Tirerack
Use the following links to go directly to useful tirerack winter items: Tirerack Winter Tires. Gary's Winter Tire FAQ.
Using the links directly supports E90Post with tirerack sales commision!

  E90Post
 


The Tire Rack

   PLEASE HELP SUPPORT E90POST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > 330xi tire size; changing to go-flats



Wheels and Tires forum Sponsored by The Tire Rack
Please help to directly support e90post by doing your tirerack shopping from the above link. For every sale made through the link, e90post gets sponsor support to keep the site alive. Disclaimer

Reply
 
Thread Tools Search this Thread
      02-18-2009, 11:01 PM   #1
Clat
Registered
0
Rep
1
Posts

Drives: 2006 BMW 330xi - Jet Black
Join Date: Feb 2009
Location: Upper Midwest USA

iTrader: (0)

330xi tire size; changing to go-flats

I have a low mileage 2006 330xi sedan with std suspension and have reached my limit with RFT (run flat tires). I am preparing to changeout to go-flats and am interested in your opinion regarding size. I can't tell you how much I despise the low-profile RFT's. My intention is not to debate the merits of RFT vs go-flats; I've made my decision. What I really want is help with tire size. This is not a track car so ride comfort with modest steering response is my goal as well as moving to a tire that will better handle potholes. My question is this: will the 225/45/17's provide the type of pre-RFT era ride comfort I want? My alternative is to move to 225/50/17's which I've confirmed will fit and will give me .45 inches more sidewall. The extra sidewall would provide the forgiveness with potholes I'd like and improve the ride quality but is it necessary? I know that the taller tire will alter the speedometer readings but my E90 has a speedo that is biased 7% high and this will correct it a bit.

What do you think about the sizes? Is the 225/45/17 go-flat enough for what I want to accomplish? Or should it be 225/50/17's?

Also, any opinions about a high end grand touring tire that rides well and that you have good experience with? Thanks for your comments.
Appreciate 0
      02-19-2009, 04:15 AM   #2
VMRWheels
BimmerPost Supporting Vendor
VMRWheels's Avatar
2080
Rep
25,980
Posts


Drives: BMW
Join Date: Jun 2007
Location: Anaheim, CA

iTrader: (4)

Garage List
2013 BMW M3  [10.00]
2015 BMW M4  [0.00]
2013 BMW F30  [0.00]
2014 BMW F22  [0.00]
2013 BMW F06  [0.00]
Even though you might not mind going 225/50/17 and throwing off the odometer and speedo, rubbing issues might occur during compression and full cabin of the car since the sidewalls are significantly taller then the 45's. It might work on one car and it might not work on the next. Each car is setup differently so its a challenge to confidently say it will or wont.

IMO, i think the 225/45/17 Non-RFT's will do you good and be a lot more comfortable then the RFT's since the sidewalls are not as stiff. Keep a spare in the trunk to be safe!

-Charles@VMRWheels
__________________
Appreciate 0
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 08:13 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST