I have a 2008 Sport XL and I want to get my wheels to meet my flares, what size spacers will I need to use in the front and rear??

 

Welcome to the forum

Get a string, tie a bolt or nut to its end, any thing heavy, its called a DIY plumb line
Get a tape measure

Hold string at edge of flare, weight drops it straight down
Measure from the part of the tire you want to match the flare, to the string

You got the spacer size