1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

My E350 has staggered sized (wider rear) wheels, why ?

Discussion in 'Bodywork, Tyres, Wheels & Trim' started by Dewar, May 18, 2017.

  1. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    To be fair, mine is a saloon and Carl's is an estate, so the coupe might be different? Not sure on that....
     
  2. Frosty149

    Frosty149 Senior Member

    Messages:
    1,195
    Likes Received:
    282
    Joined:
    Jan 9, 2017
    Location:
    Garden of England
    Your Mercedes:
    W207 '63 E350 coupe amg sport + toys
    Thanks John,
    I'll do some digging over the w/e
     
  3. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    Good luck
     
    Frosty149 likes this.
  4. C350Carl

    C350Carl Senior Member

    Messages:
    3,969
    Likes Received:
    317
    Joined:
    Feb 16, 2014
    Location:
    Middle East
    Your Mercedes:
    2013 E250 CDI AMG Sport Estate
    I meant to say. My C350 also had a space saver and I had HK in that. But it was again an Estate.
     
    Frosty149 likes this.
  5. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    9,504
    Likes Received:
    984
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W212 E220 AMG Night Edition; W211 E320 Avantgarde Estate Designo Edition
    If you have Bluetec in the 212 facelift, there is no room in the saloon for a spare wheel as the pig weewee tank takes up the volume of the wheel well. On the 213 they have made provision for this is a proper place. On the 212 estate I believe there is spare volume under the load space floor around the wheel well.
     
  6. Headhurts

    Headhurts Senior Member

    Messages:
    515
    Likes Received:
    49
    Joined:
    Jul 24, 2014
    Location:
    Norwich, Norfolk
    Your Mercedes:
    E350 Night Edition Estate/2016/Diesel
    Nope!

    No space on my S212 for spare wheel, unless I am missing something obvious.

    I rarely lift the floor cover though.


    Sent from my iPad using Tapatalk
     
  7. Frosty149

    Frosty149 Senior Member

    Messages:
    1,195
    Likes Received:
    282
    Joined:
    Jan 9, 2017
    Location:
    Garden of England
    Your Mercedes:
    W207 '63 E350 coupe amg sport + toys
    Ok,
    So I took the bags of sand general ****-shat out of the boot and had a peep...
    You're right there's a tank avec yes yes!
    No room for any type of spare.
    No ****** jack either!
     
  8. Frosty149

    Frosty149 Senior Member

    Messages:
    1,195
    Likes Received:
    282
    Joined:
    Jan 9, 2017
    Location:
    Garden of England
    Your Mercedes:
    W207 '63 E350 coupe amg sport + toys
    Wow, f*ck me, that swearing editors sharp!!!
     
  9. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    It ****ing is!
    Guess you've a **** tank then
     
  10. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    9,504
    Likes Received:
    984
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W212 E220 AMG Night Edition; W211 E320 Avantgarde Estate Designo Edition
    No ****ing jack because there's a compressor and a tub of ****ing goo!

    The pigpiss tank takes up the spare wheel well totally (its 24 litres...) so no roomeven for a spacesaver. But tbh the goo will do almost anything the spacesaver will. I was sceptical until I saw the warranty data for a million cars worth of goo.
     
  11. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    9,504
    Likes Received:
    984
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W212 E220 AMG Night Edition; W211 E320 Avantgarde Estate Designo Edition
    Hey it missed that one!!!^^
     
  12. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    What pigpiss?
     
  13. Frosty149

    Frosty149 Senior Member

    Messages:
    1,195
    Likes Received:
    282
    Joined:
    Jan 9, 2017
    Location:
    Garden of England
    Your Mercedes:
    W207 '63 E350 coupe amg sport + toys
    Nah, 'warranty' (mb)
    Pigpiss is fine
     
  14. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    9,504
    Likes Received:
    984
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W212 E220 AMG Night Edition; W211 E320 Avantgarde Estate Designo Edition
    Oof don't use the "w" swearword!!!
     
  15. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    Somewhat redundant word in MB world...
     
  16. Rotorhead500

    Rotorhead500 Senior Member

    Messages:
    3,314
    Likes Received:
    61
    Joined:
    Oct 19, 2012
    Location:
    Very South Devon
    Your Mercedes:
    And now... a C63!
    Me too... In a W204.
     
  17. Submariner1

    Submariner1 Senior Member

    Messages:
    3,057
    Likes Received:
    173
    Joined:
    Sep 3, 2016
    Location:
    Windsor Berkshire
    Your Mercedes:
    CL500 2009 5.5
    I very rarely fail to see your logic. But I am struggling with this one.
    I assumed just by calculation when they went from say 18" to 19" tyres MB adjust the rolling radius by a reduced tyre profile. So fundamentally the RR is the same or very close. So your wider tyres still have the same or extremely close RRs.

    Thus assuming the RR is the same, then the contact area front to back on the road (pressure adjusted) is the same.
    Therefore when you move from 255 to 285 you have 30 mm x the front to back dimension more touching the road.

    The knowledgeable salesman he was a rare breed, said wider tyres have pros and cons ... better grip in the dry and slightly less in the wet. ( yes more because of the extra footprint, but less because you lower the contact pressure. ( namely weight of car stays the same .. larger footprint equals lower lbs / square inch).

    TBH I have no technical expertise in this area, but I accepted one SL500 that the Option date on that build had closed (saved me a 2 months wait) it had all my selected options, but not the staggerred wheels. When the car came they said they had to get a new Info Plate inside the petrol flap, as they were fitting the bigger wheels so the pressures were incorrect.
    Hence I assume this pressure adjustment would ensure the same front to back footprint dimension was retained, ergo you would get an 11.7% increase in road contact?

    I do conceed that there is a probability that the wider tyres need a higher pressure just to keep the centre of the tyre inflated enough so it doesnt collapse and hence your theory could be correct.

    But I do struggle with the concept especially as most of the big v8 AMGs have wider staggered tyres, surely they are looking for better traction/grip?
     
  18. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    9,504
    Likes Received:
    984
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W212 E220 AMG Night Edition; W211 E320 Avantgarde Estate Designo Edition
    Better dynamics when cornering allowing for increased grip to cope with those bigger ANG hosses
     
  19. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    8,503
    Likes Received:
    936
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 AMG V8 Biturbo
    :confused:Yip try some spirited cornering with near 560 horses and skinny tyres and see how you get on...
     
  20. LostKiwi

    LostKiwi Senior Member

    Messages:
    6,702
    Likes Received:
    1,437
    Joined:
    Aug 25, 2006
    Location:
    Midlands, not east or west but middle.
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500, 04 Smart Roadster Coupe
    Ok Sub...

    The only thing holding your car up is the tyre. The tyre has a sidewall that compresses unless filled with air so the only thing really holding the car up is the air.

    Now air compresses and we see this from the way the tyre bulges at the bottom (if it didn't the tyre wouldn't deform). The tyre will therefore deform by an amount dependent on the weight on the tyre and its static pressure. Notice it doesn't depend on width.
    As the weight is borne by the air inside the tyre the pressure measured in psi will result in a footprint which is also independent of width. The clue is PSI. Pounds per square inch. Only a change in PSI (either through less tyre pressure or more weight) will change the tyre deformation and contact patch size.
    This is why we increase tyre pressure for increased loads. The extra weight will alter the deformation of the tyre and its contact patch hence allowing more heat build up. Increased tyre pressure counters this by reducing the contact patch and deformation hence allowing less heat build up.
    The wider footprint will have benefits in lateral stability of the tread but will have REDUCED traction in the fore and aft plane, especially in wet conditions.

    It seems counter intuitive but its true.

    http://www.autospeed.com/cms/article.html?&title=Tyres-Grip-and-All-That&A=108915
     
    Last edited: May 20, 2017
    Submariner1, Frosty149 and chardF like this.

Share This Page