OEM Rims weight question

[forzza1]

Hi All
Anyone knows what is the weight figure for our 19 inch rims? Is it true lighter rims will improve both performance and gas mileage? There are many rims out there in the range of 22-25 lb/rim.
Thanks

 

[ksoze]

Is it true lighter rims will improve both performance and gas mileage?

I would be shocked to see how a rim change could demonstrably effect performance in a car that is purposely burdened with sound deadening, a gazilion electronics and other weight effecting items as is. Would be better just to just shed the few extra pounds on a diet.

 

[Huddleston]

seems like a racecar question for a luxury sedan.

just get some carbon fiber wheels made.

 

[forzza1]

You got me wrong. i am not trying to convert my car to a racer. The purpose of this car is to be a blend of luxury and sportiness. The question was geared toward improvement and finding out if somebody on this forum went for a lighter version of aftermarket wheels...
Thanks

 

[Huddleston]

You got me wrong. i am not trying to convert my car to a racer. The purpose of this car is to be a blend of luxury and sportiness. The question was geared toward improvement and finding out if somebody on this forum went for a lighter version of aftermarket wheels...
Thanks

no I understood completely. I am just unsure how much difference a few pounds of weight savings in wheels would translate into improved performance on a 4500 pound car with as many electronic systems as this car has.

On a track prepped car like a Miata there would certainly be a difference.

On a car like the Genesis I am not sure there would be a point. My wheels are certainly lighter than the stock wheels but that it no way translated into improved handling or gas mileage. In order for either to be materially changed I think you'd need substantial weights savings far beyond what changing the wheels would yield.

 

[losboricua]

Actually if you reduce enough rotating mass between wheels and tires you can gain some MPG. The question is, it is worth the little gain compare to the cost of lighter wheels/tires?

 

[Huddleston]

Actually if you reduce enough rotating mass between wheels and tires you can gain some MPG. The question is, it is worth the little gain compare to the cost of lighter wheels/tires?

that was my point. there is certainly merit to the physics and there are undoubtedly benefits. my take is that on our cars changing wheels would not yield any material difference.

 

[canuckv8u]

if cutting the weight of the wheels had a material impact on fuel economy, Hyundai would have already done that, particularly with the 5.0.

Per Scott's comments above, there would be benefits, but not enough to justify the cost differential.

 

[forzza1]

I agree the gains are not as noticeable as in lighter cars. Our cars are too fat for this and to compound to this problem, lighter wheels will bend very easy...
Interesting though this copy and paste from another forum. ...FYI
"*Wheels are rotating mass/unsprung weight. Every 1 lb reduction in rotating mass is equivalent to an approximately 8 lb reduction in static weight. With lighter weight wheels, you will benefit from increased fuel savings, quicker braking, improved tire wear and better acceleration. Always ask about the weight of wheels. Your vehicle is not engineered for heavy wheels. Therefore, it will not perform well if you effectively put four anchors on it! "

 

[tmf2004]

going to a 18'' wheel/tire package would help more i think then staying with 19's...the fronts need be high disk to clear the BBK... I would like some lighter wheels in the future myself.. i'm guessing these are pretty heavy at probably around 30-35lb per wheel.. then you add the tire and air and who knows what it will be..

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[Crowley]

I'd be more interested in knowing as if I wanted to go with a larger width aftermarket wheel but keep a similar weight as to not add any more additional weight to the car. I think something with say 265s or 275s up front and 305s to 315s out back would look sweet

Crowley

 

[Huddleston]

I'd be more interested in knowing as if I wanted to go with a larger width aftermarket wheel but keep a similar weight as to not add any more additional weight to the car. I think something with say 265s or 275s up front and 305s to 315s out back would look sweet

Crowley

you cant run 265s up front and anything over 295s on the rear would cause rubbing without heavily adjusting the offsets.

my wheels are 20x9 and 20x10.5 respectively and lighter than the stock wheels.

I have 235s and 285s.

 

[BillZ]

It's my understanding that reducing wheel weight is geared more toward ride and handling than mileage. See https://en.wikipedia.org/wiki/Unsprung_mass.

 

[Seejay]

In all likelihood, anything you change on a Genesis suspension will result in a decline of ride or performance or both. Hyundai paid a boat load of money for Lotus to tweak the suspension of these cars. Suspension kinematics are voodoo engineering in the automotive world. The more expensive and exotic the car is, the more damage you will do changing _ANYTHING_. If you do it for the looks, that's one thing, but if the car has been reasonably well engineered, after market changes will just undo performance, ride, noise, etc.