When I bought a new car, I bought it at a dealer and had it installed.
The car I was riding before I bought the Roadster was quite rigid, and when I tried the Roadster, I felt that it was a little less rigid.
I was thinking about purchasing a dealer option tower bar, but when I looked at the Auto Exe site, I found a "tower brace set" that was a further evolution of the tower bar, so I ordered it without hesitation.

It was recommended to set it with the member brace set, but first of all, only the tower brace set is installed.
As expected, it is reinforced from the front and back with a steel oval shaft, so you can feel that the suspension is doing its job well without any anxiety that you felt during the test drive.
The disadvantages are that the maintainability will be reduced and that the rear side is hanging on the trunk room tray, so it will interfere when taking out the contents, but that is the case when driving. You can get a sense of stability so that you don't have to worry about it.

● Chiba Prefecture Sleeping Sand (Roadster / NDRF)