jpgunn

I am in the market for SCCA Street class legal wheels (that clear PCCBs) as well:
19" X 8.5" front wheels (up to 6mm less Offset would be OK)
19" X 11" rear wheels (up to 6mm less Offset would be OK, but might get tight on fitment with fender)

I have seen 19" BBS, and HRE wheels clear the PCCBs. Does anyone know if the 19" X 11" rears clear with no changes to Toe Links?

HRE_Jurrian

The fitments we've done on GT4's so far have been 20", but I can have the fitment verified to see what we can do with a 19x11 on the rear for you if you're interested. I'll get the ball rolling, but if you want to get in touch, just send me a PM and I can follow up once I have it verified.

acropora157

Thank you for posting the above chart. I was doing the math on some tire choices before you posted the chart and boy that chart made it allot easier. However, I want to point out that in the R7 tire columns there is an error. The rear tires all have the same height with different tires. The first R7 column has the rear tire at 315/30-19 with a 26.1" height and the second R7 Column has a 295-30-19 Rear at 26.1 on the same size wheels. The 315/30-19 Rear in the first R7 column actually has a height of 26.44 , which deviates from the front to rear aspect ratio of the stock tire and wheel combo. The 295/30-19 R in the second R7 column has a height of 25.97 vs its front 25.5" height(235/35-19), the closest to stock aspect ratio. So a good choice, if no adjustments are to be made to the suspension, is 235/35-19 Front and 295/30-19 rear. I did see that you mentioned changing the suspension height to better suit the wider front tire for the third R7 column choice.

ShakeNBake

Interesting. I took these directly from Hoosier's website. That is the mounted diameter they published for both sizes. I checked with tire rack - same deal. Both 26.1. It's probably wrong, I will contact them.

FYI - All the other specs in the table are from the manufacturer - not calculated from the labeled sizes.

UPDATE: I spoke with Hooiser today, they said the sizes are correct. 26.1 on both the 295 (mounted on 10" rim) and 315 (mounted on 11" rim).

electron mike

Interested in your thoughts once you get on track, and pics!

Where did Soulspeed move to? I used them years ago when they were off Burnet, but I thought they went out of business?

acropora157

OK TY. That explains why the the same height is listed for different sized tires, they are on different width wheels. It would be helpful if the wheel width was added in the left margin.

krell

It's entirely possible the GT4 Clubsport wheels will be available in 2016 from the Porsche Motorsport catalog. Obviously pricing is another issue, but I would expect them to be in line with what BBS's wheels run on their website.

Pretty sure these wheels are 18", which would be cool because tires would be a bit cheaper, and they clearly fit over the front BBK.

ShakeNBake

I don't think it's that easy. The club sport is running pfc racing calipers that are very low profile, and has a different upright with slightly different geometry. I don't think you can put an 18" wheel on it without at least going to better, low profile caliper like a stop tech or pfc.

krell

Perhaps. I'm running an 18" Apex EC-7 on my M3 with six pot Brembos on the front (355mm). Most 18"s won't clear, but the barrel design on these wheels do, which is why I bought them.

ShakeNBake

I had 18" wheels on my .2rs with 380mm brakes and they were specially designed to clear - so I get why you are asking - but it had totally different calipers (lower profile with a removable bridge) and different suspension geometry which didn't get in the way. If the 991 gt3 guys are running 18" wheels then you have a chance, at least in front.

Tom Tweed

991 GT3 guys are NOT running 18s. You not only have to change calipers, you have to change to Cup suspension. https://rennlist.com/forums/991-gt3-...explained.html

I believe the rear suspension on the GT4 is also different than the Clubsport race car in the same way, and the rear toe arm knuckle is not going to clear an 18" rim. The Clubsport rear suspension is spec'ed on the Porsche site as a "modified wishbone from the 911 GT3 Cup," so the suspension clearance in the rear may be just as problematic on the GT4. The mods necessary to fit 18s on the GT4 may be more extensive than most folks can justify. I haven't heard of anyone doing it successfully yet.

TT

orthojoe

Any update or additional confirmation on this?

I've emailed finspeed and PM'd mvez several weeks ago, but no response yet

Tom Tweed

I called Finspeed last month about 991 GT3 CL rims and they were in the middle of moving their shop to Texas, so that may explain their lack of response lately.

TT

ExMB

A move to a new place, states away, can take a long time; I guess. I contacted them as well, month ago, before settling on Forgelines and received the same answer.

nxfedlt1

They just moved to Austin, and I was at winding road looking at a vette that had a bbk with their 18's on it. I've never seen wheels with a stepped barrel designed that way, but I have no doubt they can get one in 18 to fit after seeing that. One of you Austin members that already has your car please drop it off for them to design around!