life expectancy for tires - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series & 8 Series > 8 Series G15 (2018 - Current)

8 Series G15 (2018 - Current)

Reply
 
Thread Tools Display Modes
  #1  
Old 03-07-2019, 06:48 AM
bs0604 bs0604 is offline
Registered User
 
Join Date: Mar 2019
Posts: 3
Mein Auto:
life expectancy for tires

I am considering buying a new 7 series or 8 series. I have never had a BMW but believe these cars have run flat tires. How many miles can I expect from a set of these tires? I live in Florida (US) and drive 18,000 highway miles a year.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 03-07-2019, 07:20 AM
Autoputzer Autoputzer is offline
Officially Welcomed to the 'Fest
Location: NW Floriduh
 
Join Date: Mar 2014
Posts: 8,965
Mein Auto: 2014 535i + 2018 X3 30i
Like with EPA fuel economy... you mileage may vary.

The M850i has staggered tires. That means no front-to-back rotating. The driven wheels on a two-wheel-drive car will wear more. With BMW xDrive, the power is split about 60-40. So, the M850i's rear tires will still wear faster than the front, but the difference will be less than with a RWD car.

RFT's tend to wear faster than non-RFT's, because they concentrate the wear on the inside and outside of the contact patch. You can stop this by overinflating them. But, that makes the car ride and handle horribly.

Performance tires wear faster because the rubber is "stickier." It's sort of like one of those really good white-rubber pencil erasers, sticky means fast wear.

Throw in almost 600 h.p. for the M850i, and maybe 4300 pounds of curb weight and you have the perfect storm for tire wear. Unless you're driving Miss Daisy around, plan on replacing tires every... oh, let's see... 18k miles or once a year. The good news is that tires are cheap... trivial, actually... compared to what you'll be paying in depreciation.

Highway miles are easier on tires though. So, you might get 25k miles if you're lucky.

I have high-performance, non-RFT's on my 4100 pound, 300 h.p. 535i. I also have a square set-up (all tires the same size), rotate my tires, and practice "tire whispering" (adjusting the pressure for even tire wear). Doing all this, I'll get between 35k and 40k miles out of my tires. I'll get 55k to 60k miles out of the non-RFT, square set-up, SUV (low performance) tires on Frau Putzer's X3 30i xDrive.

Last edited by Autoputzer; 03-07-2019 at 08:55 AM.
Reply With Quote
  #3  
Old 03-07-2019, 07:27 AM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is online now
Nuclear engineer
Location: Washington Island, Wisconsin, thru Death's Door
 
Join Date: Apr 2015
Posts: 13,222
Mein Auto: CPO2012 X5 35d M57(E70)
I ditched my CPO OE at 44K miles with useful tread remaining. Alignment alignment alignment, inflation, rotation.
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series & 8 Series > 8 Series G15 (2018 - Current)
Today's Posts Search
Thread Tools
Display Modes

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



Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Life expectancy of original Conti's. OrientBlau 3 Series & 4 Series 34 01-15-2005 11:10 PM
Life, Explained glaws Off-Topic 14 07-15-2004 10:32 AM
New York City blackout... worst day of my life? Hercules Off-Topic 9 08-15-2003 10:23 PM
My life changed today. ARCHER Off-Topic 31 08-09-2003 06:01 PM
Import Life 3, June 28th Portland Oregon Ty Vil Regional Forums 0 06-03-2003 12:43 AM


All times are GMT -7. The time now is 05:46 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.