Now that you had many hours of experience riding a bike , you can easily ride your bicycle.
I sense that in this sentence the participle clause in bold adds a meaning to the sentence that "you" spent many hours experiencing a bike.
My question is that why there is not "in" before "riding bike"?
Would there be a difference in the meaning if we put "in" before it?
Secondly in my understanding of present participle clause, these clauses have got the same subject as the main sentence and depending on the context they modify the main sentence in terms of how or when. But in the sentence above, "riding bike" is a part of the main sentence let alone assuming complementary role or constituting a clause.
How could it be possible that "riding a bike" can be a part of the main sentence, supposing that it is a participle clause?
If it is not a participle clause so what it is?
Why there is no "in" before it?