I found a Volvo roof top factory bike rack part number 6820699-4.does anybody know if it will fit a 2005xc90or not

 

I believe its universal to all Volvo models, unless you have a roof rack installed.

 

Are you tall enough to get up there!? It's up to you, but I used to own a bike shop. Roof racks are great for hauling tons of stuff on long summer vacays, but for a bike rider who's going to use one all the time, I'd suggest getting a tow hitch one for the back. The added wind noise would drive me a little nutty, but I'm weird like that.