing meant that he passed me pretty quickly after 20MPH was reached.
What a coincidence! I was in a coffee bar in Albuquerque around then, where some analog bicyclists were relaxing after their morning ride. They were having a grand time, joking about the ride, who's gotten faster or slower or bought new wheels, etc. One of the guys then said: "Today was my best ride, ever! Some old dude on an electric bike actually tried drag racing me at a stop light. He got off the line quickly, but I beat him soundly and didn't have look back. I've been riding for years now, building up my strength, and while the health benefits of road riding have been great, beating this guy on his e-bike just made my day. Thanks to my riding regimen, I can eat whatever I want and still stay trim enough to wear these silly looking but practical riding suits. He's probably off having beer after beer complaining about the world and trying to scrape up enough money to beat me next time. I'll just stay in shape and be ready for him next time."