Yes I have read that Forged is lighter and stronger than cast, but that's not the question I have. It's sort of a random question that is probably hard to answer and trust me I have contacted the guy I want to buy the rim from and he hasn't answered back yet so I will give my go here. I need 2 lightweight wide rear rims for drag racing and track racing (the season is starting). I'm interested in these 2 wheels pictured below. The silver rim is FFT forged wheels and weight only 21lbs at 18x11 (forged) and the silver rims are 18x9.5 cast aluminum. Do you think the white rims being 1.5" smaller in width should be about the same weight as the 11" forged regardless that it's cast aluminum?



18x11 Forged 200$ more for the pair





18x9.5 cast aluminum 200$ cheaper and cheaper tires.

 

I'm on mobile and don't have the bookmark at hand, but I found a spreadsheet online that lists rim weights for aftermarket wheels. It struck me as mighty comprehensive; I expect you can find your answer there if you can find it.

 

The FFT wheels aren't forged
I believe it stands for flow formed technology They aren't say gravity cast but they aren't a te37 type forged either. They utilize a type of casting that creates a much stronger wheel
SSR and I believe Advan create their wheels this way -I'd assume a bunch of others do also
But to answer your question I would assume both wheels mentioned are pretty close in weight

 

I wouldn't consider 9.5 wide...especially over an 11

 

This isn't where I downloaded my spreadsheet (site domain registration expired), but here's a couple links to info:

http://www.scribd.com/doc/24224938/Rim-Weight

https://docs.google.com/spreadsheets...=2&pli=1#gid=0

 

Well I would be running probably 275/40/18 tires. If i ran a 11" i would need atleast 295 width and the prices in tires from those two is about 200 plus $ more than the 275's. Also i would only be running around 290-300 whp. There is no need for that wide of rim (11") if your not atleast 400whp +. I am upgrading my drivetrain with a quaife differentail and a lightweight driveshaft so i should get more power to the wheels easier.

 

Says who...?

 

Says me... because 275 width rubber on a 9.5" rim is sufficient enough for good grip at that horsepower level. Running a 11" wide rim and bigger tire just adds more weight/mass and would put more stress on the drivetrain probably resulting in slower times. Remeber the bigger the tire the more weight and tires usually weight more than the rim when they are 295 width and the rim is forged. You dont have to agree with me, but i dont see the reason to have 11" wide rims when your not around 400 whp atleast. I might get the 11's though because i will add more hp and tq through the years as i go.

 

He is talking about performance setups, not "stance".

 

For drag racing (if it's strictly for that anyhow), you would actually be better off going with a 16" wheel with a tire that has a similar rolling diameter to a 265/35-18. You want a bigger si6ewall with a small rolling diameter to improve acceleration thru gearing while still having a wide stance.

If it's also a DD tho, that's different.

 

I would agree. If this is strictly a drag setup, an 18" rim is a terrible choice. Sidewall flex will be limited and you will have issues hooking up off the line.

A 16" drag rim would be an better option. more sidewall flex for grip off the line, not to mention smaller diameter take less HP to turn due to the brunt of the wheels mass (the rim) being closer to the center of rotation.