Electrified Downhill bike
 

I got in some hub motors a few weeks back and laced up a wheel for myself. I ended up mounting it into my old downhill bike for grins and giggles, and so I would have cheap transportation around town. Works out to about a penny per 9 miles of travel at 20mph.

specs:

Rear geared brushless PM motor
Castle HV110 controller
12s2p a123
Magura throttle
Santa Cruz Bullit
Marzocchi Super T fork
Built up by me

Right now it is about 20mph on 36v. I have 12 more a123 cells so I can bump it up to 48v. Yesss, feel the power!! It already pulls wheelies....

Just curious but what do you figure your total cost to be?

Nice job BTW.

what is your average runtime?

Total cost of what? Electrics for the conversion are $800ish with the a123. Batteries are the bulk of the cost generally.

about 12 miles best guess, I haven't ran it down all of the way. A trip to town and back (8 miles) is about half of the capacity. This is going 20mph. If I add voltage and go faster my watt/hour/mile goes down.

Total for conversion minus the bike. I know some people that are interested in doing this and since I am into electric RC they asked my opinion.

For cheaper electronics you can get by with $500 no batteries. For more expensive electronics $600 or more is easy to spend, and you can get lighter with RC electronics. Add batteries on top, and that will be an additional $120 to $200 for lead acid and $500 to $2000 for lithium depending on range and voltage that they want.

That looks sweet. Do you do much downhill? I use to have a GT DHi

Not much downhill in missouri. I used to ride it urban a lot.

How many kv has that motor? That looks cool btw! Make a vid of it! :D

Been thinking about converting a hardtail for a while now, but decided to spend my money on an Ibis ($2700 with XT). Gonna go and pay for it on monday. Pretty good deal I thought.

That seat looks painful! :oh: :lol:

thats cool

that is awsome you should get a crystalyght motor but how does your magura throttle run your hv110

Thought I would post up another little project of mine. This guy is my campus cruiser. same hub motor as on my downhill bike, but laced into a 16" wheel and overvolted to 24s a123. Mighty powerful!

It uses a china made Ebike controller and throttle. Last night I realized that the throttle grip sucks and it was making my hand hurt!

Very nice! :yes:

I wouldn't mind doing a few projects like this myself.