Snow tires on 20 inch wheels
09-03-2019 | 05:46 PM
#16
RL Community Team
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295 on 12" is not recommended. 295 maxes out at 11.5" wheel.
Buy a Porsche pre built winter wheel set and save your self the likely damage that will happen from 2x year mountings and wheel weight removals.
Buy a Porsche pre built winter wheel set and save your self the likely damage that will happen from 2x year mountings and wheel weight removals.
Last edited by Jack F; 09-03-2019 at 07:32 PM.
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rockrdude (09-04-2019)
09-03-2019 | 06:56 PM
#18
Pro
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Thats great news - thank you everyone for your help. Now I need to decide if I will buy another set of wheels or have the snows mounted on my painted Carerra wheels. Other than putting my wheels through the punishment of an Ohio winter, is there any reason not to just swap the tires back/forth on the same wheels ? Presuming I have my P dealer do the swaps, is there any wear/tear on the wheels/tires (ex: tire bead) I should worry about ?
09-03-2019 | 11:49 PM
#19
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From: Ohio
Am I safe to presume that if I make an investment in the 20” wheels that I could put them on any 991.1 , 991.2 or 992 I might have in future, including a narrow-body ?
09-04-2019 | 12:19 AM
#20
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From: Connecticut
09-04-2019 | 09:22 AM
#23
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I don't see how you could (fully) do that with a 992, they use staggered wheel sizing, either 20/21, or 19/20 on the base.
09-04-2019 | 12:43 PM
#24
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Here's what they want to to use (i.e. sell to you):
Summer wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 ZR 20 (91Y) tires
Rear axle: 11.5 J x 20 RO 56 with 305/30 ZR 20 (103Y) XL tires.
Winter wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 R 20 91V M+S tires
Rear axle: 11 J x 20 RO 56 with 295/30 R 20 97V M+S tires.
09-04-2019 | 01:15 PM
#25
Rocky Mountain High
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I believe that the Turbo and GT3 cars are “mega wide” bodies, slightly wider than the C4, C4S, and GTS. I’m not sure if that impacts wheel offset or not.
09-04-2019 | 01:47 PM
#26
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From: Ohio
The 295 rear tires fit on the 11.5" rear wheels (because other threads have photos that show it isn't too stretched) but my dealer refused to do it. Porsche wants you to put the 295s on 11" wheels.
Here's what they want to to use (i.e. sell to you):
Summer wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 ZR 20 (91Y) tires
Rear axle: 11.5 J x 20 RO 56 with 305/30 ZR 20 (103Y) XL tires.
Winter wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 R 20 91V M+S tires
Rear axle: 11 J x 20 RO 56 with 295/30 R 20 97V M+S tires.
Here's what they want to to use (i.e. sell to you):
Summer wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 ZR 20 (91Y) tires
Rear axle: 11.5 J x 20 RO 56 with 305/30 ZR 20 (103Y) XL tires.
Winter wheels/tires:
Front axle: 8.5 J x 20 RO 49 with 245/35 R 20 91V M+S tires
Rear axle: 11 J x 20 RO 56 with 295/30 R 20 97V M+S tires.
How do I determine what width my wheels are ? Can I measure this without dismounting the tire ? I have painted Carerra Sport Wheels (build sheet code was XRD)
09-04-2019 | 02:25 PM
#27
Three Wheelin'
Joined: Dec 2016
Posts: 1,859
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From: Toronto
Thats great news - thank you everyone for your help. Now I need to decide if I will buy another set of wheels or have the snows mounted on my painted Carerra wheels. Other than putting my wheels through the punishment of an Ohio winter, is there any reason not to just swap the tires back/forth on the same wheels ? Presuming I have my P dealer do the swaps, is there any wear/tear on the wheels/tires (ex: tire bead) I should worry about ?
09-04-2019 | 04:09 PM
#28
Burning Brakes
Joined: May 2005
Posts: 945
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From: Boston, MA
not a safe assumption. lots of variability and Widebody to Narrow is an issue. Even between WB 991.Xs there are spacers needed and some may be incompatible so going to 992 Im sure has lots of risk including different size wheels front and rear on some(all?) models.
09-04-2019 | 04:16 PM
#29
Three Wheelin'
Joined: Dec 2016
Posts: 1,859
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From: Toronto
Porsche recommends 295 on their 20" wheel. Thats what dealers sell.....its in the manual too.