I've searched... can't find it! Does anyone know what is the backspacing for a stock SE wheel? thx!

 

Anybody?

 

OEM tires: 185/70-14 (614x185mm). Bolt pattern: 4x114.3 (4x4.5). Offset: 35 to 45 mm. Tires up to 634x205mm (front). Rims up to 18x7.5" (front).

From:

http://www.bigcustomwheels.com/info_specs.jsp

 

Tire rack recommended 15x7 with 25mm offset.

 

According to the FSM:

45MM offset with a 5 1/2 wide wheel

-billy

 

I know the preferred offset. I am looking for the backspacing on the stock SE wheel (measurement of the back of the mounting surface to the lip of the wheel).

 

The Math:

Take the offset of 45MM. Multiply it by .03937 to convert to imperial = 1.771"
Take the wheel width and divide it by 2 to get half of the wheel = 2.750"
Add half the wheel to the offset to get backspace = 4.521"

-billy

 

Thanks Billy.... but does the stock wheel have a 45mm offset? I thought it was under 40mm?

 

Factory service manual said 45mm .... found here -> http://www.wankel.net/~krwright/cars/rx7/manuals.html

and per 13BT_RX3's post a 7" with 25mm would only be 1mm difference at the backside of the wheel from stock.

-billy