Wheel Offset - lowered car

[Bluemustang]

So I'm looking to buy some aftermarket wheels for my GT. I'm lowered on Ford Racing suspension. I've notice some topics on wheel offset and it seems that changing the wheel offset altering the position of the wheel in relation to the struts, and thereby changes the scrub radius.

Obviously the OEM wheels are designed for the car. I'm worried that changing wheel offset will negatively impact my ride or performance. If the scrub radius is changed, does that affect bumpsteer effect as well? Or that only related to the ride height?

The wheels I'm looking at are RTR Tech 7 19s or SVE 350s 19s.

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[BmacIL]

So I'm looking to buy some aftermarket wheels for my GT. I'm lowered on Ford Racing suspension. I've notice some topics on wheel offset and it seems that changing the wheel offset altering the position of the wheel in relation to the struts, and thereby changes the scrub radius.

Obviously the OEM wheels are designed for the car. I'm worried that changing wheel offset will negatively impact my ride or performance. If the scrub radius is changed, does that affect bumpsteer effect as well? Or that only related to the ride height?

The wheels I'm looking at are RTR Tech 7 19s or SVE 350s 19s.

Bumpsteer changes when ride height changes. The magnitude can be effected by offset via the scrub radius. If you have bumpsteer, and then go to more positive scrub radius, it'll feel worse. Higher offset, particularly in combination with wider tires will make the car tramline worse, bumpsteer aside.

The width and offsets of those above choices are excellent, btw. I am at 19x9.5 with +35 all around and love the handling and looks. It definitely adds some steering weight and feel, which is nice.

 

[Grintch]

Your right. And this is another reason people bolting on 25mm spacers is bad.

The issue is if you stick to the stock ET45 offset you hit the front strut with wider tires fairly quick. Going to 40 or 35 buys you more room. 30 - 40 is probably the right range to maximize the size tire that will fit, depending on ride height and camber.

 

[Bluemustang]

Bumpsteer changes when ride height changes. The magnitude can be effected by offset via the scrub radius. If you have bumpsteer, and then go to more positive scrub radius, it'll feel worse. Higher offset, particularly in combination with wider tires will make the car tramline worse, bumpsteer aside.

The width and offsets of those above choices are excellent, btw. I am at 19x9.5 with +35 all around and love the handling and looks. It definitely adds some steering weight and feel, which is nice.

Thanks BmacIL. Now considering you know I have a Steeda Bumpsteer kit in front - any issues you could see potentially with either of those wheel setups? I do want some wider tires because as you said- a car with this much power and RWD and the weight to boot- it wants some fatter rubber.

My tramlining has gotten so much better with tires and alignment. But I don't want to be back at square one if you know what I mean. Also the SVE Drifts are on my radar too.

 

[BmacIL]

Thanks BmacIL. Now considering you know I have a Steeda Bumpsteer kit in front - any issues you could see potentially with either of those wheel setups? I do want some wider tires because as you said- a car with this much power and RWD and the weight to boot- it wants some fatter rubber.

My tramlining has gotten so much better with tires and alignment. But I don't want to be back at square one if you know what I mean. Also the SVE Drifts are on my radar too.

I don't find my tramming to be bad and I think if you go to around a +35-40 you won't have too much of an increase. It's very, very tire dependent too. Car definitely needs at least 275 all around for sure.

 

[Bluemustang]

Thanks. Appreciate it [MENTION=10281]BmacIL[/MENTION]

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