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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 12:00 pm    Post subject: Wheel offset help needed Reply with quote

Hi folks, do you know if an 11" rear rim with an et51 offset will fit the rear of a 996 C2.2 (narrow body)

Someone is selling a set of standard 996 wheels but they are 8" and 11"?? I'm just not sure what is what and have read loads. I'm slightly confused if I'm honest. I'm currently non 19" wheels and wanted a standard looking set. Many thanks for any help.
 
  
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HSC911
Dijon


Joined: 23 Jul 2014
Posts: 7050
Location: Bedford


PostPosted: Tue Jan 14, 2020 12:06 pm    Post subject: Reply with quote

This website is Mint for this kind of info:

https://www.willtheyfit.com/

Thumb
 
  
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911Time
Spa-Francorchamps


Joined: 25 Sep 2018
Posts: 253
Location: Staffordshire


PostPosted: Tue Jan 14, 2020 12:32 pm    Post subject: Reply with quote


_________________
Mark


I'm not a perfectionist - I just want everything done 'Right' Wink

Current: GT Silver 991.1 C4S with a few 'special bits'. Previous Owned: C63 Estate, BMW e92 330d Coupe (700Nm/Custom Exh/Map/BBK/Quaife/Breytons), ML63AMG, Alpina e46 B3S Coupe, Alpina e36 B3 Coupe, Lotus Excel SE, Alfasud Green Cloverleaf Ti, Lancia HPE, Capri 2.0S, Marina 1.8 (don't laugh it was my first road car). Bikes: Suzuki TL1000R and BMW R1100S AC Schnitzer.
 
  
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911Time
Spa-Francorchamps


Joined: 25 Sep 2018
Posts: 253
Location: Staffordshire


PostPosted: Tue Jan 14, 2020 12:33 pm    Post subject: Reply with quote

As HSC911 said - willtheyfit.com is very good Thumb

I also use Wheel Size.com to establish what the factory fitment and offset is for a vehicle, before considering what changes might be possible.

https://www.wheel-size.com/size/porsche/911/

Just select the model, year, engine size, find your current wheel diameter and then click on the '+' symbol to see the factory front/rear wheel size and offset.

Wheel Size also have a 'Tire Calculator' at the top of the webpage - similar to willtheyfit but a bit more comprehensive with more info and alternative options - saves ages working it all out.
_________________
Mark


I'm not a perfectionist - I just want everything done 'Right' Wink

Current: GT Silver 991.1 C4S with a few 'special bits'. Previous Owned: C63 Estate, BMW e92 330d Coupe (700Nm/Custom Exh/Map/BBK/Quaife/Breytons), ML63AMG, Alpina e46 B3S Coupe, Alpina e36 B3 Coupe, Lotus Excel SE, Alfasud Green Cloverleaf Ti, Lancia HPE, Capri 2.0S, Marina 1.8 (don't laugh it was my first road car). Bikes: Suzuki TL1000R and BMW R1100S AC Schnitzer.
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
Posts: 2472



PostPosted: Tue Jan 14, 2020 12:37 pm    Post subject: Reply with quote

I hope so, my new wheels are ET 50 and 11" at the rear, going on a narrow body 996.1.
_________________
My 996, AKA Project Ridiculous
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 12:50 pm    Post subject: Reply with quote

Dammit wrote:
I hope so, my new wheels are ET 50 and 11" at the rear, going on a narrow body 996.1.


Ah, what size tyres are you going for? I'd be interested to hear how they fit!!
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 12:51 pm    Post subject: Reply with quote

911Time wrote:
As HSC911 said - willtheyfit.com is very good Thumb

I also use Wheel Size.com to establish what the factory fitment and offset is for a vehicle, before considering what changes might be possible.

https://www.wheel-size.com/size/porsche/911/

Just select the model, year, engine size, find your current wheel diameter and then click on the '+' symbol to see the factory front/rear wheel size and offset.

Wheel Size also have a 'Tire Calculator' at the top of the webpage - similar to willtheyfit but a bit more comprehensive with more info and alternative options - saves ages working it all out.


Ok cheers for that I'll look.
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 12:52 pm    Post subject: Reply with quote

HSC911 wrote:
This website is Mint for this kind of info:

https://www.willtheyfit.com/

Thumb


Thanks mate I'll look.
 
  
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HSC911
Dijon


Joined: 23 Jul 2014
Posts: 7050
Location: Bedford


PostPosted: Tue Jan 14, 2020 12:56 pm    Post subject: Reply with quote

Parsley wrote:
HSC911 wrote:
This website is Mint for this kind of info:

https://www.willtheyfit.com/

Thumb


Thanks mate I'll look.


No big Dill Thumb
 
  
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cableguy
Watkins Glen


Joined: 10 Sep 2007
Posts: 2099
Location: North Yorkshire


PostPosted: Tue Jan 14, 2020 1:01 pm    Post subject: Reply with quote

For reference a NB 996.2 GT3 runs 11.0j x 18" rears with an offset of ET63.
The wheels you are looking at with an ET51 will be 12mm closer to the outside arch. I'd wager that 12mm may be a tad too much with the correct size tyres and you may need to tickle (roll) the arches to avoid rubbing. Thumb

C.
_________________
Pork!

Last edited by cableguy on Tue Jan 14, 2020 1:02 pm; edited 1 time in total
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 1:01 pm    Post subject: Reply with quote

I had a look on willtheyfit but will need to find out the offset of the rear wheels that are on it at the moment. The problem is there are 265/30/19 on the rear but on what I suspect are 11" rims. The rear tyres are so pulled in it looks stupid and gives a very hard ride. I'm wanting to either put a 285 section rear on so it does not look silly (hope they don't catch) or go back to 18" wheels.
 
  
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911Time
Spa-Francorchamps


Joined: 25 Sep 2018
Posts: 253
Location: Staffordshire


PostPosted: Tue Jan 14, 2020 1:08 pm    Post subject: Reply with quote

Parsley wrote:
I had a look on willtheyfit but will need to find out the offset of the rear wheels that are on it at the moment. The problem is there are 265/30/19 on the rear but on what I suspect are 11" rims. The rear tyres are so pulled in it looks stupid and gives a very hard ride. I'm wanting to either put a 285 section rear on so it does not look silly (hope they don't catch) or go back to 18" wheels.


Hi Parsley, for your current setup take a look at the link I gave earlier and then you can either use the WheelSize or WillTheyFit calculator.

HTH Smile
_________________
Mark


I'm not a perfectionist - I just want everything done 'Right' Wink

Current: GT Silver 991.1 C4S with a few 'special bits'. Previous Owned: C63 Estate, BMW e92 330d Coupe (700Nm/Custom Exh/Map/BBK/Quaife/Breytons), ML63AMG, Alpina e46 B3S Coupe, Alpina e36 B3 Coupe, Lotus Excel SE, Alfasud Green Cloverleaf Ti, Lancia HPE, Capri 2.0S, Marina 1.8 (don't laugh it was my first road car). Bikes: Suzuki TL1000R and BMW R1100S AC Schnitzer.
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 1:34 pm    Post subject: Reply with quote

911Time wrote:
Parsley wrote:
I had a look on willtheyfit but will need to find out the offset of the rear wheels that are on it at the moment. The problem is there are 265/30/19 on the rear but on what I suspect are 11" rims. The rear tyres are so pulled in it looks stupid and gives a very hard ride. I'm wanting to either put a 285 section rear on so it does not look silly (hope they don't catch) or go back to 18" wheels.


Hi Parsley, for your current setup take a look at the link I gave earlier and then you can either use the WheelSize or WillTheyFit calculator.

HTH Smile


Ok cheers will do
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Tue Jan 14, 2020 2:00 pm    Post subject: Reply with quote

cableguy wrote:
For reference a NB 996.2 GT3 runs 11.0j x 18" rears with an offset of ET63.
The wheels you are looking at with an ET51 will be 12mm closer to the outside arch. I'd wager that 12mm may be a tad too much with the correct size tyres and you may need to tickle (roll) the arches to avoid rubbing. Thumb

C.


Thanks a million mate, great help.
 
  
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Stotty
Monza


Joined: 17 Dec 2009
Posts: 172
Location: Surrey


PostPosted: Tue Jan 14, 2020 4:56 pm    Post subject: Reply with quote

Sites like 'will they fit' will only tel you the difference in offset, not if they will actually fit your car.

Standard off sets are pretty conservative, which is why you can easily run a 15mm spacer on a 10" et65.... effectively making it et50.

But an 11" et50 (the equivalent of a 10" et 37) is going to be very tight unless you roll the rear arches - 996.2's arches are rolled, but 996.1's have a c.10mm lip inside the arch. Alternatively, you may be able to run more camber, or run a narrower tyre to stop them rubbing (something like a 275.
_________________
2000 996, C2, manual, arctic/metropole, Koni shocks, H&R -30 springs, H&R ARB's, Rennline SS engine mounts, cup wheel, 170k miles. 2018 Touareg RLine Plus
 
  
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Parsley
Trainee


Joined: 12 Jan 2020
Posts: 58
Location: Hebrides


PostPosted: Sun Jan 19, 2020 7:24 pm    Post subject: Reply with quote

Stotty wrote:
Sites like 'will they fit' will only tel you the difference in offset, not if they will actually fit your car.

Standard off sets are pretty conservative, which is why you can easily run a 15mm spacer on a 10" et65.... effectively making it et50.

But an 11" et50 (the equivalent of a 10" et 37) is going to be very tight unless you roll the rear arches - 996.2's arches are rolled, but 996.1's have a c.10mm lip inside the arch. Alternatively, you may be able to run more camber, or run a narrower tyre to stop them rubbing (something like a 275.


Thanks very much for your input. I've gone for 997 5 spokes with a 10" rear. I think et was 53 off the top of my head so should fit fine
 
  
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