tommo951

Just found this warning bullitin regarding 17s and 18's what is the current thinking? Here is the link http://www.asarus.com/jantes17.shtml

Was thinking af putting some 18 x 9 & 18 x 10 on mine, anybody had any problems?

Cheers
Tom

daniel951

i have been running 18x9 rims for over a year now and no problems so far.

horsepowerfarm

Tom,
I run 8 & 10 x 18, With no spacers 968 caster blocks and Rennbay geometry correction ball joint kit, PZero Corsas, full coil overs w/ 550# and 700# springs, no torsion bars. No problems, and it is streetable.

Zackb911

I LOVE THAT CAR:-)

JDeitz951

Winslow-

I want your front license plate holder. Where did you get it?

hosrom_951

There is a S2 Cab here in Dubai running on 18's, no problems with it.

Luis de Prat

Proper formula for larger than 16" wheels on these cars, or you will tear up the 951 caster block bushings. Ask me how I know.

TonyG

Been running 17" rims for years on/off the track with no problems.

Running 18" with updated caster blocks with no problems thus far (getting ready to track the hell out of it .. mu ha ha..)

TonyG

SimonK

Don't know about 18 inch but 17's no probs at all.

brad-cam

What does the wheel size have to do with the castor blocks ? If the overall diameter of the tire/wheel combination is the same with 17s as the 16s and the car is not lowered, I'm having trouble seeing why the castor blocks themselves would "know the difference". The Porsche bulletin mentions that the castor spec has changed, and that the eccentrics need to be replaced too. That makes some sense, though I don't hear too much on this board about changing the eccentrics.

I'm about to do this upgrade and wanted to understand it a little better. Anyone know more about this subject ?

horsepowerfarm

Deitz,

Sorry I missed you guys on the sixspeed cuise last weekend. My shoulder is healing nicely.

Factory lic. bracket rubber blocks and screws. Plate frame and cover was from Autozone or some other cheese wiz parts store.

Thanks for the compliment, Zackb911!

Luis de Prat

Greater unsprung weight is what makes the difference. Larger wheels and larger tires equal more weight.

black944 turbo

I thought that running 17s wasn't a problem? Just curious why all of the comotion. I know that there is a bulletin. But people on this sight have been running 17s for years. Just curious.

Luis de Prat

It's not a problem per se, you just need to upgrade to 968 caster blocks and eccentric bolts if you plan on doing any serious turning at speed.

Great info about them on Tom Pultz's 944S2.com site. Here's what one looks like installed:

brad-cam

To get the full effect, do the eccentric bolts need to be replaced too ? They add another $120 to the upgrade.