On the off chance that they’ve worn out to not precisely 33% of their exceptional thickness, so supplant them on the off chance that you have 1/64 inch (0.5 mm) or less of compound left on the support cushion. You will likewise have to supplant them if they have gotten polluted. This could be the aftereffect of a brake liquid release, imprudent oil of the drive chain or other ecological variables.
Bedding in spic and span brake cushions is fundamental. On the off chance that you skirt this assignment, you’ll see that you experience the ill effects of both poor braking and vanishing disk cushions. New cushions should be ‘cooked’ to eliminate compound buildups leftover from assembling and solidify the braking surface.
You do this by braking to warm up the cushion, at that point allowing it to cool, and rehashing until the braking execution improves, so discover someplace that you can ride securely without having exceptionally sharp brakes (i.e., not a bustling street or a lofty slope). At that point ride along gradually, before braking until you’ve almost come to an end. Rehash this cycle until the braking execution improves; it’s not abnormal for it to take 10 to 20 cycles. Know that the braking execution will improve unexpectedly, so do whatever it takes not to go over the bars!
When the cushions are all around slept within, they typically keep going quite a while. Precisely how long will rely upon the path conditions: dirty mud will destroy them quicker than soft, messy mud, while dry path could undoubtedly observe you riding similar path the entire summer, however in case you’re running sintered cushions you may find that they coat and require a quick scrape with sandpaper to improve the nibble and diminish the noise. Cushion establishment is comparative enough from brake to brake to give an overall review here conceivably.
It merits having a decent gander at your calliper before you begin dismantling anything, in any event, snapping a photo or drawing a quick sketch in case you’re stressed you may fail to remember what it ought to resemble.
Lamentably pretty much every brake model from each producer requires an alternate moulded brake cushion (there are exemptions — Shimano’s more up to date systems all utilization a similar cushion shape). Take the old cushion to the bike store if you’re uncertain of the brand and model names of your brake to ensure you get the correct substitutions.
Eliminating the old cushions
When in doubt, you need to eliminate the wheel to get at the cushions, and they fit into position using the focal space in the caliper, either from a similar course as the rotor or from the top. Each cushion sits against its piston inside the caliper.
At the point when you pull the brake switch (or expert chamber), every piston (or slave cylinder) is pushed out, taking the cushion with it until it contacts and eases back the rotor. Cushions have a level metal support plate, onto which the compound is fortified.
The hacking plate will generally have a metal tab that allows you to deal with it without expecting to contact the braking compound. Cushions can be left-or right-explicit, and however this data is at times stepped/scratched on the support plate, it’s wise to note what direction around the old ones go.
Stage 1: The cushions will be held set up by a screw, a magnet, a spring cut on the rear of the cushion or an exact fit in the caliper. Regularly, there is a type of auxiliary security gadget to stop the cushion dropping out if the primary fix should come up short, so eliminate this first.
Stage 2: Then eliminate the primary holding gadget, for this situation, a small hex wrench jolt.
Stage 3: Now the cushions are free, you can eliminate them — basically pull tenderly on the tabs, and they should come out with minimal more than a squirm. In case you’re not anticipating returning similar cushions to the caliper at that point use them to ensure the pistons as you push them back into the caliper body before you eliminate them.