Maxxis holy roller bmx tyre the holy roller is our most versatile bmx tire by further tightening the spacing and modifying the knob pattern of the maxxdaddy we improved both handling and speed hooks up in medium density soil and trails via a deep cut center groove for straight line control excels in both the front and rear features tire size 20x1 75 tpi 60 max psi 60 weight 425g approx durometer 70a nb 20 1 38 1 will only fit this size of rim20 1 38 20 1 14 24 1 38 1