Datsun Roadster Forum-311s.org

Anyone have these rims? Or know if they will fit? What tire size should I use?

They have a 15 X 7 size with bolt pattern 4 X 4.5 and 0 offset.

http://www.bigwheels.net/?location=whee ... Slot%20Mag

Center hole size is important, I think the 14x6 or maybe even 5.5 set I have are also zero offset, don't fit on the rear with 185/60-14, too far out.

As Dave said - 4X6 @0 is too much lip to fit in the rear.
15X 7 @0 adds a half inch to too much.

bummed out now! haha... thanks though...

are there any rims like these that would fit our cars? I saw some on the wheels faq shelby 5 slot... but havent found any....

The 5 slot rims were made by so many companies and many fitments. The comon fit on the roadsters were 14X5.5

You'll find alot of vintage used 14 X 7 Zcar fitments out there. The'll rub for sure. The 14X6's are plentiful

I believe these guys have slotted mags up for sale on eBay every once in awhile. They should be able to assist...

datsunlandsocal

TR

For just about 100% fit you are always safe to get some early Z rims 14 x 6 or even 15 x 7 with a zero offset. The bolt pattern is 4 bolt x 4.5".

Im confused... so if the wheel states 15 X 7, 4 X 4.45, and 0 Offset... there are still variations??

http://cgi.ebay.com/ebaymotors/AE86-510 ... enameZWDVW

This one is the same but with a 4" backspace... will these fit?

Excuse my ignorance....

OK, this is confusing, I'm confused, and I wrote it, but here goes. Someone please correct me if I am wrong.

The numbers are kind of arbitrary, and if the width changes, the backspacing will also change with the same offset.

15x7 3 1/2 backspace is 0 offset (3 1/2" outer rim to flange)
15x7 4 inch backspace is 1/2 inch -offset (3" outer rim to flange)
15x6 3 1/2 inch backspace is 1/2 " -offset (2 1/2" outer rim to flange)
15x6 4 inch backspace is 1 inch -offset(2 " outer rim to flange)


In the above numbers the backspace varies by 1/2 inch total, the offset varies by 1 inch total, but the position of the outer rim in relation to the drum/rotor face (frontspace?) varies by 1 1/2 inches. I believe only the bottom 2 will fit.

Basically, the outer edge of the wheel needs to be2"-2 1/2" from the part of the wheel that goes against the drum or rotor. On a 7inch rim, that would be 4 1/2" to 5" offset. What we are really dealing with is the front spacing, the outer edge of the tire/wheel is where it will hit. Also, 195 width will be 5mm wider than 185's, you need to add the tire clearance into the picture too.

Positive offset makes the wheel stick out of the fender, negative offset makes the wheel tuck into the fender.
Look here http://www.311s.org/tech/wheels/offset.html

I have 200sx wheels on my 2000, very negative offset, nice clearance in the rear, added a 1/4 spacer in the front to clear the too small center hole, but still fits in the fenders. My car is severely lowered, so I am dealing with tight clearance. Rear fender lip is rolled, front is not.

If you can borrow a set to try out, great. Otherwise, you might get stuck with a set of wheels like I did.

Let me know if you need any measurements.

What I did to double-check clearance was to jack up the whole rear by the axle, both wheels off the ground.so it was level left to right and take off the wheel and drop a plumb line (string with a bolt tied to it) from the innermost part of the fender lip and measured to the axle flange. This tells you the maximum amount the tire wheel assy can be from the back side of the wheel flange to the outer edge of the tire. Check a mounted wheel/tire by laying a straightedge across the outer sidewall of the tire across the center of the wheel and measure from the straight edge to the back of the wheel flange. This # must be less than the distance from the string to the drum or rotor.

I dont think that article is right.

They got the offsets mixed up.

Positive offset is when the mounting face is closer to the outside of the rim (anything between the outward face of the rim and the center line is positive offset).

Negative offset is when the mounting face is closer to the back side of the wheel (between the centerline and the inner side of the wheel).

This is the generally accepted modern definition of offset (especially when dealing with Japanese cars). That article is the only time I have seen offset defined as the opposite of what I understand offset to be.

Most modern cars have wheels with positive offset, this gives more room for brake calipers.

Here it is explained by yokohama. These pictures are alot easier to follow than the ones in that article.

from http://www.yokohamatire.com/utcustom.asp

MR. Cammo comes through again.

Think of the crazy fad that some folks had (or still have) with the lowered trucks with the wheels sticking WAY out the sides. A Dramatic example of Negitive offset.

Now think of the modern FWD econoboxes where it appears the the hub is outside the rim - That's Positive offset

Dave- your measurements don't take in consideration the total width of the wheel

a 15 X 7 will be 8'' or very close to 8 in total
Backspacing at 0 offset would be 4''

Here's EXTREEM negetive offset - think how far these puppies would stick out on a roadster!

I sit corrected.

BTW, those are some seriously funky wheels, Just what I need for the Pimpster. Maybe 13'diameter with some 195-50's