Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Wheels & Tires

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-05-2017, 04:43 PM
Registered User
 
Join Date: Mar 2010
Posts: 151
large diameter wheels

Is there a real benefit to the driving and handling with say 20 inch tires for someone who is not a race car driver? All new cars today come with bigger and bigger tires and rims.
Every time I drive in a car with those big rims with low profile tires the ride is so hard my teeth rattle.
Am I missing something?


jz
Reply With Quote
  #2  
Old 06-05-2017, 05:17 PM
Administrator
 
Join Date: Mar 2016
Location: Los Angeles, CA
Posts: 945
I absolutely agree with you and think it's for "aesthetics" - not that they add any. I understand that the trend is going towards larger cars, but other factors should also be considered when design takes place. If you're interested about wheel fitment and spacing/offsets, take a look at the link below. Great, general knowledge to have.


Wheel Fitment & Spacing Guide
Reply With Quote
  #3  
Old 06-09-2017, 09:56 AM
oldsinner111's Avatar
a parent should die first
 
Join Date: Nov 2008
Location: bristol,tn
Posts: 4,831
turbobandit uses big tires,not pussy tires has he calls them
__________________
usaf veteran ecm repair 4 years,cnc machinist 11 years,s320 best time with nos 14.6 1/4 mile
Reply With Quote
  #4  
Old 06-27-2017, 07:52 PM
Kenny Blankenship's Avatar
Registered User
 
Join Date: May 2017
Location: IE CA
Posts: 20
Quote:
Originally Posted by zakkkk View Post
Is there a real benefit to the driving and handling with say 20 inch tires for someone who is not a race car driver? All new cars today come with bigger and bigger tires and rims.
Every time I drive in a car with those big rims with low profile tires the ride is so hard my teeth rattle.
Am I missing something?


jz
No. Some time ago one of the auto magazines did a comparison on a car (I think BMW 3 series) between 15 and 19 inch wheels. They found going too large (18, 19") actually can hurt performance if the car is not tuned for those wheels.

Gas mileage suffers too. On a Jetta TDI (a more extreme example) I lost about 2-4% gas mileage going from 15" to 16" wheels and another 5% going from 16" to 17" wheels. So about 4 mpg going from 15" to 17" wheels, along with slower acceleration (it is noticeable).

Wide tires in front also affects steering. An old BMW 5 series feels better with 195 or 205 tires in front compared to 225, despite the fact the car grips better.
__________________
1985 300sd
1982 733i
2016 Frontier Crew Cab 6 spd.
Reply With Quote
  #5  
Old 06-29-2017, 05:26 PM
Registered User
 
Join Date: Mar 2010
Posts: 151
So I am not crazy thanks.
Back when I bought my 2015 ML 250 Bluetec it was listed as having 18" rims which I wanted , but they turned out to be 19's which the MB salesman termed "an upgrade". I bought the car and love it , but after the first 35K miles or so I bought fatter tires, going from 50 series to 55 series and the ride is noticeably "softer" over NJ's numerous potholes and bumps etc. But the MB dealer thought I committed a mortal sin. The tire diameter went from 29" to 29.5 ". I don't know what that does to the MPG but the ride is more forgiving and the pep seems unaffected.
Here's to fat....tires!
jz
Reply With Quote
  #6  
Old 07-09-2017, 01:06 PM
savas's Avatar
Registered User
 
Join Date: Mar 2001
Posts: 974
Adding to Kenny's comment, these were the results. Basically, smaller wheel equals better MPG and acceleration at the cost of lower cornering g's and longer braking distance.




They primary reason to upsize, in my opinion, is to get access to higher performance summer tires. Going up to 16" will do that if higher performance is what you are after. In this test they used m+s tires on all sizes to keep it even but going with a summer tire will reduce braking distance considerably.
__________________
1989 300E 350,000 miles and counting
Reply With Quote
  #7  
Old 08-08-2017, 10:33 AM
Mighty190's Avatar
Registered User
 
Join Date: Apr 2016
Location: Lafayette Indiana
Posts: 132
The reason modern cars have huge wheels is because the wheel arches and "belt lines" are much higher now. This is because of all kinds of safety requirements. The large wheels help keep the slabside look in check. It is also necessary to some degree to clear the huge brakes on modern 2.5 ton cars. Everything needs to stop like a Porsche now while weighing as much as a Cadillac.
__________________
Follow the team at https://www.facebook.com/MacIntyreMotorsports/
Reply With Quote
Reply

Bookmarks

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
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:10 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page