R3VLimited Forums

Go Back   R3VLimited Forums > E30 Technical Forums > Suspension & Unsprung > Wheels & Tires

Reply
 
Thread Tools
Old 05-11-2017, 12:42 PM   #9346
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by Helical View Post
Would a 16x7.5 et35 and 16x8.5 et25 size wheel fit and if so, what size tire? Thank you
15mm front spacers needed. 205/50 front and 225/45 rear would look great.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:43 PM   #9347
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by pr0craztinazn View Post
To follow up: Ruff Racing R358s need at least 7mm of spacers to clear the front caliper brackets. I wasn't willing to deal with that because I didn't want a crazy amount of poke, so I sold the wheels. 15x8.5 +17 fitment does not work with this particular wheel.
Great info. Caliper clearance is something no wheel spec can help you decipher, it's all learned in practice. I just put a set of 17s on my car that required me to both grind down the calipers and run a 5mm spacer. Pissed me off as the fitment was perfect otherwise.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:52 PM   #9348
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by dailyrider View Post
Great thread here!

Im looking at running 17x8 +40 and 17x9 +45 with 20mm 4 to 5 lug adapters. I figure the fronts will work perfect but wondering about that extra +5 in the rear and any clearance issues. Im on broadway static 16/18k. Pretty flexible on tire size as well...any recommendations sir?

Thank you!
That's pretty much perfect. I'd go with 205/40 front and 215/40 rear tires for easy fitment. If you really want big tires, 215/40 and 235/40 can work with some rear fender rolling and maybe pulling. I'd go for the stretch, though.

Also, a recommendation on your spring rates that's totally unasked for. That front rate is waaaaayyyyyy too high. The motion ratio of the rear suspension of an E30 means the wheel rate is, in reality, about 60% of the spring rate. The front is close to 100%. This means that in effect, your rear springs are the equivalent of 10K front springs.

I have almost the same coilovers, with a similar suspension setup (Z3M). I have tried an uncountable amount of spring rate combinations, and landed on 10K/18K as perfect. The ride quality difference going from just 12K to 10K was dramatic. There is zero chance of a street tire being able to handle 16K worth of spring, the front of your car will skip and bounce along the roadway rather than absorb the undulation and keep the tire planted. Again, totally uncalled for, but I'm telling you. The best mod you can do is 10 or 12K front springs to re-balance your car and let the front struts actually move.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:53 PM   #9349
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by MrBurgundy View Post
16x8 et20 lowered on H&R race/e90hats.

16/45/??? Don't want to roll the fenders.


edit, down for a mild roll. I really want to run 225s
Needs a rear roll for 225/45/16s.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:53 PM   #9350
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by hexe30 View Post
Looking at some 16x8 +25 bbs wheels. HR/bilstine suspension setup. Would they work and what's the largest tire I could fit. May also in the future do UCC brake setup. Thanks ahead time.
3mm front spacers and 225/45/16 tires.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:56 PM   #9351
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by cwlo View Post
I've got 17x8.5" et40 5 lug kit with e36 hubs front (+12), z4 (+2.5) hubs rear. GC coilovers w/camber plates. What size tire and spacer can I run?

Thanks!
10mm spacers front and rear with 235/40s would work and look great.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:56 PM   #9352
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by cspec View Post
Hey Mystikal, thanks ahead for the help!

Just bought 15x8 +20

What kind of tire size can I run?

Lowered with Vogtland springs and E90 top hats in the front.
No problem. 205/55, 205/50, and 225/45 work without modification. 225/50s require a rear fender roll.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 12:58 PM   #9353
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by randywalters View Post
Those Borbets weren't scraping on the strut housing when cranked to the ends as the sidewall-to-strut tube doesn't change when turning as they both turn together. What was scraping was the inner rim on the end of the swaybar at full lock. BTDT.


If those 15x7 wheels are truly ET27 they will not rub the strut housings since the tube angles further and further away from the sidewall the higher up you go, but that tire is taller than stock and might be tall enough to rub the underside of the front spring perch so you might want to check into that further.

Here's a pic of the strut clearance of my Kosei K1 15x7 ET27 with 225/50-15 Kumho V700 R-compound tires. Note where the spring perch starts angling away from the strut tube above the tread - this is the dimension i'd be concerned about with a taller 205/60 tire.
RANDY EFFING WALTERS

You were the E30 fitment king of bimmer.org, roadfly, etc. I learned so much from your Ronal/Kosei posts back in the 90s. What a surprise to see you stroll in here.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 01:01 PM   #9354
Mystikal
Moderator
Wheel Fitment Expert
 
Mystikal's Avatar
 
Join Date: Nov 2003
Location: Toronto
Posts: 9,571
Quote:
Originally Posted by HoustonF34 View Post
I have an E30 vert with E30 M3 5 lug swap.
Sitting on H&R sport OE springs.
I have camber plates in front set at -3 deg rear is also -3 deg from H&R springs.

I have a set of Style 5s 16x8 et23. Can I run 225 x 50 x16 Bridgestone potoenza re-71r for autox?
No, thanks to the thicker M3 hubs fitment is tight. 225/45 might just barely squeeze by with a rear fender roll.
__________________
Mystikal is offline   Reply With Quote
Old 05-11-2017, 02:21 PM   #9355
HoustonF34
Noobie
 
Join Date: Aug 2015
Location: Houston
Posts: 11
E30 Vert 16x8

Quote:
Originally Posted by Mystikal View Post
No, thanks to the thicker M3 hubs fitment is tight. 225/45 might just barely squeeze by with a rear fender roll.
Thanks, this is a great thing you are doing.

For autox and fitment would you recommend 205/50 Potenza , Dunlop Direzza 225/45 or BFG Rizal S 215/45
HoustonF34 is offline   Reply With Quote
Old 05-11-2017, 03:13 PM   #9356
Staszek
E30 Modder
 
Staszek's Avatar
 
Join Date: May 2006
Location: Chicago IL
Posts: 862
16"x8" ET29. Tires are 225/45R16.

What size spacers front and rear? 1990 325is on H&R Sport.
Staszek is offline   Reply With Quote
Old 05-11-2017, 06:45 PM   #9357
dailyrider
Noobie
 
Join Date: Apr 2015
Location: Wisconsin
Posts: 14
Quote:
Originally Posted by Mystikal View Post
That's pretty much perfect. I'd go with 205/40 front and 215/40 rear tires for easy fitment. If you really want big tires, 215/40 and 235/40 can work with some rear fender rolling and maybe pulling. I'd go for the stretch, though.



Also, a recommendation on your spring rates that's totally unasked for. That front rate is waaaaayyyyyy too high. The motion ratio of the rear suspension of an E30 means the wheel rate is, in reality, about 60% of the spring rate. The front is close to 100%. This means that in effect, your rear springs are the equivalent of 10K front springs.



I have almost the same coilovers, with a similar suspension setup (Z3M). I have tried an uncountable amount of spring rate combinations, and landed on 10K/18K as perfect. The ride quality difference going from just 12K to 10K was dramatic. There is zero chance of a street tire being able to handle 16K worth of spring, the front of your car will skip and bounce along the roadway rather than absorb the undulation and keep the tire planted. Again, totally uncalled for, but I'm telling you. The best mod you can do is 10 or 12K front springs to re-balance your car and let the front struts actually move.


Huge thanks man. Great info. I ended up with a different set of wheels. Work 17x8/9 et 35 with 18mm adapters. Put 235/40 on the rear and 215/45 on the front...cause I nerded out about matching sidewalk height. Front clear with the roll and pull but I rub on the front of the wheel well. Rear is just about perfect. Going to try 215/40.

And yeah man no joke on the spring rates. Bouncy as fuuuug. I will be looking into your recommendation for sure.

Thanks again!


Sent from my iPhone using Tapatalk
__________________
Current Rides:
91 318is S50swap
94.5 F250 7.3 Dana 60 Swap/SD spring swap
99 VFR800 Street Fighter
2002 DRZ400e...Titled
2007 DR650 Supermoto (WIP)
1981 XS650 Choppaaaa (WIP)
dailyrider is offline   Reply With Quote
Old 05-19-2017, 04:00 PM   #9358
Idrisu
Advanced Member
 
Join Date: Jul 2015
Location: Georgia
Posts: 104
Will this require spacers to clear the caliper?
front: bbs rs 039 16x7 et24
rear: bbs rs 040 16x8 et24
Idrisu is offline   Reply With Quote
Old 05-23-2017, 01:26 PM   #9359
rob0589
Noobie
 
Join Date: May 2017
Location: New York
Posts: 10
I am currently purchasing esm 002's staggered 16x8 F(20 offset) 16x9 R(15 offset). What size tires are my best bet. Also, do i need spacers for the fronts or rears?
rob0589 is offline   Reply With Quote
Old Yesterday, 04:05 PM   #9360
parkerbink
R3V OG
 
parkerbink's Avatar
 
Join Date: Jun 2004
Location: I fart in your general direction.
Posts: 7,676
Send a message via AIM to parkerbink Send a message via MSN to parkerbink Send a message via Yahoo to parkerbink
How well will these fit on a mostly stock '92 e30 Cabrio? 16x7 +30 4x100 Sparco Terra with 215/50-16 Dunlop Direzza DZ102.
__________________
parkerbink is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 01:38 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2004 - 2020 R3VLimited LLC