Thinking about spacers for summer wheels - 986 Forum - The Community for Porsche Boxster & Cayman Owners

timothy · 04-30-2009, 04:40 PM

I do that exact thing. For daily driving I have 18x10 rears with 10mm H&R spacers and longer wheel bolts. Come track day I remove the spacer and mount 17s using the original bolts. Taking off the spacer adds at most an extra 20 seconds to each wheel. Easy stuff.

jmatta · 04-30-2009, 04:54 PM

I think before you even begin considering spacers, you need to determine the offset of the 18 wheels you'll be mounting. With the offsets known, there are many here that can help you determine if spacers are necessary or desirable.

Perfectlap · 04-30-2009, 05:14 PM

50 mm front & 46 mm rear

Cloudsurfer · 04-30-2009, 05:38 PM

If you're running a 18x10 ET46 that is PERFECT. You do not want to space that any farther out. For a short time, I had 18x10 ET40 rears (which is what you would get with a 5mm spacer) and a 265 rear tire- there was barely any clearance to the fender. With an 18x10 ET50 (my BBS RSIIs are 18x10 ET50 and I run a 5mm factory spacer) there was barely enough clearance on the inside to slide a few sheets of paper through. So, 18x10 ET45 is about ideal, so if the wheels you're looking at are ET46 I would call it good.

I'm assuming you're looking at an 18x8 or 18x8.5 front, and ET50 is just about perfect there too.

Perfectlap · 04-30-2009, 05:45 PM

yup 18x8....

so the stock bolts should work?

Cloudsurfer · 04-30-2009, 05:57 PM

Assuming your wheels don't utilize a different shaped lug bolt, stock lugs should be fine.

jmatta · 05-01-2009, 05:46 AM

I agree with bmwm750; no spacers required and stock bolts.

Congratulations...