The max speed is 80. You can brake at any time .
^ what Drew said. The only times the brakes don't work is on the way up on the chain. You can go as slow or as fast as you want. (Just don't come to a stop, that would be bad for you and the person behind you.....)
I was told the max speed you can reach is 27mph. You can brake anywhere on the track to go as fast/slow as you like.
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