Originally Posted by RMMGS4

On a stock wheel you can add a 25mm.

For an aftermarket wheel, knowing the width only, you can't tell if it will fit. We need to know the offset. With the correct offset, it's even possible for an 11 inch wheel to fit with a 25mm spacer.

Mark what is the offset of your wheel and are you willing to shave the lip to make the clearance if neccessary? I have connections that will install the spacers and shave the lip for you, and you already have a discount coupon from them already !

As far as stud length, even a 5mm spacer should have longer studs installed. It is not safe to run spacers thicker than 5mm without having longer studs. The H & R spacers do come with the studs when you order the correct PN from them. On a 20 to 25mm spacer, the longer studs are built into the spacer and the factory studs are just used to bolt the spacer to the hub only. So you don't need to replace the oem studs when you go this thick.