Correct wheel offset for 986 cars

[blinkwatt]

I used to have 993 Turbo wheels on my Boxster. The rears were 18x10 w/ a 45mm offset,they fit perfectly with no problem. That is the biggest wheel size you can fit on a Boxster w/o spacers.

[Cloudsurfer]

That looks correct, the 10x18 ET45 rear, vs what the Bentley manual states with the 65mm ET.

If the 993 Turbos are good thats what I'll be looking for.

Patrick

[Cloudsurfer]

Just found a dandy chart on rennlist:

http://members.rennlist.com/911pcars/WheelWts.html

Apparently there were two versions of the 993 10x18 hollow spoke rears, one with a 40mm offset and one which is 65mm. Blinkwatt, do you know which version you used?

The fact that the Bentley manual suggests 65mm rear offset would mean you can use either the 65mm 993 turbo or the 996 turbo rears, which in that case would both be 18x10 at ET65.

So, for the 986 do we want 40 or 65 MM of rear offset?

Patrick

[ray986s]

Per the Tequipment Boxster catalog it lists the 18x10 rears at et47 for both the Turbo look II and the SportTecho. The fronts are at 18x8 with et 50.

[Cloudsurfer]

I spoke to the guys at HRE and they said for 986 Boxsters on a 18x10 wheel they like to see 40-50mm of offset, however I keep seeing the ET47 coming up more frequently, which leads me to believe that 47 is ideal, while 40-50 is acceptable. Either way, it seems 65 is out.

Patrick

[Dohertycm]

I have the sport classic 2 wheels on mine, and the chart says they are 65mm offset on the 10x18 wheel and 52mm on the 8x18 fronts.

But now to throw some coals in the fire, what is the largest tire size I can use in the front and the rear....really.

My 74 911 says 185 but I have a 205 on it. So for a boxster what is the widest tire i can put on my rim on the rear?

[mn box s]

You should beable to go 275. I went 265 to be safe as I'm doing coilovers and didn't want to modify wheel wells once slammed. My rear et 56 w/ 10mm spacer. Fronts et 47 w/ 235x35x19 Rear tire size265x30x19 Hope this helps.