What are the factory wheel offsets

AviatorTim · 11-05-2011, 05:10 PM

In addition to changing the performance, I was wondering about adequate clearance for the break components.

I compared the Base, Sport and Nismo rims and noticed that, although the offset varies greatly in the rear (15, 30, and 23), it is consistantly large in the front (43, 47, and 40).

I was wondering if this related to the fact the front brakes are larger. Do you need the additonal offset in the front to accomodate the larger breaks?

Red__Zed · 11-05-2011, 08:06 PM

Quote:

Originally Posted by AviatorTim

In addition to changing the performance, I was wondering about adequate clearance for the break components.

I compared the Base, Sport and Nismo rims and noticed that, although the offset varies greatly in the rear (15, 30, and 23), it is consistantly large in the front (43, 47, and 40).

I was wondering if this related to the fact the front brakes are larger. Do you need the additonal offset in the front to accomodate the larger breaks?

higher offset brings them in closer, lower offset moves the wheel face away from the brakes.

The wheels you are looking at will fit fine in the front, maybe a little weak. you'd probably want a 15-25mm spacer in the rear.

AviatorTim · 11-06-2011, 10:04 AM

Ah nuts. I thought I was grasping the concept but Red's reply only confuses me more. Perhaps a photo will help. I thought brake clearance was determined by how far the center hub I marked in red is elevated off the disk.

And I thought offset was predominantly a measure of how much lip the wheel would have. For instance, in these two similar wheels below it seems the one on the right has a large offset because the mounting surface is pushed forward away from the center of the wheel and the one on the left has a smaller offset because the mounting surface is closer to the center of the wheel.

Wouldn't both these wheels have the same brake clearance based on how high the hub built into the disk is elevated?
And the left one has a deeper lip because it has a smaller offset?

Help me out Red. Why do you suggest I would only need a spacer on the rear? If anything, I thought I might only need one on the front because of the larger brake calipers.

Confused in Pittsburgh,
Tim

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11-05-2011, 05:10 PM	#1 (permalink)
AviatorTim Base Member Join Date: Oct 2011 Location: Orlando Posts: 33 Drives: 09 Nissan 370Z Rep Power: 15	In addition to changing the performance, I was wondering about adequate clearance for the break components. I compared the Base, Sport and Nismo rims and noticed that, although the offset varies greatly in the rear (15, 30, and 23), it is consistantly large in the front (43, 47, and 40). I was wondering if this related to the fact the front brakes are larger. Do you need the additonal offset in the front to accomodate the larger breaks?

11-06-2011, 10:04 AM	#3 (permalink)
AviatorTim Base Member Join Date: Oct 2011 Location: Orlando Posts: 33 Drives: 09 Nissan 370Z Rep Power: 15	Ah nuts. I thought I was grasping the concept but Red's reply only confuses me more. Perhaps a photo will help. I thought brake clearance was determined by how far the center hub I marked in red is elevated off the disk. And I thought offset was predominantly a measure of how much lip the wheel would have. For instance, in these two similar wheels below it seems the one on the right has a large offset because the mounting surface is pushed forward away from the center of the wheel and the one on the left has a smaller offset because the mounting surface is closer to the center of the wheel. Wouldn't both these wheels have the same brake clearance based on how high the hub built into the disk is elevated? And the left one has a deeper lip because it has a smaller offset? Help me out Red. Why do you suggest I would only need a spacer on the rear? If anything, I thought I might only need one on the front because of the larger brake calipers. Confused in Pittsburgh, Tim