Questions about brakes

skyeg3

New member
I'm building an off-road wheelchair and I'm using a 1" go kart axle in the rear. I'm using downhill mountain bike brakes in the front pushed by a brembo master cylinder. I was planning on integrating a caliper into that brake system but it seems there will be challenges with that specifically the fact that the bicycle brakes use mineral oil and the kart brakes use DOT fluid. Also I'm afraid the front brakes are more sensitive and will come on harder than the rear. So I'm planning on using a separate master cylinder for the rear brake now. My question is about these master cylinders with two lines coming out of them. Are these lines connected hydraulically? Meaning if one of the lines breaks is pressure lost in the other as well? I also have a question about these 1 or 2 line brake calipers. Do the one line calipers tend to rub on the rotor on the non piston side? Would hate to hear rubbing of the rotor when the brake is supposed to be disengaged.
 

Ted Hamilton

Design Drafter / Racer
Yes, the twin ports go to a common piston....break in one line equals loss of pressure everywhere. What's driving the choice of MTB brakes in the front? There are kart brakes available that have a smaller (6") rotor, if neccesary. MCP fronts may even be smaller than that... Sounds like a fun project. Interested to see pics.
 

Ted Hamilton

Design Drafter / Racer
Keep the MTB discs so you don't have to do custom hub machining, but look at the chinese kart calipers that are built for single piston and skinny rotors.... They're also cheaper.

 

TNKarter

New member
I'm building an off-road wheelchair and I'm using a 1" go kart axle in the rear. I'm using downhill mountain bike brakes in the front pushed by a brembo master cylinder. I was planning on integrating a caliper into that brake system but it seems there will be challenges with that specifically the fact that the bicycle brakes use mineral oil and the kart brakes use DOT fluid. Also I'm afraid the front brakes are more sensitive and will come on harder than the rear. So I'm planning on using a separate master cylinder for the rear brake now. My question is about these master cylinders with two lines coming out of them. Are these lines connected hydraulically? Meaning if one of the lines breaks is pressure lost in the other as well? I also have a question about these 1 or 2 line brake calipers. Do the one line calipers tend to rub on the rotor on the non piston side? Would hate to hear rubbing of the rotor when the brake is supposed to be disengaged.
Check out HAYES mountain bike disc brakes. They use DOT fluid. Probably could adapt their calipers to your system.
 

XXX#40

TRUMP 2020
Keep the MTB discs so you don't have to do custom hub machining, but look at the chinese kart calipers that are built for single piston and skinny rotors.... They're also cheaper.

Buy 2 of these kits, or just buy 4 calipers and 2 masters and use stainless flex lines from Russell
 
Top