Coleman has named Tottenham star Bale, who is contemplating a potential world record move to Spanish giants Real Madrid, in his 23-man squad.
Bale is currently nursing an injury, but his absence from Spurs' pre-season programme has done nothing to quash speculation surrounding Real's reported intent to better the world record £80million they paid for Cristiano Ronaldo four years ago.
"I always try to pick our strongest squad," Coleman said. "In the FIFA rankings, we have got to try and be as high as we can. We need to win games and keep climbing.
"Gareth knows how important he is to us. It is vitally important we finish as high as we can in our (World Cup) qualifying group, and we need to keep the momentum going.
"If he is not right, he's not right, there is nothing we can do about that.
"But since I have been in charge, he has always been with the group and he has always been very enthusiastic. He loves playing for Wales. We need Gareth, and he knows that."
Coleman agrees that the less physical nature of Spain's Primera Division, compared with the Barclays Premier League, could have a positive spin-off effect for Wales if that is where Bale ends up.
"The tempo of football in Spain is a lot less than the Premier League. The Premier League is the fastest, most physical league on the planet, bar none," he added.
"In La Liga, and I have sampled it, the tempo is slower. It is less physical, so that could be a plus. I am sure that is not in Gareth's thinking.
"If he ends up playing in Spain, or wherever, physically, for Wales, it could be a plus.
"I don't get involved with what is going on with Gareth's transfer. Whatever is going to happen is up to Tottenham and Gareth. We have picked the squad, and he is in it.
"Unless we are told that he is unavailable, we will just do what we've always done, and that is expect him to be there.
"When you play football like Gareth does - he is very dynamic, very powerful and unbelievably quick - you are going to pick up niggles.
"It is nothing that we are worried about. If it was serious, then we would have known before now."
The Ireland game offers Coleman a chance to assess his players before they resume their World Cup qualifying campaign away against Macedonia early next month.
There are places for the likes of Swansea defenders Ashley Williams, Neil Taylor and Ben Davies, while Cardiff's 34-year-old striker Craig Bellamy is also included alongside fit-again Wolves goalkeeper Wayne Hennessey.
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