Brembo Basics
12-01-2007, 10:12 PM
#1
Brembo Basics
Ok here it goes. I've have gotten tons of emails and pm's etc... on what the brembo numbers mean lately. Thought I would go through a quick tutorial for all the newbie out there who are going to ask. :YEAH
16x18 Example
Let take the 16x18 as an example. The first value which is 16 represents the diameter or bore of the cylinder in millimeters The second value which is 18, represents the distance between the lever's pivot point and the plunger that pushes into the cylinder
What Do These Numbers Really Mean?
1.)Cylinder diameter (The 16)
a.As you increase your cylinder diameter you increase the volume of fluid. By doing this, you are decreasing the pressure which results in less braking power but better feel.
b.The trade off is that since your increasing the sensitivity of the lever your decreasing the braking power which we will now discuss in the 2nd number
2.)Pivot Point (The 18)
a.As you increase the pivot point, the sensitivity is increasing but your breaking power is now decreasing.
b.By increasing this number, the pivot point is larger and now you have reduced your leverage for braking power thus reducing your breaking power
What Do Brembo Numbers Really Mean
Let take the 16x18 as an example. The first value which is 16 represents the diameter or bore of the cylinder in millimeters The second value which is 18, represents the distance between the lever's pivot point and the plunger that pushes into the cylinder
What Do These Numbers Really Mean?
1.)Cylinder diameter (The 16)
a.As you increase your cylinder diameter you increase the volume of fluid. By doing this, you are decreasing the pressure which results in less braking power but better feel.
b.The trade off is that since your increasing the sensitivity of the lever your decreasing the braking power which we will now discuss in the 2nd number
2.)Pivot Point (The 18)
a.As you increase the pivot point, the sensitivity is increasing but your breaking power is now decreasing.
b.By increasing this number, the pivot point is larger and now you have reduced your leverage for braking power thus reducing your breaking power
12-01-2007, 10:55 PM
#3
12-01-2007, 11:33 PM
#4
Registered User
Join Date: Mar 2006
Location: hazlet, NJ
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12-02-2007, 01:26 AM
#5
brabuhburbuh
Join Date: Oct 2005
Location: NY
Age: 41
Posts: 2,830
Re: Brembo Basics
i am not clear as to what you are saying. a lever is one of the 6 simple machines and it allows you to trade force for distance performing the same amount of work but on a different scale. the larger the bore the more fluid you will push. what has to do with the feel is the leverage. more distance = more feel and less work, shorter distance = more work, and less feel.
12-02-2007, 07:40 AM
#7
Jim CrashoBazzi
Join Date: Dec 2006
Location: Downers Grove, IL
Age: 37
Posts: 2,523
Re: Brembo Basics
I know a buddy that did it but was way to much work, he just already had it at his hosue and wanted to get riding right away. you better off just getting the front brake off of water bikes gota remote resivore.
12-02-2007, 10:04 AM
#8
Re: Brembo Basics
i am not clear as to what you are saying. a lever is one of the 6 simple machines and it allows you to trade force for distance performing the same amount of work but on a different scale. the larger the bore the more fluid you will push. what has to do with the feel is the leverage. more distance = more feel and less work, shorter distance = more work, and less feel.
12-02-2007, 02:04 PM
#9
Registered User
Join Date: Jun 2004
Location: Toronto
Age: 42
Posts: 3,289
Re: Brembo Basics
The bore is measured in standard not metric so its 3/4"(.75) that is roughly
19mm's and the pivot is roughly 21mm.....So its roughly a 19x21.....
Smaller bore does not mean less power! This is all relative to the bore size and number of pistons of the calipers...Multi big psiton calipers require larger bore masters to feed them. Smaller calipers need smaller bores....
All OEM rear masters are 11-14mm, that is the proper bore to feed a single or double piston rear calier. And thats why the smaller bore front masters work better, as the bore size is closer to what they should be...
Cant wait for my 13mm Magura
19mm's and the pivot is roughly 21mm.....So its roughly a 19x21.....
Smaller bore does not mean less power! This is all relative to the bore size and number of pistons of the calipers...Multi big psiton calipers require larger bore masters to feed them. Smaller calipers need smaller bores....
All OEM rear masters are 11-14mm, that is the proper bore to feed a single or double piston rear calier. And thats why the smaller bore front masters work better, as the bore size is closer to what they should be...
Cant wait for my 13mm Magura
Last edited by JohnnyP; 12-02-2007 at 02:06 PM.
12-02-2007, 02:25 PM
#10
Re: Brembo Basics
The bore is measured in standard not metric so its 3/4"(.75) that is roughly
19mm's and the pivot is roughly 21mm.....So its roughly a 19x21.....
Smaller bore does not mean less power! This is all relative to the bore size and number of pistons of the calipers...Multi big psiton calipers require larger bore masters to feed them. Smaller calipers need smaller bores....
All OEM rear masters are 11-14mm, that is the proper bore to feed a single or double piston rear calier. And thats why the smaller bore front masters work better, as the bore size is closer to what they should be...
Cant wait for my 13mm Magura
19mm's and the pivot is roughly 21mm.....So its roughly a 19x21.....
Smaller bore does not mean less power! This is all relative to the bore size and number of pistons of the calipers...Multi big psiton calipers require larger bore masters to feed them. Smaller calipers need smaller bores....
All OEM rear masters are 11-14mm, that is the proper bore to feed a single or double piston rear calier. And thats why the smaller bore front masters work better, as the bore size is closer to what they should be...
Cant wait for my 13mm Magura
12-02-2007, 02:38 PM
#11
Registered User
Join Date: Jun 2004
Location: Toronto
Age: 42
Posts: 3,289
Re: Brembo Basics
You cant make a braod statement like "smaller bores = less power" without takin into account the whole setup(caliper bore #'s and size)...If you look into thumb brakes all of them are smaller then 16mm bore, because 11-14mm is the proper bore size for a master to feed a rear single or double piston caliper....Example Brembos thumbrake is 13mm
12-02-2007, 02:41 PM
#12
Re: Brembo Basics
Thats what Im tryin to say You cant make a braod statement like "smaller bores = less power" without takin into account the whole setup(caliper bore #'s and size)...
If you look into thumb brakes all of them are smaller then 16mm bore, because 11-14mm is the proper bore size for a master to feed a rear single or double piston caliper....Example Brembos thumbrake is 13mm
You cant make a braod statement like "smaller bores = less power" without takin into account the whole setup(caliper bore #'s and size)...If you look into thumb brakes all of them are smaller then 16mm bore, because 11-14mm is the proper bore size for a master to feed a rear single or double piston caliper....Example Brembos thumbrake is 13mm
I'm going to do a whole write up on the Brembo's and what everything really means because I get so many questions from people buying Radial MC's and they don't even know what they are buying half the time.
12-02-2007, 03:23 PM
#14
brabuhburbuh
Join Date: Oct 2005
Location: NY
Age: 41
Posts: 2,830
Re: Brembo Basics
that is what i use on my f4i and i can lock up the rear wheel with one finger. that and my rotor and pads are brand spanking new so my coasters are just pure butter. alot of my buddies have brembos and then they ride my bike and say wow your handbrake is so good.
12-02-2007, 03:36 PM
#15
Registered User
Join Date: Jun 2004
Location: Toronto
Age: 42
Posts: 3,289
Re: Brembo Basics
Radial master are better then regular style masters, so a 13mm reagular is not going to be as good as a 13mm radial style....
12-02-2007, 05:30 PM
#16
back in the saddle again
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Location: terre haute, IN
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Re: Brembo Basics
Ok here it goes. I've have gotten tons of emails and pm's etc... on what the brembo numbers mean lately. Thought I would go through a quick tutorial for all the newbie out there who are going to ask. :YEAH
16x18 Example
Let take the 16x18 as an example. The first value which is 16 represents the diameter or bore of the cylinder in millimeters The second value which is 18, represents the distance between the lever's pivot point and the plunger that pushes into the cylinder
What Do These Numbers Really Mean?
1.)Cylinder diameter (The 16)
a.As you increase your cylinder diameter you increase the volume of fluid. By doing this, you are decreasing the pressure which results in less braking power but better feel. b.The trade off is that since your increasing the sensitivity of the lever your decreasing the braking power which we will now discuss in the 2nd number
2.)Pivot Point (The 18)
a.As you increase the pivot point, the sensitivity is increasing but your breaking power is now decreasing.
b.By increasing this number, the pivot point is larger and now you have reduced your leverage for braking power thus reducing your breaking power
What Do Brembo Numbers Really Mean
Let take the 16x18 as an example. The first value which is 16 represents the diameter or bore of the cylinder in millimeters The second value which is 18, represents the distance between the lever's pivot point and the plunger that pushes into the cylinder
What Do These Numbers Really Mean?
1.)Cylinder diameter (The 16)
a.As you increase your cylinder diameter you increase the volume of fluid. By doing this, you are decreasing the pressure which results in less braking power but better feel. b.The trade off is that since your increasing the sensitivity of the lever your decreasing the braking power which we will now discuss in the 2nd number
2.)Pivot Point (The 18)
a.As you increase the pivot point, the sensitivity is increasing but your breaking power is now decreasing.
b.By increasing this number, the pivot point is larger and now you have reduced your leverage for braking power thus reducing your breaking power
as the diameter goes up it decreases the pressure but increases volume meaning it's a high volume system. this increases braking force when used with a multiple piston system IE: front 4 caliper dual brakes. bigger piston doesn't mean decreased braking, ti's increased braking, less feel...unless used with a single piston setup which is a high pressure, not high volume system.
it's basic physics and properties of pressure. that's why you use a small diameter for single piston calipers (high pressure) and a larger diameter for muliple caliper setups (high volume).
you get best braking power and feel when matching the 2 systems. you definately lose feel with a large dimeter piston. then you can increase sensitivity by increasing the pivot distance....requires you to pull the lever further, but it makes smaller increments therefore increasing the sensitivity.
12-02-2007, 10:37 PM
#17
Registered User
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Re: Brembo Basics
12-02-2007, 10:39 PM
#18
What happened to my blox?
Join Date: Jun 2006
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Age: 41
Posts: 13,412
Re: Brembo Basics
on my last f4i i had a 954 master and it was by far the best master i have ever ran, very good feel and braking power.
-mexican mayhem
12-03-2007, 12:48 PM
#19
back in the saddle again
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12-03-2007, 12:51 PM
#20
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