Most experts suggest waiting until your baby reaches nine to twelve months....

https://wiki-room.win/index.php/How_Do_I_Keep_My_Child_Entertained_on_Longer_Bike_Rides%3F

Most experts suggest waiting until your baby reaches nine to twelve months. Before you head out, confirm your little one holds their head up steady while wearing a helmet. They also need enough core strength to sit up unsupported