Wide body wheel widths and offset Options

[FastFroggy]

I was taking a break from the fiberglass repair and noticed on my car that the tires sit different front to rear. then I was surprised that the fronts are 9in and rears are 8in wide rims... then the final surprise was that the offsets were significantly different.

My car is a 5 bolt conversion 73 914-4 of unknown origin with wide body fenders.

Please explain the general convention on this.

Thanks

[FastFroggy]

ok, finally had a few moments to get me info together.

My car is primarily intended for react use. ( Waterford, Grattan, MidOhio etc ) I am a low horse power car ( modified 1.7 )
(IMG:http://www.914world.com/bbs2/uploads_offsite/img.photobucket.com-19415-1454278252.1.jpg)

I was wrong on width in my original post. I have:
2 x 7Jx15 Fuchs 911.361.020.41
2 x 8JX15 Fuchs 911.361.020.42

I believe they are 23.3(7J) and 10.6(8J) mm offset respectively.

Front suspension
(IMG:http://www.914world.com/bbs2/uploads_offsite/img.photobucket.com-19415-1454278252.2.jpg)

Rear Suspension
(IMG:http://www.914world.com/bbs2/uploads_offsite/img.photobucket.com-19415-1454278298.1.jpg)

The tires look like they will do at least one season before replacing them. So I'll just use them to sort out the car, myself and see what I think of the balance. Just curious the conventional wisdom on this subject.

My gut feel right now would be to got to 205/50r15 front on the 7Js and 225/45r15 rear on the 8J. I know there are a lot of factors. But this is close to the tire width balance of the boxster/cayman... cannot be that far off.

Thanks for the help

[Randal]

ok, finally had a few moments to get me info together.

My car is primarily intended for react use. ( Waterford, Grattan, MidOhio etc ) I am a low horse power car ( modified 1.7 )

I was wrong on width in my original post. I have:
2 x 7Jx15 Fuchs 911.361.020.41
2 x 8JX15 Fuchs 911.361.020.42

I believe they are 23.3(7J) and 10.6(8J) mm offset respectively.

Front suspension

Rear Suspension

The tires look like they will do at least one season before replacing them. So I'll just use them to sort out the car, myself and see what I think of the balance. Just curious the conventional wisdom on this subject.

My gut feel right now would be to got to 205/50r15 front on the 7Js and 225/45r15 rear on the 8J. I know there are a lot of factors. But this is close to the tire width balance of the boxster/cayman... cannot be that far off.

Thanks for the help

What is your front to rear weight figures off a corner balance?