360 Michelin Pilot Super Sports to fit 360 OEM rims - Ferrari Life
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post #1 of 26 Old 01-27-2014, 03:36 AM Thread Starter
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Michelin Pilot Super Sports to fit 360 OEM rims

Gents
I've been shopping around for a set of Michelin Pilot Super Sports to replace the Pirelli PZero's that are on the 360 now.

Unfortunately all the suppliers I contacted dont seem to be able to supply them in the sizes as specified by Ferrari, but they can get them close...

OEM Spec is:
Front 215/45/ZR18 (89Y)
Rear 275/40/ZR18 (99Y)

Michelin Pilot Super Sport closest option is:
Front 215/40/ZR18 (89Y)
Rear 275/35/ZR18 (99Y)

Any major issues to be worried about if I were to put these sizes on? Traction control, ABS, Speedo, etc????

Any advice much appreciated.

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post #2 of 26 Old 01-27-2014, 06:04 AM
 
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Hehe...I wanted to replace the Pilot Sports 2 on my 360 too.I wanted the Michelin PSS...But they don't produce them in our OEM rims sizes.Finaly,i got the Pirellis...I would like to save you time and effort...
First of all,i looked also in other tires,but i couldn't find the exact sizes,i couldn't find 2013-2014 production tires etc.Also,some of them had wrong speed indicator(i know it is not very significant),wrong weight load etc.The price is one factor that you may consider,but i thought that my car deserved the best...The best options are:Pirelli P Zero System(you have them right now),Bridgestone RE-050A(i couldn't find 4 tires that have been produced in later 2013),Bridgestone S02(old tire,i would not recommend it),Bridgestone RE-11(one of the best,but unfortunatelly they won't import them in my country.The best option along with the Michelin PSS and Pirelli P Zero Corsa),Yokohama AD048(r).They won't import the Yokohamas here,also.
In my opinion,stick with the factory sizes.Other thatn the ABS/speedo problems,other problems may occur..For example,the balance of the car may change...Also,i had a talk the other day when i got my Quattroporte serviced and the mechanic told me that if i changed the sizes,it may have hurted the diff...I don't know if this is ''standard'',but with the history of already a broken diff,i wouldn't take the chance...If you have any other questions,feel free to ask!

When in doubt,flat out!
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post #3 of 26 Old 01-27-2014, 06:09 AM
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GREAT tires; however, I have them on HRE 19" wheels on my 360.

You could always put OEM wheels on the car
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post #4 of 26 Old 01-27-2014, 07:18 AM
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Hi Barry. No problem getting the 19" Michelin PSS tyres but surprised that the 18" aren't available. Might have to go for some new rims too, on a Red Modena CS rims look brilliant.

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Michael

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post #5 of 26 Old 01-27-2014, 07:56 AM Thread Starter
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Thanks for the info guys...

So after all that deliberating looks like Michelin PSS's won't be going on the 360 after all...

Ferrari's: 360 Modena, 550 Maranello
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post #6 of 26 Old 01-27-2014, 12:12 PM
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Barry- The trick is to get tires that are approximately the same height as the OEM tires, and your alternatives are quite a bit smaller in diameter than OEM at 24.77" F and 25.58".

OEM fronts are (215x0.45x2)/25.4 +18=25.62" OEM rears are 26.66"

So you need tires about an inch different in diameter front to rear that will go on 7.5" and 10" wide 18" wheels. Anything over about 4-5% difference in F to R differential and the ABS gets unhappy, although it does not care if both tires are taller or shorter than OEM if that F-R differential is maintained. Your speedometer and odometer will care, but not the ABS.

Looking through the TireRack catalog, looks like you have one choice for PSS fronts and two for rears, all of which will fit your wheels and are close enough F to R not to bother ABS

F 225/40 18 25.09" R Option 1 265/40 18 26.35" R Option 2 285/35 18 25.85"

Both of these tires are a bit shorter than OEM, so rear ride height will be lowered about 0.16" with Option 1 and 0.41" with Option 2. Speedometer error with Option 1 will be a little over 1% low and with Option 2 about 3% low. Since Ferrari speedometers are notoriously high reading...

Taz
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post #7 of 26 Old 01-27-2014, 03:17 PM Thread Starter
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Quote:
Originally Posted by tazandjan View Post
Barry- The trick is to get tires that are approximately the same height as the OEM tires, and your alternatives are quite a bit smaller in diameter than OEM at 24.77" F and 25.58".

OEM fronts are (215x0.45x2)/25.4 +18=25.62" OEM rears are 26.66"

So you need tires about an inch different in diameter front to rear that will go on 7.5" and 10" wide 18" wheels. Anything over about 4-5% difference in F to R differential and the ABS gets unhappy, although it does not care if both tires are taller or shorter than OEM if that F-R differential is maintained. Your speedometer and odometer will care, but not the ABS.

Looking through the TireRack catalog, looks like you have one choice for PSS fronts and two for rears, all of which will fit your wheels and are close enough F to R not to bother ABS

F 225/40 18 25.09" R Option 1 265/40 18 26.35" R Option 2 285/35 18 25.85"

Both of these tires are a bit shorter than OEM, so rear ride height will be lowered about 0.16" with Option 1 and 0.41" with Option 2. Speedometer error with Option 1 will be a little over 1% low and with Option 2 about 3% low. Since Ferrari speedometers are notoriously high reading...
Thank you Terry!
That is exactly the info I could never have come up with myself.

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post #8 of 26 Old 01-29-2014, 04:59 AM
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G'day Barry. What year is your car? Early 360's can be sensitive to changing the tyre sizes as evidenced by the issues people have had when putting 19" rims on 1999 and 2000 year cars.
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post #9 of 26 Old 01-29-2014, 08:08 AM
 
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With the 19'' OEM challenge stradale rims and tires,the wheel height remains the same...Only the width changes...It is odd...Unless you are talking abouth fitting 19'' with other tire sizes...

When in doubt,flat out!
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post #10 of 26 Old 01-29-2014, 09:33 AM
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There was some funny stuff with very early 360s that seemed to have more to do with ABS. That has never been adequately explained, since the only changes to ABS were changing all the pipes from pump to control unit at Assembly Number 57493. The ABS unit itself and the hub with sensors remained the same throughout production, and that is where you would expect the problems.

The change to slightly different diameter tires should not affect any of the 360s, but logically, neither should putting on 19" wheels with the same diameter tires as the 18" wheels.

Taz
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post #11 of 26 Old 01-29-2014, 03:39 PM Thread Starter
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Quote:
Originally Posted by voicey View Post
G'day Barry. What year is your car? Early 360's can be sensitive to changing the tyre sizes as evidenced by the issues people have had when putting 19" rims on 1999 and 2000 year cars.
Hey Aldous! It's a 2000 model, though looks like the PSS's might not be a runner. My tyre supplier can't find the 285 35 18s. Looks like they are a US only size. So might be back to pZero's...

Ferrari's: 360 Modena, 550 Maranello
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post #12 of 26 Old 01-30-2014, 06:06 AM
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Quote:
Originally Posted by voicey View Post
G'day Barry. What year is your car? Early 360's can be sensitive to changing the tyre sizes as evidenced by the issues people have had when putting 19" rims on 1999 and 2000 year cars.
What issues are those?
My 19" HREs seem to be doing fine on a 2000 stickshift model.
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post #13 of 26 Old 01-30-2014, 08:10 AM
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I'm not sure what the exact cause of the issue is but the symptoms are a hard brake pedal and the ABS cutting in early. It occurs in early (2000 or 1999) cars but not all cars of this age are affected - you will only know if you fit 19" rims (or different sized tyres).

Barry, I would urge you to stick to stock tyres sizes unless you can borrow a set of 19" rims and tyres for a short while. If your car can handle the change in rolling diamater then 19" rims with MPSS are the way forward.
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post #14 of 26 Old 01-30-2014, 08:26 AM
 
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He can fit 19'' wheels with the tire sizes of the 360 CS.That way the diameter remains the same.If the PSS's are sold in these sizes...
-Barry,i couldn't find this size too,in Greece.

When in doubt,flat out!
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post #15 of 26 Old 01-31-2014, 02:26 AM
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Quote:
Originally Posted by sergio360 View Post
He can fit 19'' wheels with the tire sizes of the 360 CS.That way the diameter remains the same.If the PSS's are sold in these sizes...
-Barry,i couldn't find this size too,in Greece.
That is incorrect. With an early car there is a risk that 19" wheels will upset the ABS.
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post #16 of 26 Old 01-31-2014, 07:32 AM
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We don't need no ABS
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post #17 of 26 Old 01-31-2014, 08:33 AM
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Originally Posted by 360 Modena View Post
We don't need no ABS
I know that you're joking but to be pedantic, the effect is the opposite of what you imply - the ABS will cut in early!
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post #18 of 26 Old 01-31-2014, 10:25 AM
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Voicey- Not all 1999s or 2000s have that problem. It is spotty with no technical explanation for why it happens. There were no major changes to the ABS system (except pipes) or hubs, with ABS sensors, from the early to late 360s.

Taz
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post #19 of 26 Old 02-01-2014, 04:25 AM
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Not a F car, but changing my RUF's Pirelli to the Michelin next week.

w/ smiles
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post #20 of 26 Old 02-01-2014, 11:32 AM
 
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Quote:
Originally Posted by voicey View Post
That is incorrect. With an early car there is a risk that 19" wheels will upset the ABS.
I can't think of just one reason why the ABS will have problem if the wheel diameter(so,the radius)remains the same...Unless the OEM 18'' 360 wheels and OEM 360 CS wheels have different diameter...

When in doubt,flat out!
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