Dumb Question..what is back-space

[rod locker]

..........when discussing wheels? This may be an elementry question but I would like to know.

Thanks...........

 

[mullinax95]

Experiment with this http://www.rims-n-tires.com/rt_specs.jsp

It will show you quicker than me telling you. Change the offset figures and you can see the back spacing measurement change.

 

[~LadyLuck~]

maybe this will help

How to Measure Wheel BackSpace

Items required to measure wheel backspace:

Tape measure

Straight edge

Wheel w/o tire (preferred)The easiest way to measure backspace is to lay the wheel face down onto the ground so the backside of the wheel is facing up. Take a straight edge and lay it diagonally across the inboard flange of the wheel. Take a tape measure and measure the distance from where the straight edge contacts the inboard flange to the hub mounting pad of the wheel. This measurement is backspace. The above photo shows three wheels with 2",3", & 4" backspace​

 

[abodyjoe]

basically it is the measurement from where your wheel meets the brake drum to the edge of the rim going towards the springs.

 

[rumblefish360]

Not a dumb question.

You can figure your own out with a straight edge and a tape measure like the diagram avoe shows.

Just lay the straight edge, like a level across the back of the tireless rim if possible and measure how deep the ruler goes to the bottom flat spot.

 

[srduster340]

The only dumb question is one that is never asked.

 

[rod locker]

Thanks for the info. Looking to install 205/75/15 front and 275/60/15 rear on a 1974 Duster. Thanks again.

 

[RPM]

thats the size of tires I run on my car. You will need to bump the rear up a little or each time you hit a small curb the tire will touch the fender.

f.y.i.



-RPM