ProzakUser

I have the Split 5 Spoke wheels from the ISx50. I've done plenty of research into this topic....and just wanted to get a second opinion on this before I pull the plug and buy a set of spacers. I'm currently running 245/40/18 Kumho Ecsta ASX all around. I know the wheels are staggered, but the tire fitment did not seem to be an issue. My question is this: What would you recommend as far as spacer size for a flush look in the rear? Many seem to point towards 25mm, but I was thinking it may be too much and would rub the fender at some point. I'm on stock springs, and plan to install some RCA's and MAYBE coil overs in the future. Should I go with 20mm, or 25mm? I want them on the rear only as to minimize the chance of vibration. Of course, the spacers I will buy will be hubcentric.

And while I'm thinking about it....are there any pros/cons of installing a spacer that utilizes longer lug studs? Or should the bolt on's be just fine? I think with the longer studs it would minimize vibration chances even further...but I could be wrong!

2000 GS300.