BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      06-01-2018, 09:54 AM   #1
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Which rim width is better for a 255 RE71R up front: 8.5" or 9"

I have a set of 4 APEX ARC8 17x8.5 42 mm offset rims and just took delivery of a set of 4 ForgeStar F14 17x9 50 mm offset (I think a 12mm spacer would be needed up front) and a set of 255-40 RE71Rs for autocross and was wondering which rim width would be better for the front? The front tires are mounted on the APEX rims which rub a little on dips on the street, but it's livable and the rims/tires aren't my DD setup. If the 9" rims would be better for the tire/traction then I can have them swapped when I get the correct spacers. I'm using the 9" rims for the rear so I can play with the spacing of the front.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 1
AndyW650.00
      06-01-2018, 11:18 AM   #2
Ginger_Extract
California-bound
Ginger_Extract's Avatar
United_States
383
Rep
1,480
Posts

Drives: BMW 135i
Join Date: Jan 2013
Location: Los Angeles, CA

iTrader: (3)

The wider wheel will be faster.
__________________
Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 |||| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17
Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 |||| Buttonwillow #13 (CW): 1:59.3 1/27/18
https://www.facebook.com/JakeStumphRacing |||| http://www.youtube.com/user/RaceMeMZ3
Appreciate 2
BimmerAg425.00
JPuehl101.00
      06-01-2018, 11:41 AM   #3
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Quote:
Originally Posted by Ginger_Extract View Post
The wider wheel will be faster.
Thanks, that's exactly what I wanted to know.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      06-01-2018, 10:55 PM   #4
AndyW
Supreme Galactic Commander (one galaxy over...)
AndyW's Avatar
United_States
650
Rep
1,771
Posts

Drives: '08 E93, '12 E82, '13 E93 M3
Join Date: Feb 2012
Location: Washington, USA

iTrader: (5)

Quote:
Originally Posted by JPuehl View Post
I have a set of 4 APEX ARC8 17x8.5 42 mm offset rims and just took delivery of a set of 4 ForgeStar F14 17x9 50 mm offset (I think a 12mm spacer would be needed up front) and a set of 255-40 RE71Rs for autocross and was wondering which rim width would be better for the front? The front tires are mounted on the APEX rims which rub a little on dips on the street, but it's livable and the rims/tires aren't my DD setup. If the 9" rims would be better for the tire/traction then I can have them swapped when I get the correct spacers. I'm using the 9" rims for the rear so I can play with the spacing of the front.
Wow...255 on the front...what kind of camber are you running?
__________________
Best,
Andy

'12 E82-PS2,Stoptechs,Clubsports+M3 bits,Accusump,Wagner DP+EVO III FMIC,ERCP,BMS Intake,Mason Strut Bar,Wedge Tune
Appreciate 0
      06-03-2018, 05:58 AM   #5
mabrahams
First Lieutenant
74
Rep
318
Posts

Drives: X1 M-Sport 28i
Join Date: Dec 2010
Location: Fl

iTrader: (0)

Quote:
Originally Posted by AndyW View Post
Wow...255 on the front...what kind of camber are you running?
255s fit on stock suspension (17x8.5) and stock camber as well. Depending on ride height and suspension, no problems.
Appreciate 1
AndyW650.00
      06-04-2018, 09:42 AM   #6
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Quote:
Originally Posted by AndyW View Post
Wow...255 on the front...what kind of camber are you running?
Right now I have 3.3* and have the 255's for street and race mounter on 8.5" rims. I'll be moving the race tires to a 9" rim after I adjust the camber to 3.5* and get a 12mm spacer. The top of the front tires tuck under the fenders and don't rub, except if I hit a hard bump or a fast dip in the road.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      06-04-2018, 01:38 PM   #7
lowside67
First Lieutenant
219
Rep
361
Posts

Drives: 2011 BMW 128i
Join Date: Apr 2015
Location: Vancouver, Canada

iTrader: (0)

Quote:
Originally Posted by mabrahams View Post
255s fit on stock suspension (17x8.5) and stock camber as well. Depending on ride height and suspension, no problems.
Without dragging this thread off the deep end, I wanted to comment on this as I do not believe this is correct. It might bolt up, and might not have any problems under normal operation since the stock ride height has so much gap, but if a person was to drive the car hard enough that they compressed the suspension heavily (track days, etc) it would obliterate the fender when it made contact.

A 255 RE71R is a BIG tire and is the absolute limit of what fits well under stock fenders - with 3.2 degrees of camber it BARELY fits at a low ride height (which is exactly what happens when you compress the soft stock springs).

-Mark
__________________
Appreciate 0
      06-04-2018, 03:19 PM   #8
R1wheelieforfun
Private
18
Rep
91
Posts

Drives: 2005 BMW M3
Join Date: Apr 2014
Location: Boston MA

iTrader: (0)

Quote:
Originally Posted by lowside67 View Post
Without dragging this thread off the deep end, I wanted to comment on this as I do not believe this is correct. It might bolt up, and might not have any problems under normal operation since the stock ride height has so much gap, but if a person was to drive the car hard enough that they compressed the suspension heavily (track days, etc) it would obliterate the fender when it made contact.

A 255 RE71R is a BIG tire and is the absolute limit of what fits well under stock fenders - with 3.2 degrees of camber it BARELY fits at a low ride height (which is exactly what happens when you compress the soft stock springs).

-Mark
I can agree with this. I was running a ARC8 8.5" wide wheel with a RE71 (245) up front. -3.2* camber, and my front fenders were rubbing (at times heavily) under compression or steering lock. I'm on a Bilstein/Eibach street kit, lowered but not by much. I forget the exact spec on the suspension, but that 255 might get a bit chunked up in the front under some circumstances.

Good luck!
Appreciate 0
      06-04-2018, 05:11 PM   #9
mKilgore
Second Lieutenant
170
Rep
215
Posts

Drives: F82 M4
Join Date: Aug 2017
Location: Nashville, TN

iTrader: (1)

I have had similar dealings as mentioned. I ran 245 Hankook RS4s on 17x8.5 EC-7s up front. On stock suspension, I would get a minor bit of rubbing on the outside shoulder under heavy compression on the street. The inside of the rim/tire was also *extremely* close to the shock tower and I think there was a slight bit of rubbing there too. Had I tracked the car in this condition, I would have been rubbing for sure. It would not have been anything to completely destroy a tire or the fender, but it would have been rubbing nonetheless.

I added Dinan camber plates and it resolved the rubbing issue on the outside shoulder. No rubbing even under the heaviest compression. I then added a 3 ml Apex spacer just for piece of mind and still no rubbing on the inside or outside.

A 255 "may" fit depending on the tire construction, but you're really getting to the limits without using an adjustable suspension and camber plates.
Appreciate 0
      06-04-2018, 06:38 PM   #10
mabrahams
First Lieutenant
74
Rep
318
Posts

Drives: X1 M-Sport 28i
Join Date: Dec 2010
Location: Fl

iTrader: (0)

Quote:
Originally Posted by lowside67 View Post
Without dragging this thread off the deep end, I wanted to comment on this as I do not believe this is correct. It might bolt up, and might not have any problems under normal operation since the stock ride height has so much gap, but if a person was to drive the car hard enough that they compressed the suspension heavily (track days, etc) it would obliterate the fender when it made contact.

A 255 RE71R is a BIG tire and is the absolute limit of what fits well under stock fenders - with 3.2 degrees of camber it BARELY fits at a low ride height (which is exactly what happens when you compress the soft stock springs).

-Mark
Hi Mark,

Sorry; I did not state RE71s but ran 255 Falken 615K Gen 1 on Kosei K1 17x8.5 for AutoX with no rubbing on stock suspension.

I am currently running 17x9 RE71s with around the same camber at not a low ride height (JRZ RS2) and have no problems.

Maybe you guys are just running the car harder than me.
Appreciate 0
      06-04-2018, 07:34 PM   #11
tracer bullet
Brigadier General
tracer bullet's Avatar
United_States
2288
Rep
3,461
Posts

Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

iTrader: (1)

A possibly shorter sidewall height (if that's the case) will help a little, and coilovers with stiffer than stock springs will help as well. Still I'm a bit amazed at 255 after everything I've read and even what I've seen on my own car.

The 255 might fit for you but I'd consider yourself very lucky! Most people try quite hard without success, you've got the right combo for sure.
Appreciate 0
      06-05-2018, 10:20 AM   #12
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Two weekend ago I had the 255-40 17 RE71Rs mounted on my ARC8 8.5 rims up front and have been driving around with them since. I'm trying to get a few miles on the tires before the first autocross event with them this coming weekend. I do on occasion get a little rub on the front bump "tab" but that's it. That's on Swift Spec R springs and -3.3* camber. My DD rims are a square set of the OEM 18x8.5 with a 10mm spacer in from with 255-35 tires and no rub. I plan to go to -3.5* up front and when the 12.5mm spacer arrives mount the front tires on the 17x9" 50 mm offset rims I currently have on the back. I already test fitted them on the front and didn't have any rub when driving around the neighbor and the RE71Rs will just be used for autocross.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      06-05-2018, 12:11 PM   #13
lowside67
First Lieutenant
219
Rep
361
Posts

Drives: 2011 BMW 128i
Join Date: Apr 2015
Location: Vancouver, Canada

iTrader: (0)



That's a 255 RE71R on a 17x9 +35 with -3.6 degrees camber (including longer lower control arms similar to the ///M arms). As you can see, it's pretty damn tight. I also do not have any room to go to a higher offset (closer to the strut) without the tire touching the strut - Ohlins R&T.

-Mark



__________________
Appreciate 2
Yeineken1297.50
AndyW650.00
      06-19-2018, 10:40 AM   #14
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Not to drag out my own thread but just wanted to share what I have for others reference.

I can say that a RE71R in 255x40x17 on a 17"x9" with 50mm offset and a 12.5mm spacer does fit with minimal rubbing on the bumper tabs on hard bumps. They actually rub much less than when mounted on the 17"x8.5" with 42mm offset. I have -3.3* camber using Ground Control Street Camber plates and the M3 control arm bits. I have Swift Spec R springs with a 1/2" spacer up front.

I went with a square 17"x9"x50mm setup so I can rotate the tires front to rear. I get no rubbing when auto-crossing my car. I also no longer get any rubbing in the rear and don't have my fenders rolled. I went with ForgeStar rims and so far are happy with them even tho they seem to be about 2 lbs heavier that the 8.5" Apec ARC8 rims I switched from (and most likely will be selling soon).
Attached Images
    
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      06-21-2018, 08:54 AM   #15
spxxx
Boost
spxxx's Avatar
1349
Rep
3,689
Posts

Drives: 135i M-Sport
Join Date: Feb 2014
Location: Valley of Silicon, CA - United States

iTrader: (9)

Apex 18x9 et42 with 255/265 ran fine for me with a slight drop & -3* camber.

The rear, not so much, need something closer to et50 out back with 9in wide wheels and et60 with 9.5s
__________________
F80 M3 TrackBoi, Z4MC GarageBoi, 1M Clone StreetBoi
Appreciate 0
      06-25-2018, 03:11 PM   #16
berns
Captain
1557
Rep
672
Posts

Drives: '07 E90 335i
Join Date: Feb 2013
Location: Los Angeles, CA

iTrader: (1)

I have two Hyper Silver 18x9 +42 ARC8's for sale if you're interested. I've used them up front for bother 255s and 265s. PM me if you'd like.
Appreciate 0
      06-25-2018, 10:16 PM   #17
John_01
Colonel
John_01's Avatar
Australia
232
Rep
2,643
Posts

Drives: E90 325i, E82 135i
Join Date: Mar 2009
Location: Sydney, Australia

iTrader: (0)

How much strut clearance do you have with 17x9 et50 and 12.5mm spacer? The setup looks great, BTW.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 02:27 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST