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-   -   First gen Wider Tires/Lowering (https://www.rx7club.com/new-member-rx-7-technical-256/first-gen-wider-tires-lowering-803551/)

Twilightoptics 11-30-08 12:27 PM

First gen Wider Tires/Lowering
 
It looks like the maximum back spacing is already achieved with the stock wheels. Lock to lock they are pretty close to the chassis. If I find some 15x7 wheels for the 4x110 hubs, will they fit with the same back spacing and approximately same tire dia?

Thanks.
Need more traction!
-Paul

WLD 07 12-01-08 02:43 AM

I'm using 8" wide rims on my 1st Gen with 235/40/17 tires.

I wouldn't go much wider though.

Twilightoptics 12-03-08 08:04 PM

Well here is what I've come up with.... Assuming the information I got on the forum here is correct:

Stock wheel (non-se) is 13/5.5R13 with a 25-27MM +Offset

That means
2.75 + 1(27mm) = 3.75" of the wheel is inward of the hub flange.

So a 7" wide wheel with a 42MM + offset has 3.5+1.65=5.15" inward of the flange.

5.15-3.75=1.4" Spacer

So If I run a 1" spacer, with a 16x7 Wheel, 42MM +offset.... I should be pretty good to go?

I've seen some inconclusive claims that some aftermarket 4x110, 15x7 wheels came with a 20mm offset. That'd seem to put the wheel an inch farther inward.


Anyone confer?

I'm thinking of ordering the wheels and then build a temporary fitment spacer and shim it until I have the right size for the adapter.

Thanks
-Paul

PercentSevenC 12-03-08 08:42 PM

Specifically, Konig Rewinds are 15x7 with a +20mm offset.

Twilightoptics 12-04-08 05:31 PM

And the Rewinds fit w/o any modifications?

PercentSevenC 12-04-08 05:46 PM

Yes.


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