I'm looking at handbrakes and there are specs that go along with them, what does the 16x18 and the 19x18 mean, I guess it's some kind of ratio but for what?

 

the first number is the diameter of the cylinder, in mm. The second number is the distance between the pivot and the cylinder.

 

+1
I have 16x19 kinda want more any one have experience between these two??

16x19 shorty brake

and

18x19 forged clutch

 

ok...... so if I have this right the first # equals cylinder diameter, I assume the bigger the cylinder the more stopping power you will have.

The distance between the cylinder and the pivot effects???? how much pressure is needed use the brake???? more distance means more pressure????

 

the diameter isn't to be confused with power. basically you match it with the system. if you have a 1 caliper 1 piston system you have a low volume high pressure system. with that system a smaller piston works better, IE: handbrake, supermoto 1 caliper front brake, etc.

for high volume low pressure, multiple calipers and multiple pistons (4 pot, 6 pot) then you need a larger diameter piston to move more fluid but it will be at a lower pressure due to the increased diameter.

the piston throw, which is the second number, is the MM measurement of how far the piston travels. obviously, longer means it pushes more fluid per stroke. You get more feel with a longer pull, but it takes move movement of the lever to get to that point of full pressure.

hope that helps.

also, the 16mm piston i believe is only offered from brembo in the 18mm stroke, hence the reason everyone uses a 16x18 for handbrake. the 18mm piston is overed in many strokes so you have more to choose from, shorter pull with more pressure, or longer pull with more feel.

 

Thanks for the breakdown.

 

np

it can be a little confusing at times.

 

Does anyone know if there are internal differences between a hydraulic clutch lever and a brake lever. I would assume there isn't but I've heard that they won't work good for brakes. Is there a common stroke and bore size for clutch masters?

 

I was under the assumption that clutch sides worked better cuz you dont have to worry about flipping them upside down????

I am planning on using a 2006 1000rr clutch master for my hb setup!

 

not just "clutch side" ...he's asking about the actual clutch masters.

that is a good question. i don't think they'll work. they seem to have a considerably smaller piston. when looking at the rc51 hydraulic clutch, the physical size of the clutch master shows that the piston inside couldn't be very big.

also, they run on mineral oil, not brake fluid, so there would be a huge problem running that into a caliper that wants brake fluid. i know the seals on the clutch master will be destroyed by brake fluid.

 

Ok, this has me confused a little. I was under the assumption that people used hydrolic clutch masters such as the 1000rr clutch for a hb setup. Now your making me second guess things. I know people run brembo clutch masters.....wouldnt this be the same thing?!?!

Thanks for the info though

 

no, hydraulic clutch masters run on mineral oil, not brake fluid. it actually has a huge warning right on the resevouir lid.

running brake fluid in it will destroy the seals.....and if you ran mineral oil through the brake calipers, well, i dont know what that would do. i do know that mineral oil will boil super fast though.

plus, clutch masters i'm pretty sure are a lot smaller in size compaired to a brake master. they aren't made to put a lot of pressure since they are only moving springs, not stopping a bike. i don't know their piston size, but you can see the physical outside of it wouldn't allow it to be very big of a piston.

 

Ive heard 13 mm from a couple unreliable sources

 

well how the **** and why the **** do some people say get a clutch side master ????

 

They're talking about a master that is made for the left clipon so you don't have to turn it upside down which makes bleeding and keeping the air out easier when bleeding directly from the handbrake master. I know Brembo and Magura have that option.

 

wat the **** lol that sucks ***** hahaha

 

No, actually it is the ****.

 

The brembo forged 18x19 made for the clutch side

Seems like it may be stronger but feel more stiff like a brick

Does any know or think that it would use something besides brake fluid?
Liek the mineral you are talking about? Just do to to the fact it was made for the clutch

Opposed to the 16x19 cast from a dirt bike front brake

More feel softer just as or just about eaqually strong,

Why not run the stronger one bigger piston and it is forged so it is stronger

it only a $60 difference

 

Guess its good I brought it up...lol

 

The brembo clutch side runs brake fluid not mineral oil