Brakes

Started by 636steve, August 08, 2016, 11:05:49 AM

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David W

Quote from: 636steve on August 10, 2016, 09:17:33 AM
Also anyone got a simple exlanation of what the ratio number mean i.e 19x20? what is a standard one normally?
19 is the piston/bore diameter in mm.
20 is the distance between the pivot and the centre of piston in mm.
19x20 gives less power and less lever travel.
19x18 gives more power (leverage) with more lever travel.
Rule of thumb is that 19x20 is recommended for roadbikes and 19x18 tends to be used by racers.
Saying all that I had a 19x18 Brembo on my SP2 and it worked well.
Some lever can be swapped between the two ratios now.  Which is nice.

636steve

Quote from: David W on August 10, 2016, 08:38:15 PM
Quote from: 636steve on August 10, 2016, 09:17:33 AM
Also anyone got a simple exlanation of what the ratio number mean i.e 19x20? what is a standard one normally?
19 is the piston/bore diameter in mm.
20 is the distance between the pivot and the centre of piston in mm.
19x20 gives less power and less lever travel.
19x18 gives more power (leverage) with more lever travel.
Rule of thumb is that 19x20 is recommended for roadbikes and 19x18 tends to be used by racers.
Saying all that I had a 19x18 Brembo on my SP2 and it worked well.
Some lever can be swapped between the two ratios now.  Which is nice.

Thanks makes sense. The accossatos can be adjusted between 19x17,18 and 19.
Think I might have an expensive weekend.

MOzZereLLa

Brembo also do an adjustable ratio lever.
Significantly faster than you.....