Enkei RP03

18x8@20.2 lbs vs 18x9@18.3 lbs

 

I don't think that's a hard decision. The 18 x 9's are lighter and wider, which are both great for people who like to track. Also, it would look better.

 

Go wider- makes for a more aggressive look

 

Is that right? I mean, 18x8, the smaller size, is actually heavier then the wider 18x9?

 

yup, the wider one is actually lighter... weird huh.

 

9...

 

i would do more research.

and figure out how more is less.

beers

 

/\hard to argue that.

 

You have to get the 18x9, there's no question about it. 18x8 is totally pointless and is a flatter face to boot. In fact the optimal setup would be the 18x9.5 +38 imho. i just did an 8 with that setup and 275/35 all around.

The wider one can often be lighter. A lot has to do with the amount of material is used to produce the back pad. Wheels with HI Disk and LO Disk are an example of this weight difference. you see this a lot in Multipiece wheels for big brake kit clearance. Most consumers don't realize this but most one piece wheels that have staggered fitments also have this "hi" pad and "lo" pad built into their offsets per say.

ergo: An RP03 18x9 +40 is going to be lighter than 18x9 +18. Same width just different offset. With the 18x8, it's a flatter face making for a thicker back pad. The 18x9 being more concave allows for a thinner backpad thereby reducing the weight. The additional material required to make the rim wider is negligible in comparison to the weight consumed by the spoke architecture and back pad of the wheel.

Rishie

 

there you go,

google came to you!

but the real answer depends on what you are going to do with it. and how much talent you have.

beers

 

Ty Endless Rotaries for the detailed reply and swoope for the stuff that he does best.

 

Wow, so the wider the rim, the lighter it is in some cases huh? Mind=blown lol.

Not to thread jack here...

but from what I can see, you'll get a more contact with the road, so more grip, which is great. Albeit wouldn't having a wider tire more then make up the difference in weight?

Also, how would 18x8.5 38os be for track use? I would think that because it sticks out a bit more, it would somehow add more unsprung weight. I'm still researching this myself, so I figured I'll ask here anyways lol.

 

Damn...close the thread! You got your answer.

 

FYI... The 18x9 +40 RP03 is actually 19.95 lbs. That said, they do look great.

https://www.rx8club.com/showpost.php...&postcount=625

 

18x9.5 +38 RP03

Go big or go home.

 

^+1

 

Just thought I should post the specs for those interested.

Sorry to resurrect this dead thread.

 

Dead thread = 10 days old? Hmm...

Anyways, that's nice that the manufacturer lists the weight, but I'd rather trust a forum member who weighed the wheel in person.

 

I'll probably be getting these wheels (18x9.5 38) in a few paychecks, I'll measure them then.

-Vesper

 

That would be nice, I myself am waiting for a quote from local supplier and wanna be sure i'm getting the lightest one i can.

 

I'lll post weights when I get them. As I said though, it'll probably be a month or so until I order them, then however long it takes to get them.