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Tyre Size for 20 x 10/12" Wheels

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6 replies to this topic

#1
Colin8989

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Before I ask about tyres I am getting lots of conflicting information after searching here and Google.
I just got a set of 20x10 and 20x12 Signature wheels and I am struggling to find 335/30/20 and 285/30/20 Michelins so now I am looking at getting R888 or R888R but reading online and speaking to people they say that the 315/285 R888 is gonna burn out the FWD unit.
Any advice regarding what my best options are would be great I'm looking for a safe comfortable set up for daily driving that won't fry any part of my drivetrain.

Thanks.

#2
choerizo

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You want the Front and Rear diameters as close to the same size as possible. Ideally a square setup works best, but that will be hard to find a tire that fits both 10" and 12" wheels. For staggered setups the popular and closest ones that match for maximizing tread:

 

Michelin Pilot Super Sport 285/35ZR20 (27.9"), 335/30ZR20 (28") or 345/30ZR20 (28.1")

Michelin Pilot Sport 4S 285/35ZR20 (27.9"), 345/30ZR20 (28.2")

Michelin Pilot Sport Cup 2 285/35ZR20 (27.9"), 345/30ZR20 (28.2")

 

The 285,315 setup for R888, R888R, NT-01 will technically work but may increase drive train wear.


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#3
gtrguyinaz

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One thing I did notice when I got rid of run flats is the softer side wall on MPSS. My next set of tires , I am going to try 285/30/20 and 295/30/20. This will result in a 4 % increase in speedo MPH but may improve the stiffness in the side wall. It should . All speedos are 3 mph reduced from actual so the speedo will now be only slightly off from actual. 1 mph faster than perfect. I am considering getting  sport cup2's since I only drive 3,000 miles per year. My MPSS still look perfect so 1 track day should wear them out in the fall. In AZ, it is too hot to play till October. No track days in the last 2 years because of other interests.


Edited by gtrguyinaz, 25 June 2017 - 07:52 AM.

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#4
choerizo

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I've heard the smaller sidewall translates to faster heat transfer so they may get "greasy" faster.


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#5
LuvSpeed

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I just ran 315 R888R / and 275 NT-05 at the track yesterday.  My previous set up was 315/285 R888.  Decided to try the 275 NT-05 up front with the posts about speed differential.  The circumference is supposed to be a close match.   I wondered how the NT-05s would do compared to the previous R888s.  The NT-05s have a 200 tread wear instead of 100 for the NT-01 / R888R.

 

While driving the car, I felt the car pushing some more than usual.  Not quite the grip.  However, I was pleasantly surprised with my lap times.  No different than my previous set-up.

 

Attached video, you can hear the tire complaining.  I admit, I am not the best driver,  but I have fun.  Was slowed a little by the GT3, and I had a ride-along showing the track.  2:03 not a bad time at High Plains Raceway.

 

This setup can be a street setup that provides better grip than MPSS (or 4S).  Can also be a fair track set-up providing some less grip than NT-01 / R888R, but the tires might last longer..  

 

https://youtu.be/sKB4YswZFz0


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'17 Huracan, pretty much stock
'09 GTR
'14 Viper TA#3

#6
Colin8989

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Sorry I never got notifications of the replies here. Thanks for all the input I think I will go with MPSS initially as it is mainly a street car so I believe they are the best all round.

#7
jdmrb1

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Running a 10.5 with 295 front and 12 with 335 rear MPSS I have wide fenders




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