Less than 1 minute ago
\r\n \r\n The main difference in master cylinder size as it relates to our use:
\n
\n- 19 and 20 mm masters are typically used to drive (2) four piston calipers
\n- 16mm are typically used on a singe four piston caliper (some bikes only have 1 disc)
\n- 13mm is typically used on a one or two piston caliper
\n
\nThis is due to the amount of fluid that the master\'s bore is designed to move to the calipers.
\n
\nWhat does this mean to us? well, for handbrake purposes, you would match the master size to the handbrake caliper size as appropriate or choose a different size based on the feel that you are looking for.
\n
\ni.e. A Large master used on a small caliper will have a very hard feel with little lever travel as it is trying to move a lot of fluid and has nowhere to move it to. Conversely, if you used a 13mm master with a four piston caliper, you will have a very soft lever with lots of travel (which some may like better as more variable control).
\n
\nYou can see how this can be a factor in the new "dual quad" (2 four piston) hand brake set ups that some are trying now. Even upgrading from dual stock caliper to a four piston will change the feel in your lever.\r\n
\n
\n- 19 and 20 mm masters are typically used to drive (2) four piston calipers
\n- 16mm are typically used on a singe four piston caliper (some bikes only have 1 disc)
\n- 13mm is typically used on a one or two piston caliper
\n
\nThis is due to the amount of fluid that the master\'s bore is designed to move to the calipers.
\n
\nWhat does this mean to us? well, for handbrake purposes, you would match the master size to the handbrake caliper size as appropriate or choose a different size based on the feel that you are looking for.
\n
\ni.e. A Large master used on a small caliper will have a very hard feel with little lever travel as it is trying to move a lot of fluid and has nowhere to move it to. Conversely, if you used a 13mm master with a four piston caliper, you will have a very soft lever with lots of travel (which some may like better as more variable control).
\n
\nYou can see how this can be a factor in the new "dual quad" (2 four piston) hand brake set ups that some are trying now. Even upgrading from dual stock caliper to a four piston will change the feel in your lever.\r\n