Instruction manual:
https://www.libble.de/thule-velo...
Instructions on page 3, the minimum neck diameter is 28.5 mm.
On page 6 the ball radius is > 45mm and the distance to the bumper > 65 mm.
On page 7 the closing pressure.47 kg.

Yes it fits, have the same one on my Touran....Top thing

The carrier (Thule VeloCompact 3) fits on every common trailer coupling. Excellent quality product!