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Old 01-19-2007, 02:34 AM   #1
humbleRex
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Default tires for 17*7.5 +42

its a pcd 100+114.3. i will be lowering with espelir or s tech springs. so what is the max size i can go without rubbing? i have no idea what all these offset is about
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Old 01-19-2007, 08:00 AM   #2
mav1c
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You obviously don't know what offset is all about, because +42 on a 17x7.5 is too low for a Subie. +48 would be more like it. If you keep those wheels, I'd say a 225/45-17 is the most you'd get away with, but you may have to run a 215/45-17.
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Old 01-19-2007, 08:02 AM   #3
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Oh yeah, try this too:
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Old 01-19-2007, 04:41 PM   #4
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Quote:
Originally Posted by mav1c View Post
You obviously don't know what offset is all about, because +42 on a 17x7.5 is too low for a Subie. +48 would be more like it. If you keep those wheels, I'd say a 225/45-17 is the most you'd get away with, but you may have to run a 215/45-17.
too low as in? i bought 225/45/17 and using it now. any possible effects?
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Old 01-19-2007, 04:54 PM   #5
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Quote:
Originally Posted by humbleRex View Post
too low as in? i bought 225/45/17 and using it now. any possible effects?
....too low as in you'll likely have clearance issues. With the +42, you have a surplus of space inboard (i.e. between the strut and tire) but limited space outboard (between the fender and tire). That's why Mav mentioned that a +48 wheel in that width would be more suitable for your car.

.....and you may also want to add "springs" to your search before pulling the trigger on a set.
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Old 01-19-2007, 10:31 PM   #6
humbleRex
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Originally Posted by Kean View Post
....too low as in you'll likely have clearance issues. With the +42, you have a surplus of space inboard (i.e. between the strut and tire) but limited space outboard (between the fender and tire). That's why Mav mentioned that a +48 wheel in that width would be more suitable for your car.

.....and you may also want to add "springs" to your search before pulling the trigger on a set.
+48 offset is in terms of the width of the wheel? i have no rubbing issue now and i had ask the mechanic whether or not there will be rubbing issue when lowered, his reply is no
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Old 01-19-2007, 11:18 PM   #7
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the width of the wheel is the 7.5. the offset is the distance from its hub mounting surface to the centerline of the wheel (if looking from the front or rear of the car).

http://www.tirerack.com/wheels/tech/...jsp?techid=101

the lower the offset, the closer it is to your fender. If he says it wont then make sure he gaurantees it or he wont charge you.
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Old 01-19-2007, 11:38 PM   #8
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....you first need to understand what "offset" is. This link should help:

http://www.tirerack.com/wheels/tech/...jsp?techid=101

They also briefly discuss the importance of a "correct" offset (i.e. typically what your OEM wheels would be). Without diving into detail (which has already been discussed at length in several other threads), the goal is to stay as close to the stock offset as possible when moving to a wider wheel. With our cars, this means you want just enough clearance between the tire and the strut. Add too much (like your +42 7.5's) and you will be limited to the tires you can use due to possible rubbing issues with the fender. ......the reverse can also be true which is why Mav mentioned +48 as a more "ideal" offset for that width of wheel. If you currently have those wheels installed on the car, go check for yourself. Compare the room you have both inboard (between the strut and tire) and outboard (between the tire and fender). A +48 offset would bring the whole wheel/tire inward (toward the strut) and give you more "fender room".

EDIT: I was typing a response and had to leave my desk for a few minutes. ......I didn't see your repsonse Drux until I hit "post reply". .....ooops.

Last edited by Kean; 01-19-2007 at 11:41 PM. Reason: took too long to post
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Old 01-20-2007, 01:01 AM   #9
humbleRex
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with the tires 225/45/17 on now, i realise the gaps is reduced as compared to the stock wheel but not my ideal height. it seems like i cant lower it much (maybe 1.5 finger most?) i want a lowered look (like on tein s tech) and if in my case, what options do i have other than rolling fenders?what is the use for spacers? can they help?
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Old 01-20-2007, 04:22 AM   #10
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Quote:
Originally Posted by humbleRex View Post
with the tires 225/45/17 on now, i realise the gaps is reduced as compared to the stock wheel but not my ideal height. it seems like i cant lower it much (maybe 1.5 finger most?) i want a lowered look (like on tein s tech) and if in my case, what options do i have other than rolling fenders?what is the use for spacers? can they help?
.....it all depends on the tire and how much space you have. Rolling the fenders may work if you find it's a bit too tight. As for spacers, they will only worsen the problem since the mounting surface will be closer to the centerline of the wheel. In other words, if you add a 5mm spacer to your +42 offset wheels, you will end up with a +37 offset.

btw, with your choice of wheels and your mention of springs such as the S-Techs, you really should be reading the stickys at the top of the forums and put in a little research before making anymore purchases.
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Old 01-20-2007, 07:44 AM   #11
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...save some $$$ to buy new struts when the slammer springs kill the struts ya got...and save some more $$$ to put real springs on the car when ya tired of the crappy ride ya get outa the junk springs......

Be careful not to crack the paint on the wheel arch when ya roll the fenders...and if ya don't understand why spacers will only make the issue worse.....

STOP.....what ya doin...

...and educate yourself on just exactly what ya doin before ya do something real dumb and waste any more $$$
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Old 01-20-2007, 03:01 PM   #12
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trial and error. we know you're gonna do it anyway, so just do it and let us know you'll be realy close to either having to go 1 notch lower in the tire sizes or having to roll the fenders. Just make sure the tire guy gives you some sort of 'no rubbing' gaurantee.
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Old 01-20-2007, 03:16 PM   #13
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what about this..........http://forums.nasioc.com/forums/show....php?t=1172782

i started this thread not too long ago and alot of guys are running very low offsets check it out!
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Old 01-20-2007, 04:17 PM   #14
jamie_w456
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225/45/17
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