Welcome to the North American Subaru Impreza Owners Club Thursday July 2, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Tire & Wheel Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Tire & Wheel

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-07-2008, 03:20 PM   #1
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default Track and AutoX Wheel Research

I am looking for help selecting a conservative dedicated wheel and tire option for track and AutoX use – HOBBY ONLY
I already have 18x7.5 BBS RGR street use wheels that clear my Wilwoods fine.

Basics:
- 2005 WRX with Ohlins Fixed Perch Struts / RCE blacks / Wilwood 12.9 – 6pot front with a Wilwood 12.2 – 4pot rear
Group N rear top hats and RCE lowering camber plate fronts (on back order…stock fronts for now)
- 6GunRacing front 5x100 HUB conversion coming
- PPG semi-close ratio 1-4 helical-cut synchronized gearset and diff upgrades coming
- No spacers allowed per me….seems to lock me into the following ---
- A 245 or 255 tire width limit – trading weight consideration for width
- 8.5” wheel width limit – for more options and weight considerations

Wheel Options:

1. Buddy Club P1 Racing QF Wheel 17x8.5, 5x100 45ET $493.00
2. Advan Super Ver.2 Wheel 17x8.5, 5x100 45ET $562.49
3. Gram Lights 57 Optimise Wheel 17x8.5 5x100 43ET $446.49
4. Volk Racing CE28N Wheel 17x8.5 5x100 40ET $565.19
5. BBS CH Wheel 17x8.5 5x100 35ET $449.99
6. Enkei RPF1 17x8 5x100 45ET $225
7. TR Motorsports 17x8.5 48ET $269

Tires:
BF Goodrich R1’s at 255/40 17 which are 24.8 inch diam compared to stock 24.9 inch diam and offer 10.2 inches of width. Comp to stock this tire should be about .5” closer to the strut and 1.5” closer to the fender at the 40 offset and .3” closer to the strut and 1.7” closer to the fender at the 35 offset.

more tire info later in thread


Is my thinking straight here at all?
* Registered users of the site do not see these ads.

Last edited by jmhubbard01; 07-08-2008 at 11:51 AM. Reason: added wheel options
jmhubbard01 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-07-2008, 03:59 PM   #2
Mechie3
Scooby Guru
 
Member#: 120152
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Indy
Default

Consider the Enkei RPF-1's. They're relatively inexpensive (~$1K for a set of 4 in 17x8) and pretty lightweight (~15.6 lbs IIRC). The RPF-1's seem to be a popular choice in the local AX circuit. I like the Kumho V710's on my RPF-1's for AX use.
Mechie3 is offline   Reply With Quote
Old 07-07-2008, 04:13 PM   #3
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

^ I could only find up to 8" in width on those for 5x100 fitment. What offset and what size tire are you running on yours?

I really like those wheels for track use though.
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 04:24 PM   #4
REX8
*** Banned ***
 
Member#: 24038
Join Date: Sep 2002
Chapter/Region: South East
Location: Godspeed Cale...
Default

Quote:
Originally Posted by jmhubbard01 View Post
^ I could only find up to 8" in width on those for 5x100 fitment. What offset and what size tire are you running on yours?

I really like those wheels for track use though.
Is the .5" difference worth the $ to you?
REX8 is offline   Reply With Quote
Old 07-07-2008, 04:25 PM   #5
Mechie3
Scooby Guru
 
Member#: 120152
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Indy
Default

Not sure of my offset offhand (it falls within the acceptable ranges in the FAQ's for an 8" rim). I run 245/45/17 V710's.

Mechie3 is offline   Reply With Quote
Old 07-07-2008, 04:29 PM   #6
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Quote:
Originally Posted by REX8 View Post
Is the .5" difference worth the $ to you?
Depends I guess...Is the question really "Is 245 vs 255 really worth it?"
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 04:33 PM   #7
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Quote:
Originally Posted by Mechie3 View Post
Not sure of my offset offhand (it falls within the acceptable ranges in the FAQ's for an 8" rim). I run 245/45/17 V710's.
thanks for the info! you probably have the 45 offset then, not the 35. nice car and nice setup too!
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 04:33 PM   #8
Back Road Runner
Scooby Guru
 
Member#: 60082
Join Date: Apr 2004
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2004 Forester STI
Silver

Default

You'll also want to weigh your relative driving skill and if it's even worth fretting over minor aspects that may only give a tiny boost in over grip or responsiveness. Weigh your options and weigh their relative worth overall.
Back Road Runner is offline   Reply With Quote
Old 07-07-2008, 04:39 PM   #9
nhat
Scooby Guru
 
Member#: 140163
Join Date: Feb 2007
Chapter/Region: MAIC
Location: 3MI Racing
Vehicle:
03 STi
hellaflunctional

Default

what about ssr? there's the new type f-rs and the old gt2.

or rotas!
nhat is offline   Reply With Quote
Old 07-07-2008, 04:40 PM   #10
WRX8XB
Scooby Guru
 
Member#: 45323
Join Date: Oct 2003
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
MY05 Impreza WRX STi
Pastelito Racing & SFSOC

Default

the Enkei RPF1s in a 17x8 are a +45mm offset.
WRX8XB is offline   Reply With Quote
Old 07-07-2008, 04:53 PM   #11
REX8
*** Banned ***
 
Member#: 24038
Join Date: Sep 2002
Chapter/Region: South East
Location: Godspeed Cale...
Default

Quote:
Originally Posted by jmhubbard01 View Post
Depends I guess...Is the question really "Is 245 vs 255 really worth it?"
Not sure what that means. You can easily run a 255 on an 8" wheel. No problem at all.
REX8 is offline   Reply With Quote
Old 07-07-2008, 04:57 PM   #12
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Quote:
Originally Posted by Back Road Runner View Post
You'll also want to weigh your relative driving skill and if it's even worth fretting over minor aspects that may only give a tiny boost in over grip or responsiveness. Weigh your options and weigh their relative worth overall.
My skills you say! Well pal.... they don't exist yet. I will be tightening that nut first though before anything even Hobby-serious occurs on a track.

I am just trying to make good decisions (and feed my obsession with the proper levels of rationalization) along the way.

I will be racing in a class way above my skills and base car more than likely, but do want to at least be able to be competitive on a local level. From what I have been reading even in ESP (not where I will be) 275's are common. I am just not sure I want to be capable of accommodating those sizes with my also street fun car. Maybe being able to accommodate huge widths on wide wheels won't mess with the normal street use of the car. I honestly don't know. But I do know that 9"+wide options for my 5x100 hubs are very very limited. Well, to get back on track...

Thanks for the feedback and I will continue to live and learn on this issue I guess.

Probably makes sense to start off with the Enkei's and see how things pan out.
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 04:59 PM   #13
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Quote:
Originally Posted by REX8 View Post
Not sure what that means. You can easily run a 255 on an 8" wheel. No problem at all.
OK cool. The charts from the manufacturers wanted a wider wheel for that width but you are probably talking from experience. Thanks!
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 05:18 PM   #14
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Quote:
Originally Posted by WRX8XB View Post
the Enkei RPF1s in a 17x8 are a +45mm offset.
There is a 35 offset available for the 5x100 which would push almost all of the extra width of the 255s to the fender relative to my RGR's which clear only by about 3/8" to the struts in the rear with -1.5 camber. I think it's tight due to the RGR's high (+48) offset.

How big a deal would a 35 offset be for track dedicated wheels; and is the bearing wear problem with low offsets more of an issue with the fronts or equal for all four wheels.
jmhubbard01 is offline   Reply With Quote
Old 07-07-2008, 05:49 PM   #15
Mechie3
Scooby Guru
 
Member#: 120152
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Indy
Default

You can run 275's on 8" wheels too. You'll need a super stiff setup as the tires simply just don't fit in the fender wells no matter how much rolling/pulling you do.
Mechie3 is offline   Reply With Quote
Old 07-07-2008, 08:52 PM   #16
REX8
*** Banned ***
 
Member#: 24038
Join Date: Sep 2002
Chapter/Region: South East
Location: Godspeed Cale...
Default

Quote:
Originally Posted by jmhubbard01 View Post
OK cool. The charts from the manufacturers wanted a wider wheel for that width but you are probably talking from experience. Thanks!
Assuming you're talking about something pretty stiff, like an R-comp or max-performance summer tire, 255's on an 8" wheel are just fine.

I've run RA1's, A032 and 48, and RT615's. All feel perfectly fine, I'm sure to some degree they'd feel better on a wider wheel, but they had quick enough turn in where you won't think anything is wrong.

For the kind of $$$ you'd be saving...I'd think it certainly would be wroth it.
REX8 is offline   Reply With Quote
Old 07-07-2008, 09:27 PM   #17
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Good deal thanks Rex8.

I can get some good pricing on both ET35 and ET45 RFP1's. Anyone know definitively whether I can get at least -1.5 camber on the rears with a 45 offset running 255's? And/or will the 35 offset be ok for an occasional track autox only wheel?

Last edited by jmhubbard01; 07-07-2008 at 10:30 PM.
jmhubbard01 is offline   Reply With Quote
Old 07-08-2008, 09:11 AM   #18
WRX8XB
Scooby Guru
 
Member#: 45323
Join Date: Oct 2003
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
MY05 Impreza WRX STi
Pastelito Racing & SFSOC

Default

a 255 will perform better on a wider wheel, no question.

pinching the tire on the wheel will reduce the overall width of the tire.

you may have more maximum grip than a smaller tire, but the response will be slower.

it's obviously a trade off.

255 is a good match for an 8.5" wheel.
WRX8XB is offline   Reply With Quote
Old 07-08-2008, 09:14 AM   #19
WRX8XB
Scooby Guru
 
Member#: 45323
Join Date: Oct 2003
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
MY05 Impreza WRX STi
Pastelito Racing & SFSOC

Default

Quote:
Originally Posted by jmhubbard01 View Post
There is a 35 offset available for the 5x100 which would push almost all of the extra width of the 255s to the fender relative to my RGR's which clear only by about 3/8" to the struts in the rear with -1.5 camber. I think it's tight due to the RGR's high (+48) offset.

How big a deal would a 35 offset be for track dedicated wheels; and is the bearing wear problem with low offsets more of an issue with the fronts or equal for all four wheels.
personally I'd stick with the +45 and a 245 tire, going to the +35mm will create more fitment issues forcing you to do fender work and run a good amount of rear camber.

lots of rear camber isn't exactly ideal for autox.

i wouldn't worry about bearing wear if they were track/autox only wheels (until you had upwards of 90k miles on the car anyway).
WRX8XB is offline   Reply With Quote
Old 07-08-2008, 10:50 AM   #20
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

All things considered -

I am nearly sure that I will be going with the Enkei RPF1 17x8 ET45 or TR MT1 17x8.5 ET48 with one of the following tires -

Current Options: (stock tires have a 24.9 inch diam.)
with current wrx gearing there could be a benefit to a smaller diam. package. After semi-close PPGs are in though...

data from TR's website. i noticed one minor variances from mnf. website but for consistency I just used TR's data > also not all mnf. offered all width variables so I picked the one that all offered, namely section width.

a. BFG R1's at 245/40-17 which has a 24.2 inch diam. and 9.8 section width
b. BFG R1's at 255/40-17 which has a 24.8 inch diam. and 10.2 section width
b. Kuhmo V710 at 245/45-17 which has a 25.4 inch diam. and 9.6 inch section width
b. Kuhmo V700 at 255/40-17 which has a 24.8 inch diam. and 10.6 inch section width
d. Hoosier A6 at 245/40-17 which has a 24.5 inch diam. and 10 inch section width
e. Advan A048 at 245/40-17 which has a 24.8 inch diam. and 9.8 inch section width
f. Advan A048 at 255/40-17 which has a 25 inch diam. and 10.3 inch section width
g. Toyo R888 at 255/40-17 which has a 25.1 inch diam. and 10.4 inch section width
h. Toyo R888 at 245/40-17 which has a 24.7 inch diam. and 9.8 inch section width


and even though these may be apples to oranges the consensus is that it is best to learn on street tires

q. Dunlop DS Z1 SS at 245/40-17 which has a 24.7 inch diam. and 9.8 inch section width
r. Dunlop DS Z1 SS at 255/40-17 which has a 25 inch diam. and 10.4 inch section width
s. Bridgestone RE-01 at 245/40-17 which has a 24.7 inch diam. and 9.8 inch section width
t. Bridgestone RE-01 at 255/40-17 which has a 25 inch diam. and 10.3 inch section width
u. Kook Z212 at 245/40-17 which has a 24.7 inch diam. and 9.8 inch section width

Last edited by jmhubbard01; 07-09-2008 at 09:49 AM.
jmhubbard01 is offline   Reply With Quote
Old 07-08-2008, 10:56 AM   #21
WRX8XB
Scooby Guru
 
Member#: 45323
Join Date: Oct 2003
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
MY05 Impreza WRX STi
Pastelito Racing & SFSOC

Default

you wont find a tire that wins nationally at both the track and autox.

you'll have to find a middle ground you're happy with.

the V710 is a great autox tire

the A048 is a great track tire

A048 will still do better than a street tire at autox (when warm).

the Dunlop Z1 Star Specs should do well at both track/autox.

you're going to be in SM right?
WRX8XB is offline   Reply With Quote
Old 07-08-2008, 10:58 AM   #22
nhat
Scooby Guru
 
Member#: 140163
Join Date: Feb 2007
Chapter/Region: MAIC
Location: 3MI Racing
Vehicle:
03 STi
hellaflunctional

Default

have you taken a look at the trmotorsports mt-1 wheel? you'll find it listed as an 04 sti fitment.

17x8.5 +48 and 17.5lbs for only $269/per.
nhat is offline   Reply With Quote
Old 07-08-2008, 11:04 AM   #23
WRX8XB
Scooby Guru
 
Member#: 45323
Join Date: Oct 2003
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
MY05 Impreza WRX STi
Pastelito Racing & SFSOC

Default

Quote:
Originally Posted by nhat View Post
have you taken a look at the trmotorsports mt-1 wheel? you'll find it listed as an 04 sti fitment.

17x8.5 +48 and 17.5lbs for only $269/per.
+1, good fitment for subies.
WRX8XB is offline   Reply With Quote
Old 07-08-2008, 11:10 AM   #24
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

Quote:
Originally Posted by nhat View Post
have you taken a look at the trmotorsports mt-1 wheel? you'll find it listed as an 04 sti fitment.

17x8.5 +48 and 17.5lbs for only $269/per.
+2. I have them with 255/40-17 R888's. Very nice wheel for the $$.
mav1c is online now   Reply With Quote
Old 07-08-2008, 11:14 AM   #25
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: International
Location: fantasy island
Vehicle:
2003 ...
grey

Default

Hm, that's Tire Rack's wheel isn't it nhat? I will check it out. I know that some folks on the Bimmer forums (past life) have spoken positively about that wheel for the money...
jmhubbard01 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to DE, where's the tracks and autox? CincinnatiKid Mid Atlantic Impreza Club -- MAIC 8 05-08-2010 02:59 PM
which is better for track and autox Kenji815 Tire & Wheel 10 08-09-2005 11:57 AM
Open Track and AutoX in Japan feropont Motorsports 3 08-04-2005 03:30 PM
FS: Track/AutoX wheels and tires mav1c Mid Atlantic Impreza Club -- MAIC 35 11-05-2003 03:14 PM
Wagon, DMS, How wide can the rims be ?. Track and AutoX Branwell Brakes, Steering & Suspension 3 09-17-2001 07:48 AM


All times are GMT -4. The time now is 11:21 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.