Need Help with H&R 10 mm DRS Spacers
 

Looking to install H&R DRS 10 mm wheel spacers, and am confused by a note on the back-side of the instructions that indicates for these specific spacers that "maximum hub height" cannot be greater than 10 mm. There is no point of reference provided so I'm not sure where the measurement is to be taken from … from the face of the brake rotor to the front edge of the hub??? … with the spacer on or off??? I'm completely confused. I checked the H&R website, but it was not especially helpful … and there is no link to contact them directly. I'm not only confused about where to take the measurement, but also why the note only applies to the 10 mm DRS spacers. I must be missing something (???). Help! Thanks.

Probably means they don't want you to put a spacer larger than 10mm with the included wheel bolts.

I think that I figured it out. The maximum hub height refers to the maximum distance that the stock hub can extend without the spacer bottoming out on the leading edge of the hub such that the spacer will not fit flush. I suspect that it's not an issue with the wider spacers since there's enough clearance because of the added width that the spacer will not bottom out. Not sure if the 10 mm spacers have ever proven to be problematic in terms of fit on the Z. I'll simply have to check the hub height when I pull the wheels off.