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Winter wheels, will they fit?

Old 01-07-2019, 08:50 AM
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B1ackmarket
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Default Winter wheels, will they fit?

Hey guys, new to the 996TT scene. I was able to get a nice set of 19 inch winter setup off a carrera 4s 997.2. My question is, will I have any issues fitting them on my 996.

Thanks - B

Porsche 997 19-inch Winter wheels set, Carrera S II, rims 8J x 19 ET57 + 11J x 19 ET 51, Winter tyres 235/35 R19 + 295/30 R19
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Old 01-07-2019, 11:01 AM
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Carlo_Carrera
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Those tire diameters are not compatible with the AWD and PSM system. You need the tire diameters front to rear to be as close as possible.
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Old 01-07-2019, 12:45 PM
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Originally Posted by Carlo_Carrera View Post
Those tire diameters are not compatible with the AWD and PSM system. You need the tire diameters front to rear to be as close as possible.
thanks, is that just a 996 situation? The wheels came off an Awd 997.
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Old 01-07-2019, 02:24 PM
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Originally Posted by Carlo_Carrera View Post
Those tire diameters are not compatible with the AWD and PSM system. You need the tire diameters front to rear to be as close as possible.
These are within 2% -- I thought anything less than 4% was ok?
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Old 01-07-2019, 03:27 PM
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Carlo_Carrera
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Originally Posted by B1ackmarket View Post


thanks, is that just a 996 situation? The wheels came off an Awd 997.
The AWD/PSM drive system in the 996 is completely different than the system on the 997.2.

The 996TT system needs the diameters to be nearly the same. On my car I ran 245/35-19 and 285/30-19.
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Old 01-07-2019, 03:29 PM
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Originally Posted by jblaw View Post
These are within 2% -- I thought anything less than 4% was ok?
4% is way too different. I consider anything more than 1.5% to be detrimental to your viscous coupling and the PSM system will not like it either. The OEM tire size diameters are nearly identical front/rear for a reason.
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Old Yesterday, 05:52 PM
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do you guys think these will work for a 996tt? Coming off of a 2006 c4s
Front 18X8.5
Rear 18X10
Tires:
Michelin Pilot Alpin N2 (Porsche) Never repaired
Front - 235/40 R18 Tread 9/32 nds
Rear - 265/40 R18 Tread 6/32 nds
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Old Yesterday, 09:28 PM
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Absolutely no, those tire sizes are way out of spec for an AWD 996TT.

With a 996TT you want the front and rear tire diameters to be almost exactly the same. Those tires sizes front/rear are almost an inch different in diameter.


Need to know the offset of the wheels to judge them. They will probably fit fine.
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Old Today, 01:02 AM
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Winter tire sizes that work with 996TT AWD are:

225/40R18 265/35R18 (requires 10" rear wheel width)

215/45R18 275/35R18 (works with stock TT wheels) (my personal favorite combo)

235/45R18 275/35R18 (works with stock TT wheels)
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