305/35/20 Rubbing

[bry9]

I have 20x10 ET45 wheels with 305/35/20 tires.
They rub just slightly on the inner rear wheel lip.

Any suggestions? I see a lot of guys running this combo.

I have all BMR parts in the rear,had it aligned to BMR Specs, could the alignment be an issue?

Sponsored

 

[Todd15Fastback]

How much rear camber are you running? I had full Steeda suspension with 20x11 +45 on 305/35/20 tires out back and -1.8 - -2.1 camber on different alignments and never any rubbing.

 

[chrisgonzales]

yeah whats your alignment, mine is like todds 20x11 +45 rear i'm running 305/30/20 which is less sidewall but if your rubbing on the inner rear. Can you you see what it's rubbing against as we have alot of space inside, people have run 12" rears.

attached is my last alignment ignore the caster its never been in spec and front camber is intentional

 

[bry9]

My BMR specs say camber as close to Zero as I could get.
They are rubbing the outside. The wheel sticks out past the lip.

 

[bry9]

Ok. I looked at my alignment.
It shows 0.4 and 0.3 for camber. That's probably my problem.

 

[Eisman]

You need more negative camber for sure.

 

[bry9]

Ya. Mine does not show - negative. Just says 0.3 and 0.4

 

[chrisgonzales]

i doubt that it's positive camber but yeah a bit camber out back is fine i not sure if a drag car setup is better with less but adding a touch more should help bringing it closer to -1 at least should help

 

[Paul@PKAUTODESIGN]

run the setup at -2 degrees for the rear and youll be perfect.

 

[Eisman]

Just in case you're wondering... I just installed some 325/30R19 MP4S today. I'm running about -1.5 deg camber, and it isn't enough.

 

[jasonstang]

yeah whats your alignment, mine is like todds 20x11 +45 rear i'm running 305/30/20 which is less sidewall but if your rubbing on the inner rear. Can you you see what it's rubbing against as we have alot of space inside, people have run 12" rears.

attached is my last alignment ignore the caster its never been in spec and front camber is intentional

That is so bad ass fitment.

 

[bry9]

That is so bad ass fitment.

I'm rubbing the lip on the outside when I hit a bump or turn.

 

[jasonstang]

I'm rubbing the lip on the outside when I hit a bump or turn.

Need to get some camber and tuck the top in.

 

[chrisgonzales]

What spring setup are you running I would try like Paul said -2 and if that's too much for you slowly work less camber but finding what fits first

 

[bry9]

BMR drag springs and every part they sell for the IRS. BMR specs say close to Zero as I can get for camber. I'm at +0.3 and 0.4. I think the tech said something about he set it that way because the springs were new.

Sponsored