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305 rear tires instead of 295. Any issues?

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Old 03-26-2018, 06:43 AM
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M3to911s
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Default 305 rear tires instead of 295. Any issues?
Hello guys, I’m about to get a new set of tires for my 991.1 and thinking to get 245 fronts (same as original) and 305 rears (my original on turbo wheels are 295). Anyone done that and had any regrets? Also thinking of getting Michelin PSS not perilli, your feedback will be appreciated. Thanks
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Old 03-26-2018, 07:38 AM
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Carrera2RS
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What size rims are you running ?
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Old 03-26-2018, 07:46 AM
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M3to911s
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245/35/20 and 295/30/20
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Old 03-26-2018, 08:01 AM
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Originally Posted by M3to911s
245/35/20 and 295/30/20
That is the tire size and not the wheel size.

Changing the rears like that with ever so slightly change the handling characteristics. You likely won't notice.

Going to Michelins: Big difference in Grip, comfort and sound.
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Old 03-26-2018, 09:21 AM
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I am running 305 on my 2013 Cab S but that goes along with 8.5 x 20 rims in the front and 11 x 20 rims in the back.... have no idea what you have but you should find out and then decide.... btw - the sales brochure for my car showed the same width rims (11) on both the S and 4S but the S came with 295 and the 4S with 305's .. so it looks like if your rims are at least 11 you should be ok.... unless they have changed the recommendations for some reason ... at any rate I haven't had a problem.
Last edited by mikeearly; 03-26-2018 at 09:30 AM. Reason: additional info
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Old 03-26-2018, 09:58 AM
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Jabs1542
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I have a 991.1 S with the 20x11 wheels and run 305s without any problems. I track my car a lot and picked a little bit more push with the wider rear tires (as expected) that was easily dialed out with camber adjustments. The reason I went to 305s is because they are much more available than the 295s, I'll go through 6 to 7 sets of tires in a season.
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Old 03-26-2018, 10:09 AM
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2001f4s
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305's on a 991.1 and 991.2, no issues.
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Old 03-26-2018, 11:57 AM
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See answers to the thread that I started. I am planning to add 5mm OEM spacers to counter the slight change in offset

https://rennlist.com/forums/991/1057...gn-wheels.html
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Old 03-26-2018, 05:44 PM
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11" can take 295 or 305
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Old 03-26-2018, 07:59 PM
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I have a base 2014 which came with sport technos and 305's from the factory
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Old 03-26-2018, 08:14 PM
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JEllis
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I am running 265 front and 325 rear on 19" wheels. Love the increased grip.
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Old 03-26-2018, 08:18 PM
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Originally Posted by JEllis
I am running 265 front and 325 rear on 19" wheels. Love the increased grip.
When I looked at my 245 and 295 together uninstalled, I kind of thought I should have gone for wider fronts. The difference was astonishing. Kind of regret not going 305 too though, ha!
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Old 03-26-2018, 09:35 PM
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erko1905
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255/35 & 305/30 also works on 20s, in Michelin PS4S
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Old 03-26-2018, 09:40 PM
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Originally Posted by erko1905
255/35 & 305/30 also works on 20s, in Michelin PS4S
I was planning to just upsize rears and run
245/35/20 with 305/30/20
do I need to upsize fronts too?
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Old 03-26-2018, 09:43 PM
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erko1905
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Originally Posted by M3to911s

I was planning to just upsize rears and run
245/35/20 with 305/30/20
do I need to upsize fronts too?
I don't think it's a "need", 245/295 is still plenty of tire.

I personally like the 255/305 better. I do have the Sport Technos, which are half an inch wider (9 & 11.5).
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