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  FRONT 17X7 or 17x7.5 40MM OFFSET REAR 18X8 or 17x7.5 40MM OFFSET?

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FRONT 17X7 or 17x7.5 40MM OFFSET REAR 18X8 or 17x7.5 40MM OFFSET? by ltlgt88
Started on: 07-01-2015 01:22 PM
Replies: 3 (208 views)
Last post by: zmcdonal on 07-04-2015 02:46 PM
ltlgt88
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Report this Post07-01-2015 01:22 PM Click Here to See the Profile for ltlgt88Send a Private Message to ltlgt88Edit/Delete MessageReply w/QuoteDirect Link to This Post
I am looking at new tires and rims, and have done lots of searches, but can't find definitive answers weather or not this will work.

AM NOT LOOKING FOR OPINIONS ON LOOKS OR WEATHER OR NOT THEY WILL STICK OUT FROM FENDERS, OR IF I NEED SPACERS (chart gives me that info)

I have an 88gt with stock suspension components with Fiero Store Lower spring in rear with, and WCF 1.5 inch lowering springs in front. Currently i am running 17x7.5 (unknown offset) wheels all the way around with 235/45r17 up front and 245/45r17 in the rear. Get no rubbing and no interference on turns.

All i am wanting to know is if these will work with out rubbing, and interference while while turning.
Front
17x7 40mm offset 225/45r17
or
17x7.5 40mm offset 225/45r17

Rear
17x7.5 40mm offset 245/45r17
or
18x8 40mm offset 255/45r17
(if this rubs would be ok with 245/45r17)

I have looked at the offset chart, and the wheel tire chart, and i believe I am ok, just want to clarify or know if anyone is running these setups?

AM NOT LOOKING FOR OPINIONS ON LOOKS OR WEATHER OR NOT THEY WILL STICK OUT FROM FENDERS, OR IF I NEED SPACERS (chart gives me that)

JUST LOOKING IF THERE WILL BE RUBBING OR INTERFERENCE

thanks in advance!

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Alex4mula
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Report this Post07-01-2015 03:53 PM Click Here to See the Profile for Alex4mulaClick Here to Email Alex4mulaSend a Private Message to Alex4mulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
I am 100% sure all except this will work on an 88: 18x8 40mm offset 255/45r17. On that one the 245 should be fine and I would say 90% chance the 255 could work on a 35 height. Also I would do 245/40.
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California Kid
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Report this Post07-01-2015 06:08 PM Click Here to See the Profile for California KidSend a Private Message to California KidEdit/Delete MessageReply w/QuoteDirect Link to This Post
You can check out my car with like in signature below, go to page 7 and scroll down page about 3/4 way. My car is lowered very similar to yours and thread has many details.

I would only add that if you have bumpy roads in your area, 40 series tires are going to give you a rough ride. For me the 45 series gave me a little better ride with same cornering performance.

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zmcdonal
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Report this Post07-04-2015 02:46 PM Click Here to See the Profile for zmcdonalSend a Private Message to zmcdonalEdit/Delete MessageReply w/QuoteDirect Link to This Post
You should be able to figure the current offset of your current wheels by measuring the backspacing and doing a little math. That might help with a baseline of how different your new wheels will fit.

Take a ruler and measure from the surface that mates to the hub to the back edge of the wheel.
This images is larger than 153600 bytes. Click to view.
Your currently running a 7.5 so the center line of your wheel will be 3.75" take the difference between your backspacing number and 3.75 and then convert to mm and that should be your offset.

Since you are wanting to run a smaller tire up front than what you have now, you should be good as long as the offset works.

255/45/17 is a whole lot of tire.

I think it should fit, I think 27" is the max overall diameter that should fit without rubbing from what I remember with my research, however you may need coilovers, not sure since the 88's have more room for a wider tire.

[This message has been edited by zmcdonal (edited 07-04-2015).]

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