I am planning to upgrade my 2010 base to Wilwood Aero 6 front calipers. I am trying to figure out if I need spacers to provide clearance for the calipers and if so, how thick.

At the same time I am going to buy Toyo R888R's and would like to run 275's if they will fit. The base wheels are only 8.5" wide so I got some OE wheels brand Z06 knock-offs that are 9.5" wide. They match the Speedline Z06 12" wheels in the rear. I had the quarter panels changed to a pair from a Z06 so I could run 345's on the rear.

Wilwood says the Aero 6 calipers require just over 2" from the face of the brake rotor to the inside of the 'spokes' of the wheels.

I have J55 brakes with 330 mm front rotors which I plan to keep as long as these (DBA 5000 T3) rotors last and would probably upgrade to 355 mm's when they need to be replaced.

I guess I could buy the Aeros 6's, mount them, and slide the new wheels on to see if I need spacers and if so, how wide. This still doesn't address clearance for the tires. I guess the calipers will ultimately determine what tires I can run. GS fender upgrade? Would sure make things easier.

I am usually good at visualizing stuff spacially but I haven't quite figured this one out yet. Any ideas?

The dims on the OE Wheels are;

Rim Diameter 18
Rim Width 9.5
OFFSET: +56.0
BOLT PATTERN: 5x120.65

Thanks!

 

Keep in mind if you change the front fenders you have to change the bumper too.

 

Changing the calipers won't have any effect on the wheel or tire clearance to anything. Same stock spec rotor: same placement of both the wheel and tire. But.

The body of the caliper is "wider" than the stock caliper to clearance to the back of the spoke may be compromised. ONLY IF you add a wheel spacer will that change body or fender clearance.

 

Perhaps you misread the question. How do I determine if the new wheels will clear the Wilwood calipers or, if spacers are needed, what thickness?

"Figuring out clearance for Wilwood Aero 6 front calipers"

 

Try this website https://www.wheel-size.com/calc/?whe...cl=30mm&sr=0mm

If you put in the specs of your current wheels it may give you some idea of whether the wider calipers clear.

 

There's more to it than caliper clearance to the back side of the spokes....

 

Thank you @Corvette_Dez




That is the only part I am missing. I have the rest of the caliper clearance figured out.

 

All caliper kits from brake suppliers offer wheel clearance data. In the case of the Aeor6 front Caliper Kit: THIS

You can:
1. Share that data with your wheel supplier- if not purchased
2. "Reverse" measure the inside of the wheel yourself- if purchased and in hand.
3. Compare the 1.57" number to you car now- as I stated above "its the SAME rotor" so sticking a steel ruler in the spokes and against the disc at the outer most edge is rather simple. *Assuming you have the wheels now.

 

Thanks @Todd TCE

Yes, I will be continuing ot use the same rotors.

To what does 1.57" apply?

 

The required clearance needed as shown in that drawing link.