Aren't these 20" and steel?

Must weigh a fair chunk.

 

Are these the exact same wheels the Vulkan Automotive sells?

 

https://www.wheellab.us/rotiform-stl...-r19120902161/

Pretty sure they are forged aluminum, but let's be honest it's a big wheel so it has some weight. Then again so did the stockies.

Looks like the center cap area is a bit different

 

Forged? For real? Our GT4s didn’t even come on forged alloys (they’re cast.) Which is not to say the Rotiforms aren’t forged — I don’t know anything about them. But five of them are going to be $8-10,000 if they are, I bet. And 20” forged wheel should way around 20# or less in our widths.

 

Cast monoblock
​​​​​​https://www.rotiform.com/wheel/65233.../?styleID=4200

 

There is a forged STL from Rotiform staring at $1500. Each. Assuming most sets you see are going to be the cast aluminum version. 37 pounds for 20' x 9' in case anyone is curious. So probably not far off from what the stockers weigh. They are not exactly light.

 

Greetings,

Question, the center bore of the Roitform STL is 72.5 mm, the L663 center bore I believe is 72.6 mm. Was there any issue with this difference? Thanks

 

Nope all good

 

I have the 18” version of this wheel and I have had a slight issue with the center bore of the wheel being slightly smaller than the L663 hub. I don’t think the 0.1mm would cause the issue and I’ve measured the center bore of the wheel, which is true to mfg spec. Saying that, I may need to increase the center bore ever so slightly after I get the brakes sorted to get everything fitted.

 

@gtbeale just bought the same set and planning to mount them on KO3 now that sizes become available. Do you recall the lug bolt size was by any chance?
I’m assuming that the stock ones won’t work. Thanks in advance