how fast can those ebike go?

[yuval120360]

im planning on buying some secondhand ebike i found online.
i wanted to know how fast you think it can go and if you think i can climb hills with it.
its a brushless 250W engine powered by a 24v 10 amps li-po battery.
the bike weight is 22 kilograms and my weight is 73 kilograms.

and another question, what parts can i buy to upgrade the bike's speed?

 

[cwah]

20-25km/h

 

[dogman dan]

Not fast. It will go up hills you would be able to pedal up anyway, but easier. Likely 5% grades would be the max it comfortably climbs. Maybe more if it has 20" wheels.

To upgrade, replace everything.

Here's the deal, it's a bike intended for assist, not riding like a small motorcycle or moped. It might be all that is legal where you live.

To go fast, you need 48v minimum, with a motor able to take more power. A 20 amps controller with 48v gets you 1000w at least. This will climb pretty steep hills with no pedaling, like 10% grades. Best of course to pedal when it's above 5% though.

 

[d8veh]

Have a look at this thread on the UK forum that shows how a similar bike was speeded up to 31 mph. In standard form, it's 15 mph and 5% hill-climbing. The motors can take a lot more.
http://www.pedelecs.co.uk/forum/electric-bicycles/9857-cyclamatic-beastamatic-dead-long-live-beastamatic.html

The missing photos are here:
http://s451.photobucket.com/user/d8veh/library/Beastamatic?sort=3&page=1

 

[Motorman64]

Hi mate if your up for a bike I'm just gonna put my 30mph Cube mountain bike up for grabs.???
Cheers mark

 

[eva-michael]

For second hand ebike, you should also ask the seller about how many cycle this battery pack has been uses. And how many capacity is still left when full charge.

 

[torker]

Battery at 36 volts first . Of course that costs as much has the bike maybe :?

 

[dogman dan]

Ok, maybe just replace everything except the motor. Then go melt the motor if you really hot rodded it. It's fun.

But yes, chances are that with a new controller and battery, that motor can tolerate 48v and 15 amps of controller pretty good. Double the voltage would be the plan for sure. Just don't go crazy on the amps and put a 48v 40 amps controller on it. Should be able to get a small 48v controller straight from china very cheap.

Fairly likely the 24v controller has 30v capacitors in it, so it's a crap shoot just trying more volts with everything else the same.