aboveandbelow69 said:
Hi all i'm building a high powered e bike. I am unsure if normal bicycle disc brakes will be enough to stop me if i'm going high speeds.
Depends.
What do *you* call "high-powered"?
What do *you* call "high speeds"?
What is the total mass being stopped?
What kind of tires/wheels? (if there's not enough contact patch, and the wheel skids, it doesn't matter how much more brake you have; you've already braked as hard as you possibly can).
What are some of the differences between bicycle disk brakes and motorcycle?
Size, weight, cost, stopping power, variety, etc.
Note that you can't use MC brakes on bike frames and forks and wheels without custom-building adapters for both calipers and rotors. (it's been done; there's at least one thread somewhere about that).
has anyone here built a high powered e bike?
There are many high powered bikes here, including motorcycles and larger. I recommend looking around at the various build threads, and threads like Your Creations' before and after pics thread, etc., to get an idea of what's been done.
There are also threads like the "i'm a noob and wanna go 50mph" thread, which have many links to discussions about brakes/etc.
THere are also many separate threads about brakes, forks, wheels, threads, etc.
To narrow down the search to something readable in a reasonable time, you can search in just topic/thread titles, and display by topic/thread, for each of the single-word things you're after. And to find brakes, use brake* instead, so it finds both.