Using wheel spacers to even up front and rear track

The Arp · 05-09-2010, 11:14 PM

Hello,

So after talking with a wheel vendor about gettign some 18' wheels to put a set of r compounds on for track and autocross use they recommended a some 18X 9.5s with +20 offset all around. I was thinking of running 275s all around. Now i know wider wheels will fit but, I just drive the car for fun so I don't feel I need the wides wheels possible.

Other than being a little worried about clearance in the font i also concerned that I will end up changing the track with relationship front to rear (fronts pushed out more than the rears). Is it a bad idea to run a 10mm or 15mm spacer on the rears to even up the track or should I just buck up and get wheels with different offsets?

craniac24 · 05-10-2010, 12:02 AM

Many people on here have installed spacers, including myself.

travisjb · 05-10-2010, 12:27 AM

For NASA time trial events, I'm going to run 275 square setup with identical wheels front and rear so i can swap... will be using 15mm spacers on rear... problem is going to be oversteer, so I will tweak my suspension setup to try and get it more neutral with this config

The Arp · 05-10-2010, 08:07 AM

Alright so it doesn't sound like I'll be the only one using spacers to accommodate a square set wheels. Now I just have to convince myself that a 20mm offset isn't too pushed out in the front.

kenchan · 05-10-2010, 11:33 AM

if you lower it it wont appear like a 4x4.

The Arp · 05-10-2010, 08:56 PM

Quote:

Originally Posted by travisjb

For NASA time trial events, I'm going to run 275 square setup with identical wheels front and rear so i can swap... will be using 15mm spacers on rear... problem is going to be oversteer, so I will tweak my suspension setup to try and get it more neutral with this config

Travis, can I ask what offset you are using in the front?

travisjb · 05-10-2010, 10:46 PM

18x10 +34 all around

The Arp · 05-10-2010, 10:55 PM

See that is what worries me, you're running 34mm offset . I think the 18X9.5 20mm offset that the wheel vendor recommended is too aggressive especially with a 275 tire I'm trying to run and without camber arms. They assured me that they won't rub but I can't anyone running that kind of offset without a lot of negative camber.

travisjb · 05-10-2010, 11:16 PM

I run about -3 front negative camber and have maybe a quarter inch of clearance without rolling the fenders... that's also with a 285 hoosier series tire on the front, which runs more like a 295... so, what's the math? according to this calculator
http://www.1010tires.com/WheelOffsetCalculator.asp
you'll be an extra 8mm out... which is about 0.3 inches... I suspect if you run a 265 or at most 275 tire with -1.0 camber, you'll be fine

05-09-2010, 11:14 PM	#1 (permalink)
The Arp Base Member Join Date: Jul 2009 Location: Simi Valley Posts: 38 Drives: 2009 370z white m6 Rep Power: 15	Using wheel spacers to even up front and rear track Hello, So after talking with a wheel vendor about gettign some 18' wheels to put a set of r compounds on for track and autocross use they recommended a some 18X 9.5s with +20 offset all around. I was thinking of running 275s all around. Now i know wider wheels will fit but, I just drive the car for fun so I don't feel I need the wides wheels possible. Other than being a little worried about clearance in the font i also concerned that I will end up changing the track with relationship front to rear (fronts pushed out more than the rears). Is it a bad idea to run a 10mm or 15mm spacer on the rears to even up the track or should I just buck up and get wheels with different offsets?

05-10-2010, 12:02 AM	#2 (permalink)
craniac24 Enthusiast Member Join Date: Mar 2010 Location: Ronkonkoma, NY Posts: 339 Drives: 2010 PG Roadster Rep Power: 402	Many people on here have installed spacers, including myself. __________________ 2010 6MT PG Roadster w/Sport & NAV. Stillen Exhaust, Stillen GIII Intake, Eibach Springs, H&R Spacers 15f/20r, SPC Rear Camber Kit. Thanks to Vinny Ten Racing!

05-10-2010, 12:27 AM	#3 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	For NASA time trial events, I'm going to run 275 square setup with identical wheels front and rear so i can swap... will be using 15mm spacers on rear... problem is going to be oversteer, so I will tweak my suspension setup to try and get it more neutral with this config __________________ 2009 370Z #104 For Sale

05-10-2010, 10:46 PM	#7 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	18x10 +34 all around __________________ 2009 370Z #104 For Sale

05-10-2010, 11:16 PM	#9 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	I run about -3 front negative camber and have maybe a quarter inch of clearance without rolling the fenders... that's also with a 285 hoosier series tire on the front, which runs more like a 295... so, what's the math? according to this calculator http://www.1010tires.com/WheelOffsetCalculator.asp you'll be an extra 8mm out... which is about 0.3 inches... I suspect if you run a 265 or at most 275 tire with -1.0 camber, you'll be fine __________________ 2009 370Z #104 For Sale Last edited by travisjb; 05-10-2010 at 11:19 PM.

05-10-2010, 08:07 AM	#4 (permalink)
The Arp Base Member Join Date: Jul 2009 Location: Simi Valley Posts: 38 Drives: 2009 370z white m6 Rep Power: 15	Alright so it doesn't sound like I'll be the only one using spacers to accommodate a square set wheels. Now I just have to convince myself that a 20mm offset isn't too pushed out in the front.

05-10-2010, 11:33 AM	#5 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141520	if you lower it it wont appear like a 4x4.

05-10-2010, 10:55 PM	#8 (permalink)
The Arp Base Member Join Date: Jul 2009 Location: Simi Valley Posts: 38 Drives: 2009 370z white m6 Rep Power: 15	See that is what worries me, you're running 34mm offset . I think the 18X9.5 20mm offset that the wheel vendor recommended is too aggressive especially with a 275 tire I'm trying to run and without camber arms. They assured me that they won't rub but I can't anyone running that kind of offset without a lot of negative camber.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Anyone have a setup of 15mm spacers in front and 20 rear?	Jourelemode	Wheels & Tires	170	05-23-2014 05:42 PM
Rear Wheel suggestions for 1/4 mile track setup	chuckd05	Wheels & Tires	1	08-01-2012 06:40 PM
Ichiba V2 Wheel Spacers with Built in Studs DO fir the front	chuckd05	Wheels & Tires	49	11-24-2011 12:05 PM
wheel spacers	black09Z	Wheels & Tires	9	05-19-2011 10:10 AM
Are my wheel spacers damaged?	azn370z	Wheels & Tires	11	03-31-2010 10:53 PM