Wheel/Tire size computer found, is it correct?

FC Zach · 03-10-2016, 03:39 AM

I've read the fitment thread and searched many others as well as search wheel/tire size computers like: http://www.rimsntires.com/wheel.jsp?...7&carYear=1987 (which is pretty freaking awesome, even shows guaranteed fitments with tire sizes) but still curious based on others experiences, I don't want to eff this up. .

The fitment thread here on RCC is concise and foolproof http://rotarycarclub.com/rotary_foru...ead.php?t=1828. The first post states "I've been told that +30 on a 8 inch rim works perfectly." but the wheels I have my heart set on are 18x8" and appear to only come in a few offsets, with 35 being one of them.

My question is: Will that extra 5mm cause fitment issues specifically with my non-coilover suspension?

If the calculator link appears to be accurate, maybe someone could sticky that to this forum?

infernosg · 03-10-2016, 08:11 AM

I've seen 17x8 +35 and 17x9 +35 called the "ideal" front and rear wheel dimensions and I've seen a few examples in person. Based on that I'd think your 18x8 +35 optons would be okay. I guess the only concern would be the extra 1" diameter since the springs get larger in diameter.

Even though I have adjustable coilovers, I can share my experience. My old wheels were 16x8 +32 with 225/50R16 tires. I had two issues: the inside sidewall rubbed one of the coilover lock collars and the outside sidewall would catch the lip on the inside of the fender. To get around these I used a camber bolts to rotate the hub away from the coilover and ran about -1.5 degrees of negative camber to get away from the fender, which still had to be rolled. Had I run a 17x8 +35 I don't think I'd have run into either of these problems.

FC Zach · 03-10-2016, 08:20 AM

Quote:

Originally Posted by infernosg

Based on that I'd think your 18x8 +35 optons would be okay. I guess the only concern would be the extra 1" diameter since the springs get larger in diameter.

Yep, that's the one factor that I'm worried about.

djmtsu · 03-10-2016, 09:09 AM

17's. Just sayin

FC Zach · 03-10-2016, 09:10 AM

Eh. .

djmtsu · 03-10-2016, 09:20 AM

18's look too big on an FC body, and the tires cost more.

Lose, lose.

Pete_89T2 · 03-10-2016, 09:36 AM

Quote:

Originally Posted by djmtsu

18's look too big on an FC body, and the tires cost more.

Lose, lose.

^And they are heavier than 17s or 16s, which costs you performance.

FC Zach · 03-10-2016, 09:38 AM

To be fair, these wheels are only 18lbs

***TitaniumTT*** · 03-10-2016, 09:55 AM

Quote:

Originally Posted by FC Zach

I've read the fitment thread and searched many others as well as search wheel/tire size computers like: http://www.rimsntires.com/wheel.jsp?...7&carYear=1987 (which is pretty freaking awesome, even shows guaranteed fitments with tire sizes) but still curious based on others experiences, I don't want to eff this up. .

The fitment thread here on RCC is concise and foolproof http://rotarycarclub.com/rotary_foru...ead.php?t=1828. The first post states "I've been told that +30 on a 8 inch rim works perfectly." but the wheels I have my heart set on are 18x8" and appear to only come in a few offsets, with 35 being one of them.

My question is: Will that extra 5mm cause fitment issues specifically with my non-coilover suspension?

It's the non coilover suspension that might bite you in the ass. My rims are 17*8 and 17*9, both + 35 and I have no issues.
Run 245/40/17 up front and 255/40/17 rear. I could go larger on both ends and plan on it

Quote:

Originally Posted by FC Zach

If the calculator link appears to be accurate, maybe someone could sticky that to this forum?

Sure

Quote:

Originally Posted by djmtsu

18's look too big on an FC body, and the tires cost more.

Lose, lose.

Neg, I run 18's on the enkeis with the hoosiers. I can't quite remember the sizes... lemme see if I can find them. They're fucking huge though. Like 275/30/18 & 245/30/18
The actual sizes of the hoosiers don't translate well to street tires. the 245 R6 is significantly wider than the 245 Toyo's

Actually.... lemme see if I can dig up the receipt.

Quote:

Originally Posted by FC Zach

To be fair, these wheels are only 18lbs

Linky?

FC Zach · 03-10-2016, 10:25 AM

Quote:

Originally Posted by TitaniumTT

Linky?

http://www.tsw.com/alloy_wheels_nurburgring.php

***TitaniumTT*** · 03-10-2016, 10:38 AM

Sexy.

I emailed my guy at the tirerack asking for the receipt for the Enkei's I bought... when I get that info I'll post it up. Worse comes to worst I can always look at the wheels over the weekend

djmtsu · 03-10-2016, 10:49 AM

Quote:

Originally Posted by FC Zach

http://www.tsw.com/alloy_wheels_nurburgring.php

You only want these because they are 'rotary forged'.

I'm worried that the offsets will be weird, or they'll sit too flush.

Yo shit needs lips brah.

FC Zach · 03-10-2016, 10:52 AM

Quote:

Originally Posted by djmtsu

You only want these because they are 'rotary forged'.

Guilty

***TitaniumTT*** · 03-10-2016, 11:14 AM

Aight, heard back from my guy at le rack of tires

Front -
Enkei RPF-01's 18*8.5 +30, Hoosier R6 245/35/18
Rear
Enkei RPF-01's 18*10 +38, Hoosier R6 275/35/18

Yes - 10" rim, 275 wide tire, stock body work. Rolled the lips that was it. Tire would rub the exhaust heat shield and the lower control arm so ideally a +35 I think would work but it would definitely rub the quarters at that point. Well actually..... I'm sure the width on 275 streets would be smaller than a 275 R6. So there's that.

FC Zach · 03-10-2016, 11:22 AM

Well I'll take that as a definite yes that I can fit 18x8 with 215/40/18 on all four corners without a doubt. . May need to do something about the non coilover suspension so it could definitely fit. .

03-10-2016, 03:39 AM	#1
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Wheel/Tire size computer found, is it correct? I've read the fitment thread and searched many others as well as search wheel/tire size computers like: http://www.rimsntires.com/wheel.jsp?...7&carYear=1987 (which is pretty freaking awesome, even shows guaranteed fitments with tire sizes) but still curious based on others experiences, I don't want to eff this up. . The fitment thread here on RCC is concise and foolproof http://rotarycarclub.com/rotary_foru...ead.php?t=1828. The first post states "I've been told that +30 on a 8 inch rim works perfectly." but the wheels I have my heart set on are 18x8" and appear to only come in a few offsets, with 35 being one of them. My question is: Will that extra 5mm cause fitment issues specifically with my non-coilover suspension? If the calculator link appears to be accurate, maybe someone could sticky that to this forum? __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-10-2016, 08:11 AM	#2
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA iTrader: (5) Posts: 811 Rep Power: 15	I've seen 17x8 +35 and 17x9 +35 called the "ideal" front and rear wheel dimensions and I've seen a few examples in person. Based on that I'd think your 18x8 +35 optons would be okay. I guess the only concern would be the extra 1" diameter since the springs get larger in diameter. Even though I have adjustable coilovers, I can share my experience. My old wheels were 16x8 +32 with 225/50R16 tires. I had two issues: the inside sidewall rubbed one of the coilover lock collars and the outside sidewall would catch the lip on the inside of the fender. To get around these I used a camber bolts to rotate the hub away from the coilover and ran about -1.5 degrees of negative camber to get away from the fender, which still had to be rolled. Had I run a 17x8 +35 I don't think I'd have run into either of these problems. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS

03-10-2016, 09:09 AM	#4
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	17's. Just sayin __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

03-10-2016, 09:10 AM	#5
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Eh. . __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-10-2016, 09:20 AM	#6
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	18's look too big on an FC body, and the tires cost more. Lose, lose. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

03-10-2016, 09:38 AM	#8
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	To be fair, these wheels are only 18lbs __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-10-2016, 10:38 AM	#11
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Sexy. I emailed my guy at the tirerack asking for the receipt for the Enkei's I bought... when I get that info I'll post it up. Worse comes to worst I can always look at the wheels over the weekend __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

03-10-2016, 11:14 AM	#14
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Aight, heard back from my guy at le rack of tires Front - Enkei RPF-01's 188.5 +30, Hoosier R6 245/35/18 Rear Enkei RPF-01's 1810 +38, Hoosier R6 275/35/18 Yes - 10" rim, 275 wide tire, stock body work. Rolled the lips that was it. Tire would rub the exhaust heat shield and the lower control arm so ideally a +35 I think would work but it would definitely rub the quarters at that point. Well actually..... I'm sure the width on 275 streets would be smaller than a 275 R6. So there's that. __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

03-10-2016, 11:22 AM	#15
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Well I'll take that as a definite yes that I can fit 18x8 with 215/40/18 on all four corners without a doubt. . May need to do something about the non coilover suspension so it could definitely fit. . __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4 Last edited by FC Zach; 03-10-2016 at 11:35 AM..