Those have a 51mm offset.

 

Ok...

Your ad (Tirerack) in the June issue of SCC has a blue Subaru, with the Brembo brake kit, wearing SSR 18x8 competitions....

If these wheels have a 51mm offset (which I have learned is ideal), why do they fit one suby with Brembos, and not another?

 

The Comps clear Brembo GT kit we sell for the WRX. The Subaru brakes are indeed different. It's the "Subaru-Brembo" kit - with different dimensions than the GT.

 

That doesn't really seem to make all that much sense to me... obviously Brembo spends a great deal of time and resources engineering brake systems, so why have 2 separate systems for the same car? Not really cost effective... I will enquire further.

 

Ok...

I just spoke with an engineer at Brembo, and he informed me that the GT kit((for the WRX), and the STI stock calipers have the same dimensions, thus, wheels that fit the WRX GT Brembo kit will also fit the WRX-STI.

I am now thinking about a set of SSR's...

 

Ok here is the deal. Most Brembo guys here in the US do not know that there is a difference and yes it is even their own products. I know I know. There is a difference between The gold Brembos and the GT kit. The Brembos that are on the STi are the same ones used on the G35, 350z Track Edition, Skyline R34, and some other cars.

 

What are you talking about here? I called, and spoke with, an engineer, someone who was very knowledgeable about the products.

Before I did this, I was already suspect that it was the same due to the fact that big changes (i.e. unsprung weight, suspension geometry) in these aspects of handling could very well have an adverse affect on vehicle handling and stability.

It is not cost effective to implement inter-vehicle changes, especially when basic geometry is the same with both vehicles. Brembo products are mass produced. They are also sized (piston diameter) to the weight of the vehicle, the master cylinder and front rear bias.

I happen to know about this stuff for 2 reasons: 1) I have designed and built my own brake kits, and 2) I run a consulting engineering firm.

Even though there is no direct part number (yet) to cross reference the 2 piece rotor of the GT kit with the STI, Brembo assured me that they were working on a direct crossover, as well as a 14" upgrade.

Although the color (gold) may be similar to other vehicles, it is not indicative that they are the same caliper with the same piston sizes. For instance, a Skyline is a very heavy car. Therfore, it is logical to assume (for the purposes of this post) that the piston sizes are bigger than those in the 350z, which is a lighter car.

Balance in the Brembo aftermarket kits, as well as other kits, are a result of proportioning the correct amounts of fluid to both the front and rear calipers. Some people do this better than others. Stoptech, for example, spends a great deal of time sizing pistons so that when you increase the volume of fluid you have to move (with front only kits) you still retain good pedal feel, and excellent control, while still operating within the parameters of the stock master cylinder and stock rear brakes.

But I digress. The object of this post is to determine what wheels will fit under the STI brakes. Assuming the information I was given is correct (which I have no reason to doubt) any wheel that fits under the GT kit, will fit stock STI's. To further this point, I spoke with a fellow at Prodrive who informed me that the GC series wheels, with 10mm less offset, would also clear the calipers.

I think that both of these sources are somewhat reliable. Should anyone else wish to question that, I would suggest that you investigate for yourselves rather than spread conjecture around with no facts to back it up.

I am new to this borad, but I am also involved in a Honda board. One of the most disturbing things I have found in my days on these boards is people taking erroneous information as fact, or coming across as they are more knowledgable than others. This does nothing but degrade the integrity of said board, thereby steering people away who would otherwise share useful knowledge here.

 

Sti caliper extension: 35.4mm
Brembo GT w/328mm rotor (p/n 1A1.6010, the one in the ad): 23mm
Brembo GT w/332mm rotor (p/n 1B2.7008): 34.3mm

The Brembo 332 has the same wheel options as the STi, while the Brembo 328 (again, pictured in the ad) has about 18 wheels to fit.

The 332 is a special order, and the 328 is what we sell regularly.

 

Then, what are the wheel options for the 332?

 

ASA KA3 and SSR GT7 (still waiting for pic on this one).

 

I have posted a few pics of the PRE-PRODUCTION version of the SSR GT7 here for your perusal. Notice the extreme caliper clearance. The GT7 will be available in silver w/ machined lip and light grey w/ machined lip. Also for Subaru and Lancer there will be gold w/ machined lp available.

 

17x7.5 offset 50mm $349 roughly 16lbs.
18x8 offset 51mm $428 roughly 17lbs.