Bicycle holder Wall mount

Hi Everyone!One of my friends ask me to create a Wall Mount for his Bicycles.He just want to use a wooden Rod and one Screw per Holder.I Print the Holder in ABS with 4 Walls and > 30% Infill.After that you need a Round rod in 40mm.I use oak for his holders.The Rod is glued in the Plastic holder and get additionaly secured with 3 Screws.To be sure what the holder is not moving around i Addad a 8mm Metal rod in the back of the wooden Rod, but that is up to you.The Metal rod is an additional security for the complete holder.