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I'm also looking at Forgestar F14s and I was thinking of going +48 front and +35 rear (-7mm from stock XRR wheels per SCCA rules). Is there any reason you would go 49/37 vs. 48/35? I'm assuming that small change shouldn't cause fitment issues. I've found other posts that make me think I'm safe in the rear (people with lowering springs and 11" wide wheels with 295s on the rear with similar offsets) but haven't found many posts about running 265+ tires in the front.
As far as I know, I was the first person to have Forgestars made to 18" XRR sizes for a 987.2S and I was unsure about fitament. My original intent was to stick with OEM offset, but F14 was the only wheel Forgestar could make with our required sizes/offsets and even then the least offset Forgestar could make 8.5x18" F14s was +49. So, I went with that in the front because I didn't have much choice. I had more flexibility in the rear. It's easier to add positive spacers than negative spacers but I didn't want to use more than 5mm, so I speced out +40 which I could easily run anywhere from +40 to +35 with cheap spacers. I ended up using my +40 rear with 3mm spacers, so I could have gone with +37 for the same overall effect. You shouldn't have any issue with 48/35.
I bought gunmetal, but they ended up a lighter shade that I had hoped; I really liked the anthracite finish on my old OZs. They're in the photo in my avatar.
[...]the least offset Forgestar could make 8.5x18" F14s was +49.
Interesting. I just got off of the phone with modbargains and they told me the offset limit would be +48 (I was asking for +49). Didn't order yet but kind of odd. They did tell me they'd do the +49 but it wouldn't come with a warranty.
Interesting, indeed. I went back and forth with Sam Strano a couple times when I ordered because Forgestar couldn't make the wheels I wanted, and we discussed several different offsets. Maybe mine are +48 after all? I verified the offsets with a ruler, but a +/-1mm is hard to measure accurately.
Here's a better photo. I'm using black lug bolts, but silver would probably look better with them.
Yea the guy from Modbargains even talked to Forgestar and they're saying they don't think the +48 offset will fit because of the brakes and that they'd need to go down to a +45. This is for a 2006 Cayman S. So it's back to the drawing board for me for now.
From what I can find, our brakes are the same sizes.
Yea the guy from Modbargains even talked to Forgestar and they're saying they don't think the +48 offset will fit because of the brakes and that they'd need to go down to a +45. This is for a 2006 Cayman S. So it's back to the drawing board for me for now.
From what I can find, our brakes are the same sizes.
My fronts clear the calipers by a solid 10mm in the front, there's a lot of room. 2010 Boxster S.
I was doing some searching to see if other people have had a similar experience with fitment concerns by the manufacturer. I found a few claims that these wheels tend to get quite a bit heavier than advertised once the custom offsets are applied. Did you happen to weigh your Forgestars when you got them?
I was doing some searching to see if other people have had a similar experience with fitment concerns by the manufacturer. I found a few claims that these wheels tend to get quite a bit heavier than advertised once the custom offsets are applied. Did you happen to weigh your Forgestars when you got them?
20 & 22lbs respectively, which is about 2lbs/wheel heavier than the OZs. However, the only reason I bought these was because I bent an OZ on a pothold and figured if I'm already $400 in regardless which direction I go, might as well take the opportunity to upgrade! I don't mind the extra weight if it means extra durability.
Since I click around on the internet too much, I found another inexpensive XRR option. There's a Euromeister GT3 replica wheel in 18x8.5 ET52 / 18x10 ET54. They're $872 for a set of all 4, and the Automotion people usually have sales on top of that. Just drop what I have in italics in Google and they should pop up, not sure if it's uncouth to link to companies. I have the Euromeister fake Fuchs on my air cooled car. They're not the greatest thing in the world but they get the job done, and they're surprisingly light for cheap wheels. You'd just need ~10mm spacer / lugbolt kit for the rear.
Thanks for the tip, burglar. I hadn't come across that one. I actually ordered a set of Alleggerita HLTs yesterday. Not as cheap but they seem to be significantly lighter than anything else in that price range. Planning on doing some vinyl rim stripes in hopes of making them slightly less ugly - we'll see
Anyone else catch this proposal out for feedback in the SCCA February Fasttrack? The 981S would be moved from SS to AS, which would be a non-event in terms of upsetting the current top cars in AS. The more interesting one is moving the base 981 Boxster and Caymans from AS to BS. BS has a nice variety of competitive cars, and this would certainly add to the mix.
Unfortunately, there are approximately no base 981 in the nation that have any of the go-fast options required for competitive autocross. They're rare enough on 981S. GTS in AS could be fun, though!
Unfortunately, there are approximately no base 981 in the nation that have any of the go-fast options required for competitive autocross. They're rare enough on 981S. GTS in AS could be fun, though!
How would you option a 981 / 981S? I'm assuming PDK for the quicker shifting and ability to go to first if needed, Sport Chrono for launch control, and PASM? I don't think you can get the Sport Suspension with PASM. It's one or the other, as I recall.
I recently picked up a 981S with PDK, Sport Chrono, and PASM. I didn't buy it with autocross in mind, but I would like to see it in AS rather than SS.
01-29-2018, 05:36 PM
