How much am I looking at to get them fitted at a bike shop?
Can you still bring your own kit or will they look at you funny / overcharge you labour

?
Also what is the correct size I need?
45 rear but what is the front one ?
I might go 46 maaaaaaaaaaaybe 47 but I'm worried about the fuel consumption as I use the bike for commuting.
Oh and final question: If I have this done at a bike shop - will they check the wheel alignment aswell?
Thank you very much for your help in advance.