Lightweight 19" vs OEM 18" vs OEM 17"
#16
Join Date: Jul 2005
Location: Torrance, California
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From what I remember, the closer the mass is to the center, the easier it is to turn/spin. So, do this little trick: Sit in a chair and spin yourself around. Now, while you are spinning around, out stretch your arms and you’ll noticed yourself spinning slower. While you are still spinning, move your arms back towards the body and you notice yourself spinning faster again. So, for a given diameter, if the 17’s, 18’s, and 19’s are the same diameter (I’m guessing the tires are making up the additional inches from the smaller diameter), it will all depend on how heavy the rims and tire combo is towards the outer edge. I don’t know how much of a weight difference there is from the 19’s vs. 18’s vs. 17’s at the outer edge (or once the edge starts) and how much of the weight is towards the inner hub/spokes. If the 17’s and 18’s are heavier from not being forged and using heavier alloys, then from the naked eye, the 17’s and 18’s have most of that extra weight closer to the center. So, in theory, they should spin faster with less torque required then that of the 19’s.
Oh, I forgot to mentioned that with the OEM 19’s, the width is larger so there is more contact to the ground, which will require more torque to spin too. Now, the extra contact to the pavement provides more traction, so there is more then just weight to consider when we are talking about performance.
Oh, I forgot to mentioned that with the OEM 19’s, the width is larger so there is more contact to the ground, which will require more torque to spin too. Now, the extra contact to the pavement provides more traction, so there is more then just weight to consider when we are talking about performance.
Last edited by mephistomyhero; 01-19-2007 at 03:17 PM.
#17
you have to hold another variable constant, the weight of the entire combo, if you really want to know which wheel size is best, the wheel and tire combos have to be the same and just changing the wheel diameter. I'd bet the OEM 19 combo accelerates quicker than the OEM 18" combo because overall it weighs less so the even though more mass is located further from the axis of rotation, the weight savings counteracts this
#19
Red Card Crew
iTrader: (24)
The thing is the 18" coupe wheels + the oem michelins are only a tad heavier than the 19" coupe wheels + the oem Bridgestone RE050s. The re050s are heavy *****. But the 19s themselves are quite a bit lighter than the 18s
Originally Posted by redlude97
you have to hold another variable constant, the weight of the entire combo, if you really want to know which wheel size is best, the wheel and tire combos have to be the same and just changing the wheel diameter. I'd bet the OEM 19 combo accelerates quicker than the OEM 18" combo because overall it weighs less so the even though more mass is located further from the axis of rotation, the weight savings counteracts this
#20
#23
#25
Originally Posted by Jeff92se
And YOU know this based on what information????????
-sean
#26
Red Card Crew
iTrader: (24)
Optimum performance for what? Drag? Track? Wet? Dry? What oem 18s??? coupe 18s? You DO know these weigh about 123 gazillion lbs each right? Since when is "ride" and "quiet" part of the "optimum performance" consideration?
You won't get into it because you really have no idea what you are talking about.
You won't get into it because you really have no idea what you are talking about.
Originally Posted by Nismo G
As far as having optimum performance with optimum comfort the OEM 18s are going to be better of all the OEM wheels. Sidewall is thick enough where it doesnt take away from the ride and it is still quiet. Its just obvious im not getting into it on this haha
-sean
-sean
#27
Originally Posted by Jeff92se
Optimum performance for what? Drag? Track? Wet? Dry? What oem 18s??? coupe 18s? You DO know these weigh about 123 gazillion lbs each right? Since when is "ride" and "quiet" part of the "optimum performance" consideration?
You won't get into it because you really have no idea what you are talking about.
You won't get into it because you really have no idea what you are talking about.
-sean
#28
Originally Posted by Jeff92se
Optimum performance for what? Drag? Track? Wet? Dry? What oem 18s??? coupe 18s? You DO know these weigh about 123 gazillion lbs each right? Since when is "ride" and "quiet" part of the "optimum performance" consideration?
You won't get into it because you really have no idea what you are talking about.
You won't get into it because you really have no idea what you are talking about.
-sean
#29
[QUOTE=mephistomyhero]From what I remember, the closer the mass is to the center, the easier it is to turn/spin. So, do this little trick: Sit in a chair and spin yourself around. Now, while you are spinning around, out stretch your arms and you’ll noticed yourself spinning slower. While you are still spinning, move your arms back towards the body and you notice yourself spinning faster again. So, for a given diameter, if the 17’s, 18’s, and 19’s are the same diameter (I’m guessing the tires are making up the additional inches from the smaller diameter), it will all depend on how heavy the rims and tire combo is towards the outer edge. I don’t know how much of a weight difference there is from the 19’s vs. 18’s vs. 17’s at the outer edge (or once the edge starts) and how much of the weight is towards the inner hub/spokes. If the 17’s and 18’s are heavier from not being forged and using heavier alloys, then from the naked eye, the 17’s and 18’s have most of that extra weight closer to the center. So, in theory, they should spin faster with less torque required then that of the 19’s.
Oh, I forgot to mentioned that with the OEM 19’s, the width is larger so there is more contact to the ground, which will require more torque to spin too. Now, the extra contact to the pavement provides more traction, so there is more then just weight to consider when we are talking about performance.[/QUOTE]
i disagree with that last statement.
Skinnier tires actually go through snow better than fatter tires, so traction is a moot point there. You are not entirely correct, Sir.
Oh, I forgot to mentioned that with the OEM 19’s, the width is larger so there is more contact to the ground, which will require more torque to spin too. Now, the extra contact to the pavement provides more traction, so there is more then just weight to consider when we are talking about performance.[/QUOTE]
i disagree with that last statement.
Skinnier tires actually go through snow better than fatter tires, so traction is a moot point there. You are not entirely correct, Sir.
#30
Red Card Crew
iTrader: (24)
Easy. They DON'T. But then again, that's FAR from my point. I never said or implied they were worse. But you did specificly say they were BEST. It's on you to state why that is.
Originally Posted by Nismo G
Since i dont know dick about the tires, considering im doing an science experiment on them why dont you tell me what makes the OEM 18" rims so much wrose than the OEM 17" rims and OEM 19" rims????
-sean
-sean