Does anyone run rear wheel spacers, to help fill in the fenders better? I remember reading something about them on this site. Where do you get them ? How much? What kind of stress do they put on the rear axle?

 

Rod Millen sells a couple of different sizes. Personally, I don't thinks spacers are a good idea. Better to fill the wheel well with a wider rim and tire.

 

Definitely go with a wider rim in the rear. On my GS 300 i'm running 18x8 in the front and 18x9.5 in the rear and it fills in beautifully. Spacers bad!!! Depending on where you get them from, they could break.