back spacing

[ka24sleeper]

Ive been looking at diamond racing rims and want to know how much back spacing i need to clear the rims( running 300zx 26mm brakes). Tried looking online on my phone but it wont load certain pages. Does any one know?

[Matt93SE]

Backspacing doesn't take into account caliper clearance. that's the problem you need to figure out. pull a wheel off and measure the distance from the center of the hub to the widest part of the caliper. then measure the distance from the rotor face to the widest part- it's around 2.5" IIRC.
subtract that from the rotor hat offset (how far the face of the rotor sits behind the hub), then call diamond with that info or look at their drawings if they supply them and go from there.

[ka24sleeper]

Sweet, thanx

[Jason M]

Try looking for an order form for your wheels or for spinwerks racing wheels. The order form will show you all the measurements that you need to make.

[Black R]

http://www.willtheyfit.com/

Then convert offset to backspacing.

What size wheels and tires are you trying to run on which particular chassis?

[sil8y]

I thought 300z brakes were either 30 or 32mm. Is there a 26mm???

[KA240SX808]

It's 26 & 30. I believe 32 was GTR Size.

[mys13isdirty]

http://www.willtheyfit.com/

Then convert offset to backspacing.

What size wheels and tires are you trying to run on which particular chassis?

Thanks for the web site suggestion very helpful...