2008 spec b + rev. c bilsteins fitment questions

[m sprank]

As best memory cooperates.  05 LGT rbp with KW's and 18x8 drag wheels. 45+ offset?  235 tires.  

08 specb dgm. Rpf 1 18x8 +45. 225 tires. Usdm spec b bilsteins, epics iirc. 

08 lgt dgm (bbk). Rpf 1 18 x 8 +45 225.  Tokiko struts with swift springs, spec b top hats and 3/8" rear spacers. 

 

No fender mods on any car.

[pleiadesfella]

1 hour ago, Underdog said:

Have you read the Xenonk FAQ? It will tell you what offset and width will work without interference. 

dammit! I was going to read that at work but then an urgent call must have came in, because I clearly didn't read it properly

thanks for reminding me of it, although some statements in that post bring up more questions than answers to me, for example:

-it's stated that 255/40/17 is a viable tire size for a 17x9 rim, but in this thread I was told that 255 was too wide for our cars and that even 245 would be pushing it. if I were to follow the faq, then I would get the pf05s I was looking at, but I was told that was a bad idea. who's in the right here?

-in the faq it's also stated that 255/35/18 is a very good size for daily driving, and that 9.5" is a viable wheel width, but I know from personal experience that this isn't true. my wheels are too wide and stick out like crazy on stock suspension. even with the coils they were pushing it. not to mention the dreaded tierod contact on full lock.

otherwise that's a really helpful thread and I feel like an idiot for not reading it fully before. thanks once again for telling me, though I'm glad I was able to hash out some finer details about my suspension here

 

it also turns out that the japanese vendor I'm buying from contracts paypal exclusively for their foreign buyers, so the gtx01 set became a bit more expensive than I thought thanks to paypal's greedy exchange rate. now I'm looking at getting either:

-the pf05s I initially mentioned, 17x9 +40 with 255/40 tires (according to the faq this should work well enough)
-advan avs model 7 18x7.5 +50 or enkei gtc01 18x7.5 +48 with 225/40 tires (don't prefer a narrow size like this but they're good wheels and the lowest price options of all)
-work emotion 11r-ft +50 with either 225/40 or 235/40 tires (according to the faq this should be nearly perfect)

 

1 hour ago, m sprank said:

As best memory cooperates.  05 LGT rbp with KW's and 18x8 drag wheels. 45+ offset?  235 tires.  

08 specb dgm. Rpf 1 18x8 +45. 225 tires. Usdm spec b bilsteins, epics iirc. 

08 lgt dgm (bbk). Rpf 1 18 x 8 +45 225.  Tokiko struts with swift springs, spec b top hats and 3/8" rear spacers. 

 

No fender mods on any car.

these pics are really good to see, thank you. I thought 225s would run a bit narrow on 8" since most combos like this I've seen had a bit of stretch on the tires, but yours look perfect. I gotta say I really do love the first setup with the 235s the most though. but these pics will definitely help me come to a conclusion now that some wheels I mentioned before are out of reach in terms of price/convenience.

Edited February 6, 2023 by pleiadesfella

[Underdog]

I’m not a fitment guy so I can’t say authoritatively, I run boring 18x7.5 e48 and 17x8 e45 setups with 225 width tires. The 17x8 e45 is ideal, for me. You can see pics of both here (comment dated September 9th, 2011), the 17x8 is at the bottom of the post and is wearing a 225/45 in those pics. At the time the car was on KW/RCE coilovers, but later in the thread I move on to Bilstein coilovers. I’ll spare you further suspension talk other than to ask what is your rear camber adjustment solution? Because the car does not have rear camber adjustment from the factory, so you’ll need adjustable links or the eccentric bushing for the upper lateral link. Whiteline offers both. 

Per the FAQ you would need an offset of 38mm or less to run a 9.5” wheel without contact. I think you mentioned yours were 40mm. Also the FAQ is about what fits with the caveat of clearing coilover spring perches and with possible fender rolling (in a motor sports scenario), but isn’t about “fitment” per se. However there is lots of good information in the follow-up comments to the thread, and even the original FAQ which is linked at the bottom of the first post. Lastly, remember that actual tire dimensions for a given size vary from one manufacturer to the next, enough that what size fits for one size on one car might not fit another combo. 

Given your requirements in the OP I would suggest something like a 17x8 e45 RPF1 with a 235/40 or 245/40. Lightweight, plenty of room to adjust alignment, stock gearing and close to stock scrub radius. You could do a 225/45 which will be a little taller and fill the wheel arches better but is going the wrong direction in gearing for autox, where a smaller OD will give you faster acceleration.

[BoozeRS05]

I’ve run 17x9 +45 RPF1’s with a 235/40/17 and they fit, but poorly. I’ve tried 18x8.5 +40 with a 235/40/18 and they fit, but poorly. If you’re fenders are rolled or pulled you’ll be able to fit more wheel/tire, but ideal fitment is different.

In my opinion the perfect fitting wheel for our cars performance/style would be:

17x8.5 +48 with a 225/45/17

18x8.5 +48 with a 235/40/18

[pleiadesfella]

these last posts were quite helpful, thanks guys

I did have a set of decently priced 17x8 rpf1s on my wishlist but they sold, so I'll be holding off for the next few days to see what other wheel options come up. I wish buying wheels wasn't this big of a deal for me and that I could just order a brand new set of my liking from a local supplier, but unfortunately the cost of doing so in eastern canada is astronomical. the used wheel market here sucks too since the cost of new wheels from quality brands is crazy high, so all I have for used options are fast and rtx wheels at high prices. and like I said, it is quite literally much cheaper to order a used set from japan and have it shipped in, even if it is a little scuffed here and there, so I have to wait and see what they get in stock.

thanks for the help once again folks, I'll update this thread when I finally order my wheels, and hopefully I'll have pics of the car on both the wheels and the springs in the summer

[pleiadesfella]

just an update, I ended up ordering the rs-r f012d springs and a set of 18x8 +48 enkei gtc01 from the vendor for a total of $1631.86 CAD (which comes to $1218.94 USD currently) including shipping and paypal fees  I plan to get azenis rt615k+ in 235/40/18 once they arrive, I know its a large size but they're priced well from a local vendor and would be helpful in pothole country

thank you all once again, your guidance and pics were helpful in coming to a decision on what to get, and I think I've gotten what I wanted for a good value, even if the wheels are a bit scuffed lol. not worse than the bigass curb rash on my black ts9 on the front right corner tho...

link to wheels I purchased for anyone interested: https://www.croooober.com/en/item/cparts/00000003/Rims/16356898/Wheel-Only-ENKEI-Racing-GTC01

[pleiadesfella]

welp, while I didn't put my springs on yet (some of you might have seen that I am trying to sell them due to newfound fear of potholes ) I did get my gtc01s and new tires on today, and I'm absolutely loving it.

on a bit of an unrelated note, I never realized how much the near bald firestones and oversize wheels made the ride and handling so choppy. I did kind of have my doubts going with an aggressive tire like the potenza re71rs after reading the reviews for them, which usually said how these were an autocross/track specific 200tw tire and would be terrible as a daily tire on rough roads, but after driving them back from costco today I am LOVING them. the ride is so much smoother than I expected, even over our 3rd world roads, and the grip is simply nuts. everything is so smooth and precise now, I can't even believe it.

the wheels look great too, I hated the poke and stretch the old wheel and tire combo had so much. I no longer feel any sort of contact/weirdness at full lock turns, and I feel much more confident while turning the wheel overall.

I took a few pictures, but the more I look at them the more I'm starting to doubt the idea of selling my RS-R springs and putting them on anyway because the ride height looks even weirder with the slimmer wheels lmao. just gotta find a place to get them put on for cheap because for some reason my subaru tuner quoted me $660 to install them, which is just insane compared to all the other estimates I've read online. I was expecting something more around the $200-300 ballpark. I think I'll have to shop around for a good rate that won't break the bank.

anyway, here are the current specs and pics:

wheels: enkei racing gtc01 18x8 +48
tires: bridgestone potenza re71rs 235/40/18 (got a killer deal in this specific size at costco)
stock jdm spec b rev. c suspension and absolutely no spacers

 

(peep the evo parked next to me. that's the type of low I want, especially on the front)

Edited May 10, 2023 by pleiadesfella