No wooden crosspieces here.
The Robert Axle Project has created a 12×142 mm Yoke Mounted thru Axle for your thru Axle Bike so you can mount your favorite Extrawheel Bike Trailer to your bike.
Install the Robert Yoke Axle designed for your bike into your frame and attach the 10x1mm attachment from your trailer manufacturer to the Robert Axle.
Robert Axle makes the solid axle with machined 7075 aluminum and finishes it off with a hard anodized for rugged durability.
To determine the size of your thru axle, print the Axle Fitment Guide. (See video for Guide instructions)