Subrosa Street Rail A Frame Kit BlackThe Subrosa Street Rail A Frame Kit. This awesome upgrade to your Subrosa Street Rail will allow you to swap the legs of your Street Rail and install the rest of the A frame parts to the center of your Street rail to create a ridiculously good A Frame rail. This kit is sold separately from the Street Rail and is made exclusively to work with your already existing rail. An additional 4 feet added to your Subrosa Street Rail 16" 30" Height & 2" round A