Road Toad Music Pahoehoe Dreads Ukuele Bass Strings (Color) Pahoehoe Dreads. Colored Bass Strings for 20" to 21" scale instruments Instruments include Road Toad Big Bufo, Baby Bufo, Semi-hollow and Kala U-bass. Black E, Green A, Yellow D, Red G. The original Road Toad Music Pahoehoe strings were named for the black ropey lava they resemble. These polyurethane bass strings are made for Road Toad Music short scale bass instruments and Kala U-bass. The new Pahoehoe Dreads bring a little island color to your instrument. They are currently available on a limited basis in the regular tension set - 20" to 21" scale.