Sorry I misunderstood the OP question.There is no problem here, except misunderstanding.
The OP has a SP Air2 and hose for it. he want sot use the same hose on a standard inflator. He wants an adapter to g from the high-flow SP connector to the low-flow schaeder valve in a standard connector. They exist. They work fine. There is no flow rate problem.
Now, if he wanted to go the other direction -- connect a standard hose to an Air2, it would be a BIG problem. But that is not what he is doing.