Help with OEM 20" wheels not clearing turbo s (?) callipers

[DanH]

Hi,

I've got a Ruf converted Cayenne which runs on 22" wheels but I've had 2 crack in 2 months so sending back to Ruf for inspection.

Meanwhile, I've bought some sport design 20" wheels second hand. The problem is they won't fit over my front callipers!!!

I believe the Ruf conversion uses the Turbo S brake callipers?

The Ruf wheels that clear ok are :

10J x 22H2 ET50

The Porshe Sport Designs which don't are :

9J x 20H2 ET60

Does this just mean I need 10mm spacers? There is plenty of clearance with the Ruf wheels.

Also how will I know if I need longer wheel bolts? Is the rule just that the length sticking out the back of the wheel through the spacer is longer than the width of the bolt?

Are they likely to fit regardless? Given they are still the standard Porsche items that came with the car.

Thanks for any assistance. You wouldn't believe the frustration when I mounted one up and realised the problem. I bought the sport designs 2nd hand only to find a nail in one tyre this am, then this!

Doubt its a consideration but the tyres on the 22" wheels were 295x30 instead of 275x40.

In fact I think my question can be boiled down to, what spacers are required to mount sport designs on a turbo S?

[Loren]

Hi,

I've got a Ruf converted Cayenne which runs on 22" wheels but I've had 2 crack in 2 months so sending back to Ruf for inspection.

Meanwhile, I've bought some sport design 20" wheels second hand. The problem is they won't fit over my front callipers!!!

I believe the Ruf conversion uses the Turbo S brake callipers?

The Ruf wheels that clear ok are :

10J x 22H2 ET50

The Porshe Sport Designs which don't are :

9J x 20H2 ET60

Does this just mean I need 10mm spacers? There is plenty of clearance with the Ruf wheels.

Also how will I know if I need longer wheel bolts? Is the rule just that the length sticking out the back of the wheel through the spacer is longer than the width of the bolt?

Are they likely to fit regardless? Given they are still the standard Porsche items that came with the car.

Thanks for any assistance. You wouldn't believe the frustration when I mounted one up and realised the problem. I bought the sport designs 2nd hand only to find a nail in one tyre this am, then this!

Doubt its a consideration but the tyres on the 22" wheels were 295x30 instead of 275x40.

In fact I think my question can be boiled down to, what spacers are required to mount sport designs on a turbo S?

Have a look at TSB 9/04 4440 Wheels For 19" Brake Rotors -- dated Aug 10, 2004

and

TSB 4/07 4440 Approved Tires, Wheels and Spacers (As of 2003 up to 2006) -- dated Nov 5, 2007

[DanH]

Arghhhhh I think you have it. I've unfortunately got the old type so I'm guessing it would be wiser to sell them than mess around with spacers. What a pain!

Thanks for your help.

Edited August 29, 2009 by DanH