TECNIUM offers this tube size 4.25/4.50-19 which corresponds to 120/80-19. This tube will fit on many motocross and enduro wheels. It is a standard tube of excellent quality. The tube is 4mm thick. It is therefore thicker than many other brands. The advantage of having a thicker tube is that you can avoid punctures faster. We strongly recommend this thickness at least to avoid changing the inner tube every ride.