I tried to fix it to the steel rack's foot with a 6 mm root angle bolt,
In the wheel diameter 40 mm type, the interval between the two holes through which the bolts pass is narrow,
As it is, the edges of the heads of the two bolts will touch and interfere.
If you cut the edge of the bolt head about 2 mm each, or if you do not cut long holes about 4 mm
The root angle bolt can not be used.
If the wheel diameter is 50 mm type, it can be used as it is because the hole spacing is wide.