• As those are hydraulic you'll only need shift cables. Shift cables are always compressionless. I'd imagine those would come with some? (I couldn't be bothered to read the product desc.).

  • 1 pair dual control lever ST-RS505 + BR-RS505 brakes
    mineral oil (2 x 50ml)
    shifting cables
    braking cables
    OT-SP41 shifting housing
    

    Seems to be the case - I'm assuming there are little/no gains to be made with something Jagwire cables?

  • No point, standard Shimano stuff work perfectly well, as long it's trimmed nicely, not too long/short, etc. it will shift great.

    It's only with cable operated disc calipers is where compressionless housing can make a difference (as well with mini-v and occasionally v brake with road levers).

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