Frankenstein wheel setup idea *991 Turbo S with GT3 RS fronts and GT3 rears
07-09-2016, 04:00 PM
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Frankenstein wheel setup idea *991 Turbo S with GT3 RS fronts and GT3 rears
Bear with me on this *needing help from the wheel and offset experts here.
Before making the jump to a set of aftermarket wheels, I'd like to get a sense of centerlock wheels from the GT cars would fit onto my 991 Turbo S.
According to some of the research I've done so far, the rears of the GT3 will sit ~15mm (.6in) outward than the stock wheels on a Turbo S and sit ~3mm further away from the suspension strut. It seems like there's quite a bit of protrusion outwards but it looks like other aftermarket wheels run aggressive offsets similar to this in the rear and lowering the car will bring it pretty close to a flush stance. --> Assuming this isn't an issue with flinging debris up onto the rear body panels, thoughts on this interfering with clearance WRT the rear steering?
The fronts are where it gets a bit tricky *standard GT3 wheels will sit 4mm closer to the suspension strut *and* 4mm inboard the wheel well. No chance of a flush stance here because of no wheel spacers on centerlocks. Well, what about the GT3 RS front wheel, which will sit 5mm closer to the strut and extend 7mm outwards compared to the stock Turbo wheels? Again, what do people think of clearance issues here with the steering?
To summarize: would there be any clearance issues with fitting:
- a rear GT3 wheel that extends 15mm towards the outside of the wheel well compared to a stock TTS wheel while being 3mm further from the suspension strut.
- a front GT3 RS wheel that extends 7mm towards the outside of the wheel well but sits 5mm closer to the suspension strut
-----------
Here are the specific measurements I've dug up:
Turbo S Wheels
9 x 20 ET 51 245/35
11.5 x 20 ET 56 305/30
GT3 RS Wheels
9.5 x 20 ET 50 265/35
12.5 x 21 ET 48 325/30
GT3 Wheels
9 x 20 ET 55 245/35
12 x 20 ET 47 305/30
Before making the jump to a set of aftermarket wheels, I'd like to get a sense of centerlock wheels from the GT cars would fit onto my 991 Turbo S.
According to some of the research I've done so far, the rears of the GT3 will sit ~15mm (.6in) outward than the stock wheels on a Turbo S and sit ~3mm further away from the suspension strut. It seems like there's quite a bit of protrusion outwards but it looks like other aftermarket wheels run aggressive offsets similar to this in the rear and lowering the car will bring it pretty close to a flush stance. --> Assuming this isn't an issue with flinging debris up onto the rear body panels, thoughts on this interfering with clearance WRT the rear steering?
The fronts are where it gets a bit tricky *standard GT3 wheels will sit 4mm closer to the suspension strut *and* 4mm inboard the wheel well. No chance of a flush stance here because of no wheel spacers on centerlocks. Well, what about the GT3 RS front wheel, which will sit 5mm closer to the strut and extend 7mm outwards compared to the stock Turbo wheels? Again, what do people think of clearance issues here with the steering?
To summarize: would there be any clearance issues with fitting:
- a rear GT3 wheel that extends 15mm towards the outside of the wheel well compared to a stock TTS wheel while being 3mm further from the suspension strut.
- a front GT3 RS wheel that extends 7mm towards the outside of the wheel well but sits 5mm closer to the suspension strut
-----------
Here are the specific measurements I've dug up:
Turbo S Wheels
9 x 20 ET 51 245/35
11.5 x 20 ET 56 305/30
GT3 RS Wheels
9.5 x 20 ET 50 265/35
12.5 x 21 ET 48 325/30
GT3 Wheels
9 x 20 ET 55 245/35
12 x 20 ET 47 305/30
