Hi guys,
I am new here and hoping to get some help.

I am getting a set of 19" wheel as my snow tire set for my 2013 991 C2. The detail is front 19 x 8.5 ET 57 rear 19 x 11 ET 67. It looks like this is a set designed for a 997.

The offset for 991 I think is front ET 54 and rear ET 69. I was wondering if the set will fit 991 and what could go wrong?

Really appreciate your help

Thanks

 

Not sure about the 19's but for the 20's the offset is:
Front: 8.5J ET 51
Rear: 11J ET 70

The above is for stock 991 wheels.

Oops sorry forgot to welcome you!

 

Thanks. Yeah, I am using this exact same 20" inch as my summer tire set.

I am getting another set for the snow tire that is where I run into some troubles

 

Afaik, for the 991 19's they are
8.5x19 ET 54 front
11x19 ET 69 rear

 

3mm is only 1/8".
The front 57mm should clear the strut with a 235 tire.
Might be tight with a 245.

I'd recommend running a factory 5mm spacer (and wheel bolts) on the front to bring you to F 52mm.
Which should be better than 57mm.

 

I just went through all of this! Use this calculator to see what the rim/tire will look like on your car. It will provide an approximation! http://www.willtheyfit.com/

 

Thanks guys.

Lunarx: the 5mm spacers will bring the wheels 5mm out to ET 52. I think it will look nicer but will peformance be better? Could you elaborate. Really appreciae your help

 

I think you are better off with 52mm than 57mm.
Naturally the wider track will give you improved front grip.

On the other hand;
57mm can keep your tire deeper in the fender, which can be good for containing road splash in winter driving.
Also, a shorter front track may negate some overseer on slippery roads.

So there are some pros & cons to each option.

I'd pick up the spacers to have on hand.
If the wheels clear w/o spacers and the car drives well, maybe you don't need them.
However, if the tire seems too close to the strut for comfort (maintain at least a small finger width) or the steering feels lazy you can put the spacers on and be set.

 

Great advise.
Thank you!!

 

If you want 19s to sit flush then the offsets need to be in the mid to low 50s.

Have a 5, 7, 10mm spacer to see which fits best. A good tire shop should have those. Tires23 is a good place in the GTA.