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| Wheels & Tyres Wheels, tyres, brakes and suspension |
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#46 | |
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Hardcore MB Enthusiast
Join Date: Jun 2007
Posts: 1,096
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#47 |
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Hardcore MB Enthusiast
Join Date: Dec 2006
Location: South Yorkshire & NRW Germany
Car: C240 Avantgarde with AMG Styling
Posts: 177
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You took out the "how did you get those figures" line, but I responded anyhow..
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#48 | |
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Hardcore MB Enthusiast
Join Date: Jun 2007
Posts: 1,096
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Quote:
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#49 |
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Hardcore MB Enthusiast
Join Date: Jun 2007
Posts: 1,096
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#50 |
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Hardcore MB Enthusiast
Join Date: Dec 2006
Location: South Yorkshire & NRW Germany
Car: C240 Avantgarde with AMG Styling
Posts: 177
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The travelling I compared on was motorway travel (Yorkshire-London) and I did experience the drop in MPG. Honestly, I was considering putting the old wheels back on before I sold them, but luckily enough the tinkering sorted it out…
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#51 |
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Hardcore MB Enthusiast
Join Date: Dec 2006
Location: South Yorkshire & NRW Germany
Car: C240 Avantgarde with AMG Styling
Posts: 177
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Last edited by skymastor; 12-06-2008 at 12:10 AM. |
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#52 |
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Hardcore MB Enthusiast
Join Date: Jan 2006
Location: South West
Car: W245 B170
Posts: 542
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If you notice a difference in fuel economy from changing to 18s then I think thats a little sad. Just my opinion but come on whats a few mpg in the grand scheme of things?
I personally can't say I've noticed any difference but they I've never sat down with a calculator to work out my MPG, I thought about, then decided to carry on living my life! Heres a couple of pics for you: ![]() ![]()
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#53 |
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Hardcore MB Enthusiast
Join Date: Aug 2007
Location: buxton, derbyshire
Car: C200k Coupe 2003
Posts: 1,012
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Nice pics BigMac' !!
Jay. . |
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#54 |
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Hardcore MB Enthusiast
Join Date: Mar 2004
Car: W204 C350 Elegance (1 of 97 left in the uk)
Posts: 7,275
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LOL. He's a modder...don't look at the car, look at his wife/girlfriend....
Head in hands "what am I doing with a man who photographs wheels on old airstrips" We've all be there, we've all been on the receiving end of that look!! Last edited by R2D2; 18-06-2008 at 03:29 PM. |
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#55 |
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Hardcore MB Enthusiast
Join Date: May 2007
Car: CLS55 AMG '05
Posts: 7,577
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Still reckon it needs to drop a bit at the back
![]() Looking forward to seeing it in the metal soon
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#56 | |
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Hardcore MB Enthusiast
Join Date: Jan 2006
Location: South West
Car: W245 B170
Posts: 542
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Haha that is hilarious me and the mrs just had a right chuckle reading that!!
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#57 |
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Hardcore MB Enthusiast
Join Date: May 2007
Car: CLS55 AMG '05
Posts: 7,577
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#58 |
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Hardcore MB Enthusiast
Join Date: Jul 2003
Car: Peugeot 403 Convertible
Posts: 28,810
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Back on topic.
Larger wheels are meant to increase rolling resistance due to the sidewall having less flex so not allowing the tyre tread to deform as readily thus creating more heat within the tyre. Heat is energy so is lost motion. I don't know whether this is going to happen in all cases but is the theory behind increased consumption on larger wheel sizes. It's also why lower profile tyres cause a greater tramlining effect. |
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#59 | |
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Hardcore MB Enthusiast
Join Date: May 2007
Car: CLS55 AMG '05
Posts: 7,577
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Quote:
Tramlining will be related to the contact patch and perhaps more importantly the tread depth. Consumption will be realated to frontal area and drag plus the rolling resistance.. Complicated..... |
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#60 |
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Hardcore MB Enthusiast
Join Date: Jun 2007
Posts: 1,096
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Drove home 250 miles tonight. No difference once again on the 18s. Average MPG this time was slightly better than ussual.
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