Offsett Affect Performance?

[R34NRG]

just about to purchase my 1st set of Rays and was calculating sizes and offsets with a buddy from Musecret.

we calculated for the rears there would be a total for 127mm of dish and the fronts 87mm. with offsets of +15 and + 8 respectively

he also mentioned they were type B (something to do with the amount of dish and break clearance)

he also mentioned that having smaller offsets puts more strain on the car and results in lower handling, performance ect ect

was quite surprised but some how it makes sense.

was wondering if anyone could shed some light on the topic.

oh also do u guys rkn the dish is to much?

[Yawn]

Type A, B, etc mainly refers to the face of the wheel and sometimes spoke curvature/dish, where certain types are designed to clear big brakes, while others arent.

A lower offset putting more strain on the car doesnt make any sense. Perhaps more strain on the wheel itself if the offset is something mad like -20.

The way I see it, the only way a lower offset can affect performance is that the wheels sit further outwards, giving the car a wider base, making it more stable, sorta.

On a side note, for those offsets you're gonna need guard work or some massive camber.

Edited October 7, 2007 by Yawn

[adam-__-]

He's getting a wide body on his car.

You never have too much dish

[siddr20]

WOW +15 and +8 offsets??????????

man you better be going widebody!!

if not, say goodbye to your guards

[Beer Baron]

A lower offset putting more strain on the car doesnt make any sense. Perhaps more strain on the wheel itself if the offset is something mad like -20.

The way I see it, the only way a lower offset can affect performance is that the wheels sit further outwards, giving the car a wider base, making it more stable, sorta.

not true. basically the further out from the hub the wheel centreline is the more strain is put on the hubs, suspension and most of all the wheel bearings.

[n15m0]

I agree with BB, lower offset, means widening the track width = changing the center of gravity of your car and hence putting additional strain on suspension parts eg bushes etc....

That said, there is an optimal range of offsets which will be bugger all impact on the above...+8 might be pushing it or anything with a -ve offset...

[adam-__-]

How wide are these wheels with the +15 and +8 offsets?

[Yawn]

not true. basically the further out from the hub the wheel centreline is the more strain is put on the hubs, suspension and most of all the wheel bearings.

True, makes sense

Is it a noticeable strain though? Like handling affected, suspension components failing more frequently, etc.? Or more of a theoretical strain?

Edited October 7, 2007 by Yawn

[R34NRG]

not true. basically the further out from the hub the wheel centreline is the more strain is put on the hubs, suspension and most of all the wheel bearings.

thats what i was worried about......with those specs do u think i would be risking serious damage or anything? i have plans of 300+rwkw.....so im a little worried about low offsets doing some dmg

How wide are these wheels with the +15 and +8 offsets?

19x11 on the rears and 19x9 on the fronts

True, makes sense

Is it a noticeable strain though? Like handling affected, suspension components failing more frequently, etc.? Or more of a theoretical strain?

would like to know this aswell. im getting a suspension kit from sydneykid to better the handling.....i hope having these wheels wont make it worse off

Edited October 7, 2007 by R34NRG

[VB-]

most notable stress would be on wheel bearings IMO. bigger offset = wider track. wider track means the car *should* be more stable through corners, cant really see any drawbacks in relation to handling, unless your alignment is thrown out by something

[Beer Baron]

well basically the further out you go the bigger the problem. if you started with your stock 17X7 +38s or whatever they are. and you go to 19X11 +20 off the top of my head that's about 65mm further out. plus they are much heavier (even if the rims are lightweight there is no such thing as a light weight 19inch tyre) so yeah it will be putting more strain on suspension and bearings. but a wheel in that size is all about looks anyway as they would be useless from a performance point of view so I wouldn't worry about it too much. probably the only consequence you will find is that you flog out wheel bearings much faster than normal.

[mad082]

thats what i was worried about......with those specs do u think i would be risking serious damage or anything? i have plans of 300+rwkw.....so im a little worried about low offsets doing some dmg

you'll crash it anyway so what's the point?

also you should note that changing your track can make you car illegal. in VIC, you can only widen the rear track on an independant rear suspension car by 25mm (front is also 25mm), so that is 12.5mm per wheel. so that means you can only change the offset of the wheel by 12.5mm.

also having a wider rear track than front track can make the car a bit more unstable going into corners under brakes, and slightly easier to roll. having a wider rear track makes the dynamics a bit more like a trike.

[adam-__-]

also you should note that changing your track can make you car illegal. in VIC, you can only widen the rear track on an independant rear suspension car by 25mm (front is also 25mm), so that is 12.5mm per wheel. so that means you can only change the offset of the wheel by 12.5mm.

That's f**kin gay. I always thought it was 25mm on EACH side, but it's all together. Everything's f**kin illegal.

Would those wheels rub against your coilovers? They're pretty wide wheels on such a high-ish offset.