safest spacer thickness for auto-X? rpf1 17x9 +45
 

Hello everyone, so I just pulled the trigger the other day on a set of rpf1s someone on here was selling. I chose +45 > +35 Becuz I didn't want poke & I hate stances cars (all form, no function.) The only down side to the +45 I've found is that w the 245 tires they have on them, it'll rub the strut perch at stock & even w coilovers I've read of probs rubbing against the tie rods. So it brings me to the topic at hand, what spacer thickness is ok? Was the max limit that would be too much? How can I go about this? Even then I'd love to bring the wheels flush w the fender. Any advice would be greatly appreciated. Thank u all :thanks:

+35 fits without poke with a little bit of camber-which is good for autox anyways....

People run +35 on all corners with 245 width tires and no issues. Wouldn't really call that all form and no function.


3mm-5mm is the most I see people run on stock studs.

+35 is far from no function. 2.7 degrees front, 1.65 degrees rear with 255's. No rubbing and dead even with top of fender.

https://scontent-a-dfw.xx.fbcdn.net/...27702865_n.jpg

That being said, I would not run more that a 3-5mm spacer on stock studs.

255/40/17 on our red car which is competed nationally for autocross, also put down some serious lap times at a couple tracks and is 17x9 +35. Frankly thats the only way to go. No rubbing anywhere and fits in the fenders just fine. We even have a local client running this set up on swift springs and he loves it. Track days and autocross. :)

http://ft86speedfactory.com/images/R...ei_RPF1-10.jpg

http://ft86speedfactory.com/images/R...ei_RPF1-15.jpg

http://ft86speedfactory.com/images/R...ei_RPF1-24.jpg

I believe I made a huge mistake now... Ugh.. I feel so stupid. I'm new to buying wheels so I shoulda known better & asked someone for some input

Did you get the +45 from us? If so we can work an exchange on them. Always feel free to email or call us. We have two cars in house we race on track and autocross so have a ton of knowledge on what works and what doesn't we're always willing to share with our clients.

What setup? 255/40 all around? or 245/40?

Thanks

I'm currently running swift springs with stock struts. Ordered 255/35 all around for 18x9.5 +38. I try to read all possibilities that the setup would not rub.
The overall wheel diameter is really close to spring perch, 5mm away. Does tire's section width will be wider under load? Like how many %? 255 is still less than my overall wheel width which is 10.5 inch.

Do I need any spacers? Thanks. I'm just not sure about the tire's section width under load.

I'm going coils but currently out of budget.

are you staying stock suspension? i have rpf1's in 17x9 +45 with 245/40/17's too. i love them. i only rub on full lock with the tie rods. not a big deal at all. the only issue i have is with the rear. it doesnt sit flush and it looks ugly. the front sits perfect and looks great. ive been debating on getting 10mm spacers for the rear but i dont want to get into changing the studs so im gonna pass.

im now on coils too so there is no issue with the spring perch. on factory suspension, you will be really close to the spring perch up front but you wont rub. ive seen tons of photos of the +35 offset and trust me, there is poke up front and it looks awful. you made the right call IMO. if youre really that upset, just get a good set of 10mm spacers for the rear and replace the studs. its not that big of a deal and youll love the look of it.

check the wheel category threads. the guys at Togue Factory have spacers on their car and they track their car. it looks amazing too with the +45 and spacers. dont worry. youll be happy with them. i do recommend coils though. :thumbsup:

http://i262.photobucket.com/albums/i...1974/brzdc.jpg
http://i262.photobucket.com/albums/i...974/brzwbt.jpg
http://i262.photobucket.com/albums/i...4/IMG_3763.jpg
http://i262.photobucket.com/albums/i...s1974/2222.jpg

No I didn't get them from yall. Wish I could say I did. Thats a very nice thing to offer thou. Thank u.

I'm going to get a refund for them. I'll be ordering some +35's now then. Can I get that amount of camber on out of the stock equipment?

you really can't adjust camber with stock equipment. you're going to need rear LCA's and front crash bolts for some good amount of movement

It boggles my mind why people will run 9" wheels with 245's with 0* of camber up front. If you're going to go with that much grip you NEED to run at least -1.5* of camber, probably happier with -2*, up front.

With 2* of camber and +35 you'll have no poke at all.

17x9 et 45 with 5mm spacer and 255/40/17 ZIIs Camber is at -2 all around.

http://i67.photobucket.com/albums/h3...ps10585c00.jpg

5mm spacer all around?

i was thinking of doing the 5mm spacer for the rear. do you recommend it? safety wise? all i hear is everyone saying how unsafe spacers are. thx

Spacers are fine. We recommend getting some extended studs and open ended lugnuts though, if you're using any more than 5mm. You want to make sure your lugs have enough turns.

@ImperiousRex's car is on 17x9 +45 RPF1 with 20mm spacers in the front in this video. ARP studs and open ended lugnuts as well.

[ame="http://www.youtube.com/watch?v=XU4Sa3RCCV4"]Willow Springs International Raceway BRZ/FRS/GT86 lap record 1:30.778 - YouTube[/ame]

thats the thing. i want a 10mm spacer but dont want to replace the studs (mainly because i might get different wheels in the future). so is the 5mm spacer safe with the factory studs?

I wouldn't recommend any hard driving on it.

What's wrong with replacing the studs? Studs are universal, regardless of the wheel you have. Alternatively, you can cut the studs shorter before replacing, if you want them to be shorter.

*edit* Oops, I've been informed he is on 20mm spacers.

Yes.

I have 10MM extended studs and open ended lugs. They are safe if you have enough thread engagement on the lugs. See what Mike says below. I've seen some people do 3-5mm spacers on stock studs but I was not willing to try it.

where did you buy your studs and spacers from?

We sell them :)

i think i already asked you but what spacers/ studs do you sell in 10mm that would be the best. i already have the extended open ended lugs

I'm running ARP 10mm extended studs (don't have a part # for FR-S/BRZ but WRX/STi ones are the same) and H&R 5mm spacers. Since Mike helped in the thread you should buy them from him!

did the 5mm spacers cover the stock studs are do they stick out a lil.
im just curiuos if the rpf1 have enough room on the backside

I think you're confused on the type of spacer. A 5mm spacer will be slip-on, not bolt-on. You don't need to worry about room on the backside of the wheel, because the wheel will be attached to the studs. For bolt-on spacers, 20mm will still stick out a bit and will need a wheel with pockets on the back; 25mm will clear the studs completely.

I have rpf1 17x7.5 +48
Would they poke too much with 25mm bolt on?

Sent from my SM-G928V using Tapatalk

A 17x7.5 +48 with a 25mm spacer will put the wheel's outside edge at about the same spot that a 17x9 +42 does (difference of 0.05mm), so that should give you a reference to see if you like how it looks.

Here's an example, and one of my favorite cars on this forum. He's on 17x9+42 with 255/40 tires, and lowered about 1.2". If your car is lowered, then the wheels should be spaced about the same. If you want the back wheels to be similarly close to the fender, consider 30mm spacers on the back and 25mm spacers on the front.
http://www.ft86club.com/forums/showthread.php?t=13157


Edit: For track usage, unless you actually need spacers to help clear suspension or brake components, I would take them off and run just the wheels. Under extreme stress, the spacers are just another potential point of failure, so if you can eliminate that, you should. They'd probably be fine, but why risk it if you don't have to? For daily driving, they'll be fine. I've been on 20/25mm spacers for two years now with no issues.

Think I'll order me some 25mm

Sent from my SM-G928V using Tapatalk

I have 2.4 degrees setup on the rears eih lcas.and 2.2 up front. So 25mm should be perfect. I'm dropped about 2 inchs

Sent from my SM-G928V using Tapatalk