Wider Pirelli PZero Rear Tires for my 07 QP Auto- 295, 305? - Maserati Forum
 
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post #1 of 15 Old 02-04-2019, 11:59 PM Thread Starter
 
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Question Wider Pirelli PZero Rear Tires for my 07 QP Auto- 295, 305?

I need new rear tires and plan to stick with Pirelli PZeros. Back when I purchased my 07 QP Auto I upgraded to the 20" Maserati GranCabrio Wheels in Mercury Grigio(the darker grey/anthracite color)- Seen in the sample pic I attached. Im running all Quattroporte 20" factory spec size Pzero tires so the speedometer readout is not thrown off. Not using or plan to use spacers or make shock adjustments. The specs for the rear wheels is 20" x 10.5" with 37.5mm offset with Pirelli PZero 285/30/ZR20 on them. Im looking to go with Pirelli PZeros in either 295's or 305's 30/ZR20 to get more rim protection/rim fit look along with a little wider stance. I used the tire/wheel fitment calculator and it showed little to no impact on my speed readout and no fitment issues going with either the 295's or 305's 30/ZR20 sizes. Looking for feedback to confirm I should have no issues with either size in Pirelli PZeros and to see if anyone has pics they can share where they are running the same spec size rims on their QP with either of these 2 wider PZero sizes? Just to note again this is without using spacers or doing any shock/spring changes which I'm aware give the tires a wider stance look/reduce wheel well gap respectively. Thank you and I really appreciate it.

Me&MyMaserati
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post #2 of 15 Old 02-05-2019, 07:01 AM
 
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I recently got some new custom made ADV.1 wheels for my italian beauty, 20x9 Front with 255/35-20 Michelin PSS and 20x10.5 rears Originally I put 305/35-20 Michelin PSS in the rear to give it a nice wide meat stance and to fill the wheel gap, this accomplished that however the speedometer was off by 5.5% below the stock reading and the edges bulged too much for my liking so I switched to a 275/35-20 which is only 2.5% off from the stock, this looks better and is closer to stock and is 6lbs lighter per wheel. However the 305/35-20s did not rub and were 1.5 inches larger in overall diameter and 1 inch wider so you will be fine if you run 305s. I may switch to 295/30's or 35's in the future. I almost wish I would have gotten 11inch wide rears so I could run 315s or even 325s in the rear, how great that would look, and yes they will fit, I measured.



If you have any questions, I'm around...


Rain pic is with 305/35-20, Underground Garage pic is with 275/35-20 and the outside my garage pic is with the 305/35-20.


-Cheers
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post #3 of 15 Old 02-05-2019, 11:20 AM
 
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Originally Posted by Me&MyMaserati View Post
The specs for the rear wheels is 20" x 10.5" with 37.5mm offset with Pirelli PZero 285/30/ZR20 on them. Im looking to go with Pirelli PZeros in either 295's or 305's 30/ZR20 to get more rim protection/rim fit look along with a little wider stance. Looking for feedback to confirm I should have no issues with either size in Pirelli PZeros and to see if anyone has pics they can share where they are running the same spec size rims on their QP with either of these 2 wider PZero sizes?
Me&MyMaserati

Hi You&YourMaserati,



the 295/30 ZR20 have been officially delivered by Maserati on the QP V 2008 Sport GT S models. I have them as Pirelli PZeros. No issues, great look, see the picture with the official 20" rims.
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post #4 of 15 Old 02-05-2019, 08:31 PM

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The 305/30 20 is definitely a taller tire, much more so than the 285s. The 295s are not quite as tall in addition, the 2008 has other performance options which may be designed to accommodate that. I would try a Craigslist set of used 305 30s first to guarantee you don't get a CEL before spending that much money on taller tires.

Also, I have 325/30s but mine are 19s, so I have a whole extra inch of height to play with.

Erik Di Somma
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post #5 of 15 Old 02-05-2019, 10:55 PM Thread Starter
 
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A big THANK YOU to all of you for the feedback/info on this. This definitely helps me. :-)

M&MM
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post #6 of 15 Old 02-06-2019, 06:50 AM
 
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Originally Posted by ErikDiSomma View Post
The 305/30 20 is definitely a taller tire, much more so than the 285s. The 295s are not quite as tall in addition, the 2008 has other performance options which may be designed to accommodate that. I would try a Craigslist set of used 305 30s first to guarantee you don't get a CEL before spending that much money on taller tires.

Also, I have 325/30s but mine are 19s, so I have a whole extra inch of height to play with.

I ran my 2007 Auto with 305/35-20's which is very tall for 3 months with no CEL so it's a viable option.



PS. I would love to see pics of your QP with the 325's , any rubbing issues ? Do you think their enough room for 335's ?
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post #7 of 15 Old 02-19-2019, 02:05 AM Thread Starter
 
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Just wanted to post an update....

I went with Pirelli PZero PZ4-Sport 305/30ZR20 tires to replace my Pirelli Maserati Spec 285/30ZR20 PZeros on now. The ones I went with are Lamborghini (L) spec Pirellis and met tire specs I needed. It has a higher load rating(103) and tread wear rating(300). I first did a vast search of Pirelli PZero in size 305/30RZ0 and then found the best price that at least met the core specs of my current rear tires. These PZ4-Sport (L) model tires were the best price I found in this size and found them online at an authorized Pirelli seller for $264.99 per tire(free shipping and no tax). I then went and located the same model tire on DiscountTires website and sent them a message on their site where it says "Did you find it cheaper?" (To see if I can deal with someone local in case of issues...and to make sure I received most current produced/Date Code tires. They contacted me within 24hrs and agreed to do a "Price Match" so I purchased them for $264.99 each out the door(that's w/ shipping & tax included). DiscountTire didn't have any in stock or in their warehouses so they are being shipped to me directly from Pirelli. As I said in my initial post I wanted to go with Pirellis again even though they wear quick and there are some really great options that have come to market over the past few years(better tread life, performance, price etc). I may consider switching things up next time, we'll see how it goes. Thanks again for everyones feedback and pics on tire sizes etc. Me&MyMaserati
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post #8 of 15 Old 02-26-2019, 10:01 PM
 
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Garage
295 35 20 in the rears.
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post #9 of 15 Old 03-20-2019, 11:28 PM Thread Starter
 
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Originally Posted by Me&MyMaserati View Post
Just wanted to post an update....

I went with Pirelli PZero PZ4-Sport 305/30ZR20 tires to replace my Pirelli Maserati Spec 285/30ZR20 PZeros on now. The ones I went with are Lamborghini (L) spec Pirellis and met tire specs I needed. It has a higher load rating(103) and tread wear rating(300). I first did a vast search of Pirelli PZero in size 305/30RZ0 and then found the best price that at least met the core specs of my current rear tires. These PZ4-Sport (L) model tires were the best price I found in this size and found them online at an authorized Pirelli seller for $264.99 per tire(free shipping and no tax). I then went and located the same model tire on DiscountTires website and sent them a message on their site where it says "Did you find it cheaper?" (To see if I can deal with someone local in case of issues...and to make sure I received most current produced/Date Code tires. They contacted me within 24hrs and agreed to do a "Price Match" so I purchased them for $264.99 each out the door(that's w/ shipping & tax included). DiscountTire didn't have any in stock or in their warehouses so they are being shipped to me directly from Pirelli. As I said in my initial post I wanted to go with Pirellis again even though they wear quick and there are some really great options that have come to market over the past few years(better tread life, performance, price etc). I may consider switching things up next time, we'll see how it goes. Thanks again for everyones feedback and pics on tire sizes etc. Me&MyMaserati

Wanted to give some additional feedback now that these tires have been mounted and been driving on them a couple weeks now. I was curious how the 305 size would look on the 20" GranCabrio (10.5" wide) rear rims I have on my 07 QP. I was happy to see there was no excessive tacky bulging and they fit/protect the rim nicely(no more of the riding on rubber bands look). The wider stance in the rear looks great and they filled up the wheel well nicely being a 30 aspect ratio tire. Since these were "L" marked Pirelli PZ4-Sport tires for Lamborghini (Huracan, etc) they had a higher load rating of 103 and with Lamborghini having the heavy engine weight in the rear.... also the wider you go with a tire, the wall of the tire has to be made to support it. What floored me the most is how much smoother the ride feels now. I no longer feel every little bump in the road making the driving experience so much better. These Pirelli PZ4-Sport (L) 103Y 305/30ZR20 exceeded my expectations on look, comfort, better rim protection, etc and getting both tires for $529.98 total out the door gave me exactly what I was looking for.
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post #10 of 15 Old 03-21-2019, 07:10 AM

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Glad to hear it worked out. What are some options for 18-inch wheels? I like my stock 18s but I'm wondering about tires wider than 285 for those rears.

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post #11 of 15 Old 03-21-2019, 01:24 PM

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Glad to hear it worked out. What are some options for 18-inch wheels? I like my stock 18s but I'm wondering about tires wider than 285 for those rears.
Honestly, you can really try anything as long as you stick with a stock overall height. The overall height of all QP wheels/tires are pretty much the same (wheels/tires combined). The 18s just have more sidewall than the 19s and a lot more than the 20s.

I am replacing my 325 rears for new ones this week.

Erik Di Somma
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post #12 of 15 Old 03-21-2019, 01:59 PM

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Here are some pics of my 325 tires and the car with them mounted. I always thought the 285s looked stretched when mounted on the 10.5 wheels. It actually looks ridiculous up against the front wheels whose tires fit properly. These tires make the fitment between front/rear look balanced.
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post #13 of 15 Old 03-22-2019, 03:52 AM Thread Starter
 
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Here are some pics of my 325 tires and the car with them mounted. I always thought the 285s looked stretched when mounted on the 10.5 wheels. It actually looks ridiculous up against the front wheels whose tires fit properly. These tires make the fitment between front/rear look balanced.
Awesome! 325s too! WOW!....You're absolutely right about 285's in the rear.... When I bought the GranCabrio rims a couple years ago I went with the 285/30/20 Maserati Spec. 20" QP Pirelli tires and always felt it left the back end looking kind of skimpy(riding on rubber bands look and too much spacing in the wheel well). I was surprise how these 305s addressed all the things that were lacking while still keeping the 30 aspect ratio. It was kind of a gamble where all stars aligned....a different brand, how manuf and/or load index etc, of the same size tire could have gave me a totally different outcome.
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post #14 of 15 Old 03-22-2019, 06:25 AM
 
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Originally Posted by ErikDiSomma View Post
Here are some pics of my 325 tires and the car with them mounted. I always thought the 285s looked stretched when mounted on the 10.5 wheels. It actually looks ridiculous up against the front wheels whose tires fit properly. These tires make the fitment between front/rear look balanced.

That looks nice, a little bulge but considering these are on 10.5 inch factory wheels I'm actually not surprised they don't bulge more. Do you have any irregular wear on the inner and outer edges ?
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post #15 of 15 Old 03-25-2019, 02:38 PM

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No irregular wear whatsoever. The tires completely corrected the "skating" issue over choppy surfaces as well. After driving on the 325s for about 60K miles (multiple pairs, of course), I realized how, for a few reasons, the QP NEEDS wider tires than the stock 285s. It improves the car in many areas other than looks.

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