CT5-V Blackwing wheel specs?

[Cbrcr99]

This is what was packaged on my aftermarket lug nuts

 

[jwolf99]

My dealer gave me the box from the black lug nuts that I included in my original build. P/N is 84448918 which all seem to come back as 14 x 1.5 on a google hits. Also, I found this thread on the one of C8 forums which indicates that these will fit the C8 vettes and C6 Camaros as well.

Wheel center hub measurement - CorvetteForum - Chevrolet Corvette Forum Discussion

C8 General Discussion - Wheel center hub measurement - Some of you guys may have your extra wheels. Does anyone know the measurement for the center hub register?

www.corvetteforum.com

 

[marfan]

I don’t have my C8 any more to check but I wonder if the C8 studs are the same diameter. I know both use a larger 21mm socket to remove the lug nuts whereas the C7 and prior were 19mm.

I don't have one on hand, but the CT5 seems to need a 22mm socket for the lug nuts? 21mm is too small and 7/8 seems ever so slightly loose - can anyone confirm?

 

[Caddyjack117]

5 x 120 mm. is correct for the CT4-V Blackwing, and ATS-V front wheels will fit. However, the rears need to be different, since the Blackwing brake calipers are larger.

This is not true. I’m guessing maybe your ATS was a coupe? The ATS coupe and sedan had different offsets. The wheels on the ATS and CT4 sedans are apples to apples. Wasted a good track day on factory tires because of this post

 

[WONT TAP]

This is not true. I’m guessing maybe your ATS was a coupe? The ATS coupe and sedan had different offsets. The wheels on the ATS and CT4 sedans are apples to apples. Wasted a good track day on factory tires because of this post

You're correct that ATS-Vs used different offset rear wheels for the coupes and sedans. However, CT4-V Blackwing rear brakes are absolutely larger than those on ATS-Vs and most aftermarket ATS-V rear wheels will not clear the calipers.

My comment above was intended to be helpful for those attempting to install aftermarket wheels on their CT4-V Blackwings. I apologize if you used the information I provided and 'wasted a track day'.

 

[NightBlueTTS]

Has anyone determined the part numbers for the 5BW tech bronze wheels?

thanks

 

[MatthewAMEL]

Has anyone determined the part numbers for the 5BW tech bronze wheels?

thanks

Have you called a Dealer parts department to ask? They should be able to look it up.

 

[NightBlueTTS]

Have you called a Dealer parts department to ask? They should be able to look it up.

No I haven’t, that’s why I was asking.

 

[poor-sha]

They were posted somewhere on this forum but I don’t have them handy.

 

[NightBlueTTS]

They were posted somewhere on this forum but I don’t have them handy.

I was only able to find the ones for the 4BW

Online I found these for the 5BW, but would be nice to double check:
Bronze wheels:
F - 85155514
R - 85155515

 

[MatthewAMEL]

And just to be clear, the bronze wheels are NOT the promised Magnesium wheel, right? In the original story, the Mg wheels were Bronze.

 

[RDATLTE]

And just to be clear, the bronze wheels are NOT the promised Magnesium wheel, right? In the original story, the Mg wheels were Bronze.

Correct, the Mg wheels have yet to materialize.

 

[sleepys4]

If anybody wanted to know the front wheels and tires weigh 56.6 and the rear 56.2.

 

[DustinEarnhardt]

If anybody wanted to know the front wheels and tires weigh 56.6 and the rear 56.2.

That seems... Implausible. No offense, but the rears are significantly larger. How can they be 0.4lbs lighter?

 

[MatthewAMEL]

If anybody wanted to know the front wheels and tires weigh 56.6 and the rear 56.2.

How does a 11” wide wheel with a 305 tire weigh less than a 10” wheel with a 275 tire?

 

[RDATLTE]

That seems... Implausible. No offense, but the rears are significantly larger. How can they be 0.4lbs lighter?

It could be due to the difference in the thickness of the wheels where they mate to the hubs.

 

[white98ls]

How does a 11” wide wheel with a 305 tire weigh less than a 10” wheel with a 275 tire?

Also, which stock wheels are we talking about here?

 

[sleepys4]

Generally don’t go back and forth but I had time today.

Rears

Fronts

6/32-7/32s.

Hope this helps.

 

[Neveready]

Generally don’t go back and forth but I had time today.
View attachment 17303
Rears View attachment 17304
View attachment 17306
Fronts

6/32-7/32s.

Hope this helps.

That is very helpful!

The oe tire sizes off tirerack with 9/32 when new weight 28 lbs for 275 front and 30lbs 305 rear.

Bathroom scales aren't always the most accurate but you get the idea.

 

[sleepys4]

That is very helpful!

The oe tire sizes off tirerack with 9/32 when new weight 28 lbs for 275 front and 30lbs 305 rear.

Bathroom scales aren't always the most accurate but you get the idea.

I generally keep my car at a warehouse storage. They have doctors office scale, not sure how accurate those are but they weighed within .2 lbs.

I’m assuming the rears are just lighter wheels, less materials. I also assume tire rack has those weights incorrect. I know 5mm sidewall difference makes a difference for sure.