Help with square setup on style 189's

Faredo · 07-14-2018, 05:46 PM

I know this question has been asked before, but there is so much information and i cant find much on my particular setup.

Currently running Firehawk indy 500's in OEM size (225/40/18 and 255/35/18) with spacers at 15mm front and 20mm rear. zero rubbing very flush. stock height rear and 3/4 lower in the front.
My rears need changed and would like a square setup on my stock 189's. Fitment is perfect now so i would like to stay 255's all the way around or can get different spacers if needed. Need help with the sizing and spacer math please.

Available sizes
215/40R1889W 215/45R1893W 225/40R1892W 225/45R1895W 225/50R1895W 235/40R1895W 235/45R1898W 235/50R18101W 235/55R18100W 245/35R1892W 245/40R1897W 245/45R18100W 255/35R1894W 255/40R1899W 255/45R18103W 265/35R1897W 275/35R1895W 275/40R1899W19

boosthead · 07-15-2018, 07:21 AM

I like this online calculator that lets you easily change the effective offset with different spacers and difference in clearance from stock and/or your current setup.

https://www.wheel-size.com/calc/

Antetokounmpo · 07-18-2018, 01:44 PM

255 on the front 8" is too wide, 245 is the widest I'd go for an 8"

07-14-2018, 05:46 PM	#1
Faredo Lieutenant 311 Rep 404 Posts Drives: 335i Join Date: Sep 2016 Location: Arkansas iTrader: (0)	Help with square setup on style 189's I know this question has been asked before, but there is so much information and i cant find much on my particular setup. Currently running Firehawk indy 500's in OEM size (225/40/18 and 255/35/18) with spacers at 15mm front and 20mm rear. zero rubbing very flush. stock height rear and 3/4 lower in the front. My rears need changed and would like a square setup on my stock 189's. Fitment is perfect now so i would like to stay 255's all the way around or can get different spacers if needed. Need help with the sizing and spacer math please. Available sizes 215/40R1889W 215/45R1893W 225/40R1892W 225/45R1895W 225/50R1895W 235/40R1895W 235/45R1898W 235/50R18101W 235/55R18100W 245/35R1892W 245/40R1897W 245/45R18100W 255/35R1894W 255/40R1899W 255/45R18103W 265/35R1897W 275/35R1895W 275/40R1899W19 __________________ Mods related to trouble shooting posts: Stock Turbos, MHD OTS V7 stage 2+ 93 oct, VRSF Downpipes, VRSF Relocated inlets, CTS Turbo 7" Intercooler, Tial BOV with upgraded line 5.56mm, index 12 injectors, A/T OEM Flash.
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07-15-2018, 07:21 AM	#2
boosthead Private First Class 40 Rep 124 Posts Drives: 2009 328ix Join Date: Jan 2017 Location: VA iTrader: (0)	I like this online calculator that lets you easily change the effective offset with different spacers and difference in clearance from stock and/or your current setup. https://www.wheel-size.com/calc/
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07-18-2018, 01:44 PM	#3
Antetokounmpo Brigadier General 1550 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	255 on the front 8" is too wide, 245 is the widest I'd go for an 8" __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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