Wheel shims/spacer

[pilchardthecat]

Thinking about trying to improve the look of the car on it's winter wheels, which are 19" lobster-claws. Last year i noticed that they are recessed a bit more than my "normal" wheels (which i think are the carrera sport). I know the tyres on the summer wheels are 305/19 vs 295/19 on the lobsters.

So - i was thinking maybe putting 10mm shims? has anyone else done this, where does one stand with respect to the warranty?

(It's a gen 2 997 C2S)

[V8KSN]

pilchardthecat said:

Thinking about trying to improve the look of the car on it's winter wheels, which are 19" lobster-claws. Last year i noticed that they are recessed a bit more than my "normal" wheels (which i think are the carrera sport). I know the tyres on the summer wheels are 305/19 vs 295/19 on the lobsters.

So - i was thinking maybe putting 10mm shims? has anyone else done this, where does one stand with respect to the warranty?

(It's a gen 2 997 C2S)

I dont think the warranty will be affected (I think Porsche offers spacers in the Tequipment catalogue) but from my (admittedly limited) understanding of physics, would spacers not put extra load and stress on related components?

[TheRealFingers99]

As long as the spacers are hubcentric and result in the stock ET, I can't see any issues. But it's not something I'd consider for purely cosmetic purposes.

[Zoin]

TheRealFingers99 said:

As long as the spacers are hubcentric and result in the stock ET, I can't see any issues.

So if stock wheels are ET65, I could fit ET55 with 10mm spacers? Is that how it works?

[FarQue]

Consider looking at what width and off-set your wheels are. It's all cast into the wheel so you should be able to work out what is different between your two styles of wheel. My own 997 is on 8/57x19 fronts and 11/67x19 rears which are standard sizes for a 'gen 1' Carrera S for instance.

[anonymous-user]

Porsche sell these and they are fine as long as you follow guidance on when to get longer bolts.

[hondansx]

Yep; as mentioned, Porsche sell them in the Tequipment brochure. Believe they are H&R so you may as well find a local tyre shop that sells them and save yourself some £££.

[TheRealFingers99]

Zoin said:

So if stock wheels are ET65, I could fit ET55 with 10mm spacers? Is that how it works?

It works the other way round. The higher the ET (if we're not talking negative ETs) the closer the rim sits to the centre line of the car. So, if the stock ET was 55, you'd fit 65ET with 10mm spacers.

[Zoin]

TheRealFingers99 said:

It works the other way round. The higher the ET (if we're not talking negative ETs) the closer the rim sits to the centre line of the car. So, if the stock ET was 55, you'd fit 65ET with 10mm spacers.

Ah, got it. There goes my option of cheap winter wheels
Thanks for the info RealFingers, much obliged.
And sorry for high-jacking your thread PilchardTheCat. Hopefully this info is useful to others as ignorant as myself.