Wheel Gap & Wheel Size - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

white_knight · 01-25-2013, 06:49 PM

I'm not the most cluey on these things so was hoping if someone can please confirm if wheel size affects the wheel gap, specifically when lowering?

Is there a formula that can work out the final wheel gap given suspension height and wheel size?

I'm thinking of rockin' 18"/8.75" with 235/40/18 and installing the Eibach Pro Kit.

While I would love to get the Sportline, I don't want the hassles that come with such a drop (scrapes/discomfort). I'm hoping getting the 18"s will close the gap even more.

df.dima · 01-25-2013, 10:05 PM

Simply going to 18s would not "close the gap", it depends on the tire size you choose. I personally like this calculator: http://www.miata.net/garage/tirecalc.html

Taller tires will "close the gap", but will throw the speedo off as well. The size you mention is almost 1" taller (actually 245/35 would be closer to stock height), so with Pro kit, you will close the gap a bit by 1" +0.5" (half of total tire size increase). I think it's a bit too much of a difference in tire size.

JoeBoxer · 01-26-2013, 01:43 AM

I ran 235/40 all around on that same size and verified speedo was still accurate, if anything its off stock. Check my build thread or the wheel gallery and you can see it, closes the gap very nicely but still no scraping or rubbing.

H Tech springs but you get the idea
http://www.ft86club.com/forums/showp...1&postcount=49

white_knight · 01-26-2013, 02:46 AM

Hey Joe, what drop have you got?

JoeBoxer · 01-26-2013, 03:17 AM

Quote:

Originally Posted by white_knight

Hey Joe, what drop have you got?

Tein H Tech springs right now, probably changing out to Eibach coilovers or GC in a couple months though.

white_knight · 01-26-2013, 05:14 AM

Sorry, meant to ask how much lower is it with those springs?

JoeBoxer · 01-26-2013, 10:35 AM

Quote:

Originally Posted by white_knight

Sorry, meant to ask how much lower is it with those springs?

1" front, .8" rear

Wish i had went lower in the back but was trying to keep from having to buy camber correction parts, it didn't matter my car was out stock.

cruzinbill · 01-26-2013, 11:01 AM

Quote:

Originally Posted by JoeBoxer

Tein H Tech springs right now, probably changing out to Eibach coilovers or GC in a couple months though.

*sigh* shoulda got the Cusco Zero-3X's

01-25-2013, 06:49 PM	#1
white_knight Senior Member Join Date: Jul 2012 Drives: 2013 86 GTS - Pegasus White Location: Sydney, AU Posts: 237 Thanks: 88 Thanked 103 Times in 53 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Wheel Gap & Wheel Size I'm not the most cluey on these things so was hoping if someone can please confirm if wheel size affects the wheel gap, specifically when lowering? Is there a formula that can work out the final wheel gap given suspension height and wheel size? I'm thinking of rockin' 18"/8.75" with 235/40/18 and installing the Eibach Pro Kit. While I would love to get the Sportline, I don't want the hassles that come with such a drop (scrapes/discomfort). I'm hoping getting the 18"s will close the gap even more.

01-25-2013, 10:05 PM	#2
df.dima Senior Member Join Date: May 2012 Drives: FR-S and Mazda 3 Sky Location: Kitchener, ON Posts: 343 Thanks: 10 Thanked 132 Times in 93 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Simply going to 18s would not "close the gap", it depends on the tire size you choose. I personally like this calculator: http://www.miata.net/garage/tirecalc.html Taller tires will "close the gap", but will throw the speedo off as well. The size you mention is almost 1" taller (actually 245/35 would be closer to stock height), so with Pro kit, you will close the gap a bit by 1" +0.5" (half of total tire size increase). I think it's a bit too much of a difference in tire size. Last edited by df.dima; 01-25-2013 at 11:11 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Size of Centric Hub Ring wheel?	Akired86	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	1	10-08-2012 12:19 AM
Wheel Size vs. Balance	jellygorilla	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	6	09-11-2012 02:23 PM
Wheel Hub Bore Size	feldy	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	4	06-08-2012 01:01 AM
Wheel size and fitment	bsclywilly	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	48	03-27-2012 01:34 PM
Wheel size, what's your opinion?	#87	Off-Topic Lounge [WARNING: NO POLITICS]	4	02-24-2010 04:06 PM

01-26-2013, 01:43 AM	#3
JoeBoxer Senior Member Join Date: Jul 2012 Drives: Whiteout FR-S Location: Arkansas Posts: 4,154 Thanks: 1,666 Thanked 1,627 Times in 997 Posts Mentioned: 72 Post(s) Tagged: 0 Thread(s)	I ran 235/40 all around on that same size and verified speedo was still accurate, if anything its off stock. Check my build thread or the wheel gallery and you can see it, closes the gap very nicely but still no scraping or rubbing. H Tech springs but you get the idea http://www.ft86club.com/forums/showp...1&postcount=49

01-26-2013, 02:46 AM	#4
white_knight Senior Member Join Date: Jul 2012 Drives: 2013 86 GTS - Pegasus White Location: Sydney, AU Posts: 237 Thanks: 88 Thanked 103 Times in 53 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Hey Joe, what drop have you got?

01-26-2013, 05:14 AM	#6
white_knight Senior Member Join Date: Jul 2012 Drives: 2013 86 GTS - Pegasus White Location: Sydney, AU Posts: 237 Thanks: 88 Thanked 103 Times in 53 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Sorry, meant to ask how much lower is it with those springs?

User Name		Remember Me?
Password