Hi guys.
I need a wee bit of assistance.
When I started my brake conversion I noticed for the first time that disk bolts were actually nut and bolt.
These things go from one disk face to the other.
Is this normal for SP magnesium wheeled bikes.
Or has this happened later in its life.
I have attached a couple of pictures of the pretty much finished bike.

Any help in clearing this up would be greatly appreciated.
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It smokes a lot is that right !