CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

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Old Nov 8, 2013 | 10:39 AM
  #1  
eines's Avatar
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clk500
clk 320

would like to ask:
put a set of ssr gt-3 18" staggered 5mm F & 15mm R spacers
car feels heavy let off pedal and drops speed quicker than before
totally lost on this one
wife say it feels heavy using more fuel?
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Old Nov 8, 2013 | 01:56 PM
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CLS550
Are your new wheels lighter than the oem wheels? You put on 18 inch wheels on a car designed for 17 inch wheels. If you increased the tire width, it becomes even heavier. Unless you bought some light wheels, why wouldn't the car "feel heavier?"
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Old Nov 8, 2013 | 02:07 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If the tyre width has increased everything you are seeing/feeling is normal ^ +1.

Other than rolling resistance, wider front tyres have a remarkably negative effect on the aerodynamic cd of the car thus increasing fuel consumption.

When manufactuer's state the cd of a specific design it is always done on the base model with the skinniest tyres.
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Old Nov 8, 2013 | 02:31 PM
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wider tires and wheels but over all much lighter they are 3 piece wheels 18"x 9.5" rear
18"x 8.5" front inch larger than stock and spacer. Same height as stock wheel and tires
just wider
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Old Nov 8, 2013 | 02:34 PM
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clk500
your reply sound reasonable but it is considerable difference. My background is in muscle cars
never dealt with low profile tires and such just horsepower
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Old Nov 8, 2013 | 03:10 PM
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https://mbworld.org/forums/members/e...e-2-40442.jpeg

Last edited by eines; Nov 8, 2013 at 04:28 PM.
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Old Nov 8, 2013 | 03:23 PM
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It's a beautiful car. Those are beautiful wheels that look great. I'm sure the 3-piece wheels are lighter than stock at the same size. One for one, stock wheels and stock tires vs. larger wheels and wider tires, is the new setp up lighter? That is the question.
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Old Nov 8, 2013 | 04:05 PM
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total weight is lighter.... best way to describe is at low speed and let foot of gas is drops speed quicker ....can notice where before you coast... thought my wife was over sensitive but when I drove could feel it for sure
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Old Nov 9, 2013 | 11:08 PM
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Another negative effect of wider tires that people don't think about is that while the contact patch with the road is wider, it is much shorter longitudinally (front to back). Wile a wider contact patch helps with cornering, the shorter contact patch hurts straight traction, especially with wet starts and braking.
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Old Nov 10, 2013 | 04:11 PM
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Correct ~ there is a specific weight per contact patch ratio that is desireable. Wider is not always better.
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