David Mayhew’s 1970 Chevelle on Rocket Attack 18x10 – 5.00” bs

[RocketRacingWheels]

David Mayhew’s 1970 Chevelle on Rocket Attack 18x10 – 5.00” bs

The Rolling Stock
• Tires: Toyo Proxes 305/35ZR18
• Series: Track & Touring
• Style: Attack
• Construction: Semi-Forged
• Finish: Hyper Shot
• Size: 18x10 5.00”backspacing
.
Rocket Racing Wheels: Driving innovation, style and quality at a price you can afford! Rocket Attack Wheel prices below Chevelle pics.





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[STREETFIGHTER50]

That looks awesome! Hella meaty! Wish I could fit 305s on my Lark lol

[andrewb70]

Looks fantastic!

Andrew

[STREETFIGHTER50]

What size are the fronts?

[andrewb70]

What size are the fronts?

It looks like a square setup.

Andrew

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What size are the fronts?

Rock those wheels on your Buick!

[STREETFIGHTER50]

Doesn’t it look like the rears have a deeper dish?

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The inner lip on the rear is definitely deeper.

[andrewb70]

Doesn’t it look like the rears have a deeper dish?

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The inner lip on the rear is definitely deeper.

Yes...sure looks that way. Maybe the back spacing is different?

[KCR]

I got to go for a ride in this car last week and all I can say is Bad Ass. This car handles so good with the wheel and tire combo.

[RocketRacingWheels]

What size are the fronts?

18x10 with 5.00" backspacing

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I got to go for a ride in this car last week and all I can say is Bad Ass. This car handles so good with the wheel and tire combo.

Cool.

[RocketRacingWheels]

Yes...sure looks that way. Maybe the back spacing is different?

I connected with him on Instagram. I'm not sure if he's on PT or not? If you want to reach out and confirm, his Instagram is dmayhew26

Thanks

[STREETFIGHTER50]

It looks like a square setup.

Andrew

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Rock those wheels on your Buick!

Damnit! I can’t decide on these or the Weld S77’s lol!

[STREETFIGHTER50]

Also wondering if I can go 18x9 up front

[andrewb70]

Also wondering if I can go 18x9 up front

Yes

[STREETFIGHTER50]

What’s the usual BS on 18x9” fronts on the 68-69’s? Current set US Mags 18x8” are 4.50 BS with 245/45. Seems like I have some room in there. I would like to go 18x9” with 255/45.

https://static1.pt-content.com/images/pt/2019/08/Ez7N3k-1.jpg
https://static1.pt-content.com/images/pt/2019/08/eEjN4V-1.jpg
https://static1.pt-content.com/images/pt/2019/08/pZuQqu-1.jpg

[Dmayhew26]

The wheels I used are 18x10 with 5.5” and 6” Bs. 305’s all the way around. No tubs in the rear but rear End is squared up good in the body and no rubs at all but close inside and out. Front had to do some inner fender well work but besides that it clears everything else no problem. None of the suspension is stock though and also using a ford 9” rear End. Each application will be different but this works perfect for this car. Super happy so far with the rocket wheels, I’ve been beating them up and they have been great!

[STREETFIGHTER50]

The wheels I used are 18x10 with 5.5” and 6” Bs. 305’s all the way around. No tubs in the rear but rear End is squared up good in the body and no rubs at all but close inside and out. Front had to do some inner fender well work but besides that it clears everything else no problem. None of the suspension is stock though and also using a ford 9” rear End. Each application will be different but this works perfect for this car. Super happy so far with the rocket wheels, I’ve been beating them up and they have been great!

Oh ok, I knew something had to be different. The rears have a deeper inner lip... Man them steam rollin 305’s look so sick under there! Too bad my years can’t fit those without major surgery lol! I’ll be getting a set really soon. I’ve always liked the Weld S77’s, but the thought of maintaining their polish and higher price is swaying me towards the Rockets now. Just gotta figure out the exact sizes I need without any rubbing and which color. Hyper Shot and Titanium both look nice.

[RocketRacingWheels]

Thanks. Let us know if you have any questions.

[USAZR1]

The wheels I used are 18x10 with 5.5” and 6” Bs. 305’s all the way around. No tubs in the rear but rear End is squared up good in the body and no rubs at all but close inside and out. Front had to do some inner fender well work but besides that it clears everything else no problem. None of the suspension is stock though and also using a ford 9” rear End. Each application will be different but this works perfect for this car. Super happy so far with the rocket wheels, I’ve been beating them up and they have been great!

Looks like you're running quite a bit of negative camber, David. That helps keep the tires off the outer fender lips. I doubt that front wheel & tire combo would even come close to fitting my 70 A-body, without lots of mods.
An 18x10 with 5.0" backspace (-12 offset) and 305 tire? Not a chance.

David, is your car primarily set up for autocross/track use?

[adeeos]

For a car that doesn't have frame or body modifications, a great looking combination is 295/40-18 in the rear and 255/40-18 in the front. The rear is a hair over 27" and the front is right at 26" tall. Falken 615s are available in that size and are excellent tires.

Andrew


Andrew-would these sizes fit with no mods on a 1970 GTO as well? Also I have factory disc brakes on mine, what front and rear aftermarket brake kits would you suggest for this car without breaking the bank?

Thanks Sam

[andrewb70]

For a car that doesn't have frame or body modifications, a great looking combination is 295/40-18 in the rear and 255/40-18 in the front. The rear is a hair over 27" and the front is right at 26" tall. Falken 615s are available in that size and are excellent tires.

Andrew


Andrew-would these sizes fit with no mods on a 1970 GTO as well? Also I have factory disc brakes on mine, what front and rear aftermarket brake kits would you suggest for this car without breaking the bank?

Thanks Sam

Sam,

The tire combination that I mentioned was in fact on my 70 GTO.

There are many great brake systems out there. I have c6z06 brakes on mine now (make sure the wheels you have will clear). I have a Baer SS+4 kit on the Cougar. Both work well for what I do with the cars.

Andrew

[adeeos]

Thank you!!

[STREETFIGHTER50]

My current set up front 18x8 4.50” BS and 245/45 tire is pretty close to the outer/center fender/wheel tub screw. Would I be good with an 18x9 5.50” BS with a shorter 255/40 tire?

https://static1.pt-content.com/images/pt/2019/08/mJDmlF-1.jpg

https://static1.pt-content.com/images/pt/2019/08/Lhk6Q3-1.jpg

https://static1.pt-content.com/images/pt/2019/08/WDYjPI-1.jpg

[68Formula]

My current set up front 18x8 4.50” BS and 245/45 tire is pretty close to the outer/center fender/wheel tub screw. Would I be good with an 18x9 5.50” BS with a shorter 255/40 tire?

https://static1.pt-content.com/images/pt/2019/08/WDYjPI-1.jpg

Doesn't look too bad. For peace of mind, you could remove that one bolt that's close to the tire (the others are more than enough).

The equivalent of your current wheel setup in a 9" would be 5" backspace. The section width difference with the 245/45 measured on an 8" compared to a 255/50 measured on a 9" wide rim is 0.6". Which means without changing the backspace you'll be 0.3" closer to the fender. So you'll want at least .25" more backspacing to keep it about the same. But then you need to check if you can tolerate more backspace and tire width on the inside, as that will put you closer there by 0.25+0.3=0.55". Or with the 5.5" backspace, a total of .8" closer on the inside.

To figure out available backspace, you'll need to rotate the wheels in both direction and try to figure out how much clearance is there with the existing setup. Maybe get some wheel skates to give it a little lift and be able to rotate the tires easier. Once you drop it back down, bounce on it to get it to settle to ride height.

Don't forget, some of it will depend on your camber gain. If the camber gain geometry has been corrected, the wheel tilts in under bump, and your clearance to the fender lip will improve. But if the geometry is stock, it'll camber out under bump, and the tire will get closer. Since it looks like your setup has Ridetech suspension, I would think it all that has been addressed. But you might want to check that first before spending coin on wheels and tires, as that plays a more important role than wider wheels and tires.

[Dmayhew26]

Looks like you're running quite a bit of negative camber, David. That helps keep the tires off the outer fender lips. I doubt that front wheel & tire combo would even come close to fitting my 70 A-body, without lots of mods.
An 18x10 with 5.0" backspace (-12 offset) and 305 tire? Not a chance.

David, is your car primarily set up for autocross/track use?

Yeah, I built the car to handle well but also drive it 2-3 times a week normally. There is a lot of clearance on the outer wheel wells in the front for sure with camber I run. The only issue is the sway bar on the inside but with the 3 piece bar setup I have its not a problem, I could see with a normal sway bar setup it’d be close or hitting for sure with the 305’s. My fronts are 6” offset and rears are 5.5” off. I aired on the side of caution and went 1/2” more offset than I thought I was going to need and glad I did. You can always add wheels spacers if your to narrow.

[68Formula]

My fronts are 6” offset and rears are 5.5” off. I aired on the side of caution and went 1/2” more offset than I thought I was going to need and glad I did. You can always add wheels spacers if your to narrow.

Given the owner has clarified the offsets, can the OP rename the thread so there's no confusion?

[cparsons]

Sam,

The tire combination that I mentioned was in fact on my 70 GTO.

There are many great brake systems out there. I have c6z06 brakes on mine now (make sure the wheels you have will clear). I have a Baer SS+4 kit on the Cougar. Both work well for what I do with the cars.

Andrew

Andrew,
What wheels do you have on your car? I'm wanting to put a Kore3 setup with C6 Z06 brakes on my 1970 Chevelle and I have Rocket Racing Attack wheels 18x9 in the front and 18x11 in the rear.