There are hundreds of threads on various MTB forums complaining of Shimano calipers weeping fluid past/through pistons and contaminating pads - wouldn't be surprised if this was the same. Seems to happen when they've been left alone for a while, but no-one is really sure what the actual cause is
There are hundreds of threads on various MTB forums complaining of Shimano calipers weeping fluid past/through pistons and contaminating pads - wouldn't be surprised if this was the same. Seems to happen when they've been left alone for a while, but no-one is really sure what the actual cause is