• Bloody seals on the Shimano rear calliper have gone again! I think this is the 3rd time on the particular bike - the only Shimano disc brake bike I have. Rear brake is super ineffective and squeaky, which is exactly what it's done previously when this has happened.

    It is a decent age, so has ST-RS505 levers and the matching 505 callipers, which was 105 level at the time. I'd like to not have to replace my hoses at the same time I stick a new calliper on. As little fuss as possible is my MO.

    Looking at the various compatibility charts, looks like me only options are the 505, 785, or 808 callipers. If I wanted to use anything more modern I'd need to change to the BH90 hose.

    Could a disc brake guru just shout if I've got that wrong, and does anyone know if between any of those 3 options any of them is less likely to mess up and leak oil all over again?

    Or is the more modern stuff just way better at not dropping the seals, and I really should consider upgrading to something like the 7070 calliper with the BH90 hose?

  • Nah, the hoses are pretty much the same, you'll just need to get the correct barbs.

    You can probably even just reused the barb and olive as it is and just plonk a new caliper on there.

    Flat mount caliper?

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