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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E89 Z4 (2009 - current)

E89 Z4 (2009 - current)

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  #1  
Old 01-28-2013, 11:07 AM
BMWZ4RIDER BMWZ4RIDER is offline
Z4 35i Rider
Location: S. Dennis, MA- USA
 
Join Date: Nov 2012
Posts: 94
Mein Auto: 2009 Z4 35i
What Wheel/Tire Package are you running on your E89

My 2009 35i has a mint condition set of OEM wheels:
BMW OEM, 293, Multi Spoke wheels, TPMS and brand new (700 miles) Bridgestone Potenza RFT tires
Front- 18 x 8 front
Tires- 255 30R18

Rear-18 x 8.5 Rear
255 40R18

I am considering selling these wheels and tires and going to a new set of 19" s.

What is everybody running?

Down side to 19's? Rougher ride?

I see everybody dumping the RFT's but these were just put on at purchase.
Rougher ride- YES but safety in case of a flat- YES. Toss up for me.

Going from18's to 19's- does this effect the rest of my 4 Year/50K warranty?
Does this effect the speedo reading?
I would not think so as BMW offers 19's as standard.

Who is the best to help determine the correct offset? I have never put on a set of wheels/tires that require offset so I am un familiar with the whole issue. I mostly under stand it positions the wheel and tire correctly on the hub to stop rubbing etc. Help here is appreciated.

Any deals from this site/site vendors?

Pictures of your Z (with wheels) are appreciated.
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  #2  
Old 01-28-2013, 05:57 PM
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HerrK HerrK is offline
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Location: CA
 
Join Date: Jan 2010
Posts: 596
Mein Auto: 2011 Z4 35i
Just had two new rear wheels installed at no cost due to cracks. Ditching the BS RFT's and going for Michelin Pilot Super Sports 235/40-19 (F) & 265/35-19 (R) on my 296's. A little wider & taller. Still think the 296's are some of the best looking BMW wheels - with the updated rears no more crack fears.

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May 2010 ED l 2011 35i l Crimson over Ext'd Coral Red w/brushed Alum l 6sp MT l Prem Sound l Sport Pack l 296's l Comfort Access l Alarm l Power Heated Seats l & Nav.
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  #3  
Old 02-02-2013, 01:00 PM
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rmorin49 rmorin49 is offline
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Location: Hagerstown, MD,
 
Join Date: Jan 2007
Posts: 4,132
Mein Auto: 2011 335d
I had my dealer remove the BS RFTs at delivery in the US. Sold them to a guy who needed new tires in order to turn in his 335i at the end of his lease. I had enough money to buy a set of Yokohama ENVigor UHP AS tires from Tirerack. I had them shipped to my dealer and then mounted and balanced them on my OEM 18" staggered wheels. I am running the OEM sizes, 225-40-18 front and 255-35-18 rear. I have about 8000 miles on my car with no issues. Tires provide decent handling, decent ride and decent performance in all weather including light snow. The latest generation RFTs are getting better but I still prefer non-RFTs.
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  #4  
Old 02-04-2013, 09:19 AM
morfinx morfinx is offline
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Location: Austin, TX
 
Join Date: Dec 2012
Posts: 42
Mein Auto: 2009 Z4 sDrive35i DCT
The general consensus is that Michelin Pilot Super Sport is the way to go. I had it on a previous car and they were pretty great.
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  #5  
Old 02-05-2013, 10:04 PM
ssarah ssarah is offline
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Location: Indianapolis
 
Join Date: Apr 2009
Posts: 54
Mein Auto: Z4
What air pressure are you going to run your tires on?
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  #6  
Old 10-30-2013, 05:50 AM
saihong saihong is offline
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Location: Hong Kong
 
Join Date: Dec 2010
Posts: 7
Mein Auto: BMW Z4 E85
I have a 3.5i and from my experience from my E85 I ditched my runflat right away. The car seems to stick to the ground much much better. But I still felt the lack of agility so I ditched my 296 19 inch wheel to Advan RS II which is super light. The handling is superb compared to the monster heavy 296, the acceleration is great and the transmission is much smoother. Before, because of the heavy 296, when the car auto shift down during deceleration, the heavy wheel would fight back the shifting down with inertia, causing a bass drum feel to the chassis. The downside is with much lighter wheel, the car seems to rock much more. While the original offset is 29 front and 40 rear, I now have all wheel 35 offset. Thinking of upgrading to KW V3
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