Boxster Spyder/Cayman R Wheels

[gwsinc]

My Cayman S has 19 inch Boxster Spyder wheels from factory, which are a little wider than standard Cayman S 19 inch wheels (8.5J and 10J rather than 8J and 9.5J).

This got me thinking about tyre pressures and I found this:



Which is different from the 32 PSI front, 34 PSI rear it has on both the owners manual, and more strangely the pressures sticker on the car.

So I've gone with 30 front, 31 rear in search of a less harsh ride - what are others with these wheels running in terms of PSI? And is the above info new to you?

Edited by gwsinc on Monday 24th September 22:02

[Porsche911R]

I run about 28/30

[arcamalpha]

Really interesting you’ve spotted this gwsinc. 991 shows much lower pressures than the B pillar too.

Can’t think why.

[gwsinc]

arcamalpha said:

Really interesting you’ve spotted this gwsinc. 991 shows much lower pressures than the B pillar too.

Can’t think why.

For the Spyder wheels it’s due to difference wheel size I guess, as mine were fitted from factory I’m surprised they didn’t have the ‘correct’ pressures on the b-pillar sticker.

Would be interesting to see what a Cayman R or Boxster Spyder sticker says.

This website gives you the sizes of all available wheels, might give you an idea of why each source is different? http://www.alloywheelsdirect.net/porsche_alloy_whe...

[Porsche911R]

gwsinc said:

Would be interesting to see what a Cayman R or Boxster Spyder sticker says.

they state 30/31 but I run them a bit lower as modern tyres have stiffer side walls and heat up faster I found, hence my setting above I posted.

[gwsinc]

Porsche911R said:

they state 30/31 but I run them a bit lower as modern tyres have stiffer side walls and heat up faster I found, hence my setting above I posted.

Thanks, went for a drive today at 30/31 and the difference was massive. PASM was much more bearable on my local B-Roads

[V800MJH]

My Cayman R stickers show 30/31.

[arcamalpha]

What are people running on 4x4 991s? B pillar in mine say 32/36 for comfort mode but imanuals.com says 29/31.