This model was requested by a friend of mine and is inspired by a beautifully designed but very pricey bike wall mount. However, I built an individual version myself from scratch and am happy with the result. So let's share it. 

It's designed for rim heigths up to 10 cm and tyre widths up to 5 cm.

The wooden stick has a diameter of 25 mm and is 20 cm long in my example. I got a 1 m long one in the construction market and used a Japansess saw to cleanly saw it.

As you see on the pictures, you can nail something like a piece of felt below the mount onto the wall to prevent it from getting dirty from the rear wheel. 

I printed it in standard PLA and it's strong enough. Gyroid infill pattern recommended.

Also have a look at my other bike (gear) wall mounts if you're interested.