• Hydraulic disc fluid may vaporise if heated enough on long descents

    A good reason to fit a proper rear brake to share the load. Though I find it surprising, high dot brake fluid boils at over 200 degrees I think.

  • A good reason to fit a proper rear brake to share the load

    Or fit some brakes that won't fail catastrophically :)

    Though I find it surprising, high dot brake fluid boils at over 200 degrees I think.

    There's just a lot of energy to burn off on a fully loaded tandem, and the volume of fluid in a disc brake is tiny. When you consider the ambient temperature might be 30 deg or so and the descent might take thirty minutes or more, it's not so hard to believe.

    The plastics on BB7s typically melt when used on a tandem I've heard.

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