Want a drop without losing ground clearance - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

eddieEndo · 03-07-2013, 02:48 PM

So far the least aggressive drop i see is the eibach pros i believe? I just want to get rid of the wheel gap with 18 inch wheels will I negate the ground clearance lost on the drop??? any other spring recommendations for maybe even a smaller amount of drop?

Racecomp Engineering · 03-07-2013, 03:05 PM

Our RCE Yellow springs lower a hair less than Eibach Pro-Kit. 20mm drop front and rear, just under an inch. We also include replacement bumpstops like Eibach. Lots of happy customers.

- Andrew

Chimpo · 03-07-2013, 03:06 PM

Quick and dirty math shows a 235/40/18 would be aprox 20mm taller than the stock wheel/tire combo.

That would be only a 10mm drop in ground clearance with the RCE Yellows.

eddieEndo · 03-07-2013, 03:36 PM

awesome i willbe contacting u guys as soon as i get some wheels

, hate wheel gap but my driveway is steep and my speed bumps are ridiculous

GTB/ZR-1 · 03-07-2013, 04:05 PM

Lemme guess, you want your cake & eat it too? Lol

Seriously, even with 18s, you'll need to make concessions one way or the other.

ATL BRZ · 03-07-2013, 05:31 PM

+1 for RCE Yellows

tisb0b · 03-07-2013, 07:06 PM

Quote:

Originally Posted by Chimpo

Quick and dirty math shows a 235/40/18 would be aprox 20mm taller than the stock wheel/tire combo.

That would be only a 10mm drop in ground clearance with the RCE Yellows.

Your math is off, stock is 215/45/17 to move to an 18" rim typically you'd run 225/40/18 to maintain speedometer accuracy. 10mm extra width is not going to result in 20mm taller than stock. Going with 225/45/18 could work at the expense of speedometer accuracy.

Beyer Subaru · 03-07-2013, 08:26 PM

Yep. @Racecomp Engineering knows what their talking about.

SubieNate · 03-07-2013, 08:35 PM

Quote:

Originally Posted by tisb0b

Your math is off, stock is 215/45/17 to move to an 18" rim typically you'd run 225/40/18 to maintain speedometer accuracy. 10mm extra width is not going to result in 20mm taller than stock. Going with 225/45/18 could work at the expense of speedometer accuracy.

His math is slightly off but it's almost there. A 235/40-18 has a diameter of 25.4 inches and the stock 215/45-17's have a diameter of 24.6 inches. That's a total diameter difference of ~20mm. But, only half of that contributes to ride height, so it would bring it back up 10mm for a 10mm total drop.

Either way, the speedo is jacked and the car is going to be more sluggish as the gearing has been altered.

Changing tire size to compensate for ride height is not the greatest idea. Either deal with a lower ride height or deal with the gap, or find some compromise between the two (mild drop) that makes things livable. Screwing up the gearing and speedo isn't really a good option.

Nathan

Chimpo · 03-08-2013, 09:11 AM

Quote:

Originally Posted by tisb0b

Your math is off, stock is 215/45/17 to move to an 18" rim typically you'd run 225/40/18 to maintain speedometer accuracy. 10mm extra width is not going to result in 20mm taller than stock. Going with 225/45/18 could work at the expense of speedometer accuracy.

He never asked about speedo accuracy. Obviously going from 625.3mm dia (stock) to 645.2mm dia (235/40/18) would goof it, but that wasn't his question.

03-07-2013, 02:48 PM	#1
eddieEndo Smokin on Dat Endo Join Date: Jan 2013 Drives: 2013 Scion FR-S Whiteout Location: Fullerton, CA Posts: 911 Thanks: 722 Thanked 328 Times in 224 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	Want a drop without losing ground clearance So far the least aggressive drop i see is the eibach pros i believe? I just want to get rid of the wheel gap with 18 inch wheels will I negate the ground clearance lost on the drop??? any other spring recommendations for maybe even a smaller amount of drop? __________________

03-07-2013, 03:36 PM	#4
eddieEndo Smokin on Dat Endo Join Date: Jan 2013 Drives: 2013 Scion FR-S Whiteout Location: Fullerton, CA Posts: 911 Thanks: 722 Thanked 328 Times in 224 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	awesome i willbe contacting u guys as soon as i get some wheels , hate wheel gap but my driveway is steep and my speed bumps are ridiculous __________________

03-07-2013, 04:05 PM	#5
GTB/ZR-1 Senior Member Join Date: Oct 2012 Drives: '13 BRZ in WRB--let's mod!!! Location: Central, FL Posts: 1,224 Thanks: 317 Thanked 449 Times in 262 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Lemme guess, you want your cake & eat it too? Lol Seriously, even with 18s, you'll need to make concessions one way or the other. __________________ * ‘23 Corolla GR—AutoX/DE toy * '13 Toyobaru P&L Turbo WRB BRZ SCCA XS-A build starting. SOLD * '22 Z51 Vette--sold. * '09 Nissan GT-R--gone, but not forgotten... 10.63 @ 131+ on streeties. * '90 ZR-1 11.0 @ 130.2 & 11.2 @ 132.4 sprayed 120 shot.

03-07-2013, 05:31 PM	#6
ATL BRZ TEQSPORT Brand Manager Join Date: Jun 2012 Drives: '24 GR86 + '16 FR-S Location: Atlanta Posts: 3,666 Thanks: 3,725 Thanked 4,137 Times in 1,707 Posts Mentioned: 90 Post(s) Tagged: 6 Thread(s)	+1 for RCE Yellows __________________ ________________________________Toyota \| Lexus Parts & Performance Specialists__________________________________

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03-07-2013, 03:05 PM	#2
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,512 Thanks: 3,537 Thanked 7,407 Times in 3,030 Posts Mentioned: 310 Post(s) Tagged: 9 Thread(s)	Our RCE Yellow springs lower a hair less than Eibach Pro-Kit. 20mm drop front and rear, just under an inch. We also include replacement bumpstops like Eibach. Lots of happy customers. - Andrew

03-07-2013, 03:06 PM	#3
Chimpo Senior Member Join Date: Sep 2012 Drives: '15 STi Ltd Location: Probably a location near you! Posts: 297 Thanks: 37 Thanked 149 Times in 61 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Quick and dirty math shows a 235/40/18 would be aprox 20mm taller than the stock wheel/tire combo. That would be only a 10mm drop in ground clearance with the RCE Yellows.

03-07-2013, 08:26 PM	#8
Beyer Subaru Senior Member Join Date: Sep 2012 Drives: 2013 BRZ SWP 6AT Ltd Location: Alexandria, VA. Posts: 1,607 Thanks: 859 Thanked 776 Times in 485 Posts Mentioned: 37 Post(s) Tagged: 1 Thread(s)	Yep. @Racecomp Engineering knows what their talking about.

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