None. Bears and wolves are no safety concern in Norway and Finland.
Both are shy and, since they are not used to human contact (opposite to say, some places in the US where bears are used to people) will try to avoid all human interaction. This will mean that they'll go out of their way to avoid you and very likely you won't see any.
If you ever do catch a ...
That's a bit short for an SE answer but it pretty much covers the problem, there are various manufacturer specific sizes and no standard. Some parts providers such as Thule sell accessories and adapters to allow a greater range of compatibility.