Grooved front roller 55
The grooved, indented roller puts more pressure on the straws, which lifts those straws that would otherwise go undisturbed by the flat cylinder.
The indentation on the roller also helps you to maintain the direction when mowing. This is very useful if you want to achieve perfectly straight stripes.
Because of the indentation on the roller, it is necessary to be more careful when turning the mower. An insufficient lift of the front roller can cause the mower to get stuck.