I Can't STOP!!!!! Bigger brakes?

[magudaman]

I recently finished and broke my latest creation and as I wait for parts I want to iron out some serious kinks. One important problem I encountered was from removing my rear brake to attach a sprocket, is stopping after a serious downhill. My bike weighs about 95lbs and I am now at about 200lbs and it puts quite a bit of strain on my 8in hayes nine front brake. Any fresh ideas how to get some more braking power. I recently found that there are Hayes 9in rotors but I'm not sure if that will be enough. Oh the front hub is 20mm axle so some of the dual disk options are out too, maybe motor cycle parts?

 

[gestalt]

I just ordered a rear disk system for a 150cc pit bike to adapt to my bike. What I like is the pads are a great deal larger than mountain bike versions, also they are hydraulic and $45 shipped.

 

[michaelplogue]

Have you considered a plug/coil/resistance brake?

http://endless-sphere.com/forums/viewtopic.php?f=2&t=10422&hilit=+plug+brake

.

 

[Metallover]

So do you have no brakes in the rear? Get some decent v-brakes. I have some Avid Single Digit 5's and they are awesome. (granted Me and my bike weigh only 220lbs) They have a higher end model v-brakes too. Avid also makes some disc brakes, the bb7 brakes, which are said to be better then the hayes.

And until you get new brakes on, try to help you front disc brakes out a little. Clean the rotor with rubbing alcohol. Make sure your cable is moving freely. Adjust the brakes so you get the maximum pulling power. I have mine so they stop about half an inch from the grip then if I really tug on it I can bring it within a centimeter.

 

[dontsendbubbamail]

If you have a steel frame brazing on some cantilever bosses would not be too hard.

Bubba

 

[Scorefield]

Found these and maybe they will be something for you.

 

[johnrobholmes]

Looks like a 20mm dual disc front hub on that flier.

 

[magudaman]

Have you considered a plug/coil/resistance brake?

http://endless-sphere.com/forums/viewtopic.php?f=2&t=10422&hilit=+plug+brake

.

I have and originally wanted to have regen but my chain design won't permit it :-(



Frame is aluminum through out, and rims are disk only, so really there is no easy way to braze on mounts or anything. Even if I did get a dual disk hub there are no mounts for another caliber and my fork tube are some sort of aluminum again.

If I go with different brand of brakes with more calibers, I don't think it will help. Unless the contact area is larger I don't think it will help except for providing more quicker stopping but not more capacity.

I think I may look into just getting that 9in disk and if that doesn't work out I may try going to mini bike or motorcycle parts after that. Thanks for all the help everyone!

 

[swbluto]

The large problem with bicycle discs is their weight. Despite popular opinion, light brakes ARE NOT good. Well, not if you have a high powered e-bike. For higher energy demands, you definitely want something a bit more heavier to absorb more energy before over-heating. A greater surface area resulting from a larger rotor may help as it'll improve the heat transfer, but I'm going to hazard a guess that brakes don't dissipate heat nearly as fast as people brake with.


Good v-brakes would help, too, as rims should have more mass than the typical disc brake and they have for more exposure to air which should help cooling.

 

[recumpence]

You must have some really funky off brand disc brakes. Typical disc brakes (Avid are the best mechanical disc brakes from my perspective) have extremely good stopping power even for a heavy e-bike. Just switch to Avids (even 160mm) and you will not have any more problems. Some off brand disc brakes really suck........

Matt

 

[zenon]

Yes Avid BB7 will solve your problem check this link were i got a pair for my new tadpole build and its on sale right now.
Its available on 160/185 mm both same price around 45 usd . Grab the 185mm rotor they are same price with 160mm rotor.
Comes with rotor disk brake and adaptors, also see review.

Also press add cart to see the actual prize
http://www.jensonusa.com/store/product/BR291C01-Avid+Bb7+Mechanical+Disc+Brake+09.aspx



Cheer's

Zenon