Front wheel riser

This is a 4-ball riser block for your frontwheel made to ensure your bike still sits level after adding tennis ball feet to your smart trainer while also adding more comfort. 

Due to the 4 ball design and the centering of the curvature, this block stays put below your wheel without sliding out from under it. 

I originally designed it for my 32mm Continental GP5000's but have also uploaded alternative versions for 28 and 25mm tires based off the respective measurements for the Contintental GP's different sizes. 

The cutouts for the tennisballs are snug so that the balls fit in nicely without falling out if you move your bike around.

Printing it long end up should fit most printers (24mm total height) and allow it to be printed without supports. 
I printed mine at 0,3mm layer height, 3 walls and 20% infill in PETG and it has so far been plenty sturdy without any noticeable flex in the material.