I need some help as iv completely damaged my passenger side alloys a pair of G7 alloys (£600 a piece) and iv decided to change them all together im opting for some kahn RSC 1pc.

 

These come in 18x8 but i wanna widen them at the rears coz im gonna be getting a wide arch kit whats the largest size spacer i can get without having the wheels come off

 

Iv read previous threads about having nismo threads which are longer which can be fitted but i want another 2 inches minimum in width increased so it blends in with the wide arch.

 

Any ideas guys

 

Need to buy some alloys quick.

 

Fas

what i meant by longer threads was the nismo studs that can be bought from MJP but how much can i extend the push out on the wheel.

 

Any help please

You need special spacers which bolt to the hub and the wheel bolts onto that if you are going wide arch.

The spacers are about 2.5 inches thick so you can't just use long bolts!

All you can do is get alloys to fit the car now and get the spacers made up later. Wide arch spacers are about £300 :o

I found this article:

 

The wider rear rims have a +50mm offset.

 

You can use wheels with less or more offset.

The important thing is to align the center of the wheel

over the center of the wheel bearing as closely as you can,

so that the stresses will be picked up as designed into the car.

If they're not, you can be looking at wheel bearing failure in

pretty short order. You can damage other components if a wheel

bearing fails, such as the ABS sensors in front ($950 each, because

they're part of the hub which has to be replaced at the same time).

Front bearings go for about $85 each - there are two.

Rear bearings are about $125 each.

Both these prices are at a discount from list...

 

Some folks buy wheels with more offset than stock,

then add spacers to move the wheel back on the bearing center.

You can do that, but you may have to invest in longer wheel studs

if the spacers are more than maybe 3 mm.

Wheels with less than stock offset invite rubbing on fender well

sections and stress on the bearings, plus changes in camber,

which introduces more tyre wear....

 

nb Compare 18" and 17" tyre prices......

I dont think it can effect your ABS on a Z as the rear ABS sensors are more or less on the diff. But could effect the front ones.