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G37 OEM wheel & Tires (Specifications) *For Reference*

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G37 OEM wheel & Tires (Specifications) *For Reference*

Old 05-03-2018, 07:17 PM
  #196  
slartibartfast
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I would like to remind everyone this thread is NOT for asking questions about fitment, there is already a stickied thread for that. This thread is a repository for OE wheel and tire specifications. Thanks.
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Old 08-08-2018, 04:43 PM
  #197  
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Hello all,

A few months ago I went from my stock tires of 225/45 in the front and 245/40 rear to 245/40 front and 275/35 rear.

My mileage seems to have decreased from around 19mpg to 16-17. At first I thought I was just driving more aggressively to test my new tires, but after a few months and several tanks of gas I think the decrease is real. I did not think going a little wider would have that much of an effect on my mileage, did anyone else notice this when going wider? The diameter is exactly the same. Nothing else changed except the tire width.

I want to make sure this can be attributed to the tire width rather than some other issue.

Thank you
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Old 08-08-2018, 05:56 PM
  #198  
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Quite often, if changing tires affects diameter, rolling resistance and/or weight, you can see drastic fuel economy differences.
A wider tire, deeper tread and/or stickier compound will absolutely affect mpgs because rolling resistance was increased. On some hybrids, they lose up to 7 mpg depending on which tire a certain trim level is delivered with.

I lost 4 mpg on my truck when I bought new tires for it. They are the same size as previous tires, but a different manufacturer and they have the winter logo on them, they are much stickier than the previous tires, so they are great in the winter, but damn, I immediately dropped to 12 mpg after putting them on. I'll probably go back to the previous tires some day.
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Old 08-08-2018, 05:59 PM
  #199  
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Originally Posted by takemorepills View Post
Quite often, if changing tires affects diameter, rolling resistance and/or weight, you can see drastic fuel economy differences.
A wider tire, deeper tread and/or stickier compound will absolutely affect mpgs.

I lost 4 mpg on my truck when I bought new tires for it. They are the same size as previous tires, but a different manufacturer and they have the winter logo on them, they are much stickier than the previous tires, so they are great in the winter, but damn, I immediately dropped to 12 mpg after putting them on. I'll probably go back to the previous tires some day.
Thanks for the info! Dang, I should trade my car in for a Prius... gas is expensive in California. Maybe when these tires wear out I'll go back to the stock size!
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Old 08-08-2018, 06:05 PM
  #200  
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Okie dokie

Last edited by takemorepills; 08-08-2018 at 06:35 PM.
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Old 08-08-2018, 06:27 PM
  #201  
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Once again, this is not a chat thread. Please limit your posts in this thread to the OE wheels.

Thanks.
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Old 11-23-2018, 07:34 PM
  #202  
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2014 q60s 15 spoke Sport package wheels
​​​​​​
front 19x8.5 +43 weigh approx 25.5lbs
Rear 19x9 +45 weigh approx 29lbs
​​​​​​
weights were via bathroom scale minus weight of tires based off tirerack specs. Tpms and wheel weights still attached although the wheels seemed fairly true as minimal weights were on them.
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Old 01-10-2019, 07:38 PM
  #203  
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To elaborate on the above post...
WITHOUT tpms sensors or tires or weights...

Fronts are about 27lbs
Rear roughly 27.5lbs
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