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Old 08-29-2012, 07:20 PM   #43
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What would the effect be by switching to the ZL1 size 305 on the rear of the 1LE?
Quite sure they wont fit. The 285s are already "stretched" on as GM and Al Oppenheimer have stated.
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Old 08-29-2012, 07:28 PM   #44
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Why would they not fit? Same body and rim as zl1. You can use 305s. GM didnt do it because of balance and wanting to cure understeer. Zl1 has more mass and all that torque needs a wider tire.
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Old 08-29-2012, 07:33 PM   #45
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Originally Posted by SUKXOST View Post
Quite sure they wont fit. The 285s are already "stretched" on as GM and Al Oppenheimer have stated.
That's because instead of putting a 20 x 10" rear which would be proper fit for the 285's they still used teh 20 x 11" rear so they had to "stretch" the tires.
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Old 08-29-2012, 07:41 PM   #46
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That's because instead of putting a 20 x 10" rear which would be proper fit for the 285's they still used teh 20 x 11" rear so they had to "stretch" the tires.
Exactly...that's why I was saying above that the 305's someone mentioned would not fit due to that.
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Old 08-29-2012, 07:53 PM   #47
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The 305's will fit the back 20X11 rims, just as they do on the ZL1. They will add understeer to the 1LE. GM went square on the 1LE for a more neutral handling car.
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Old 08-29-2012, 09:22 PM   #48
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Exactly...that's why I was saying above that the 305's someone mentioned would not fit due to that.
305's are a wider tire. The reason the 285 is stretched because they are fitting it over an 11" rim in the rear instead of the 10" in the front. Thus there would be no problem fitting a 305 on the 11" rim. I'm sure you can go as high as a 315. but that would only be for show. Anything above the 285 would induce understeer at a road course track.
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Old 08-30-2012, 05:41 AM   #49
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305's are a wider tire. The reason the 285 is stretched because they are fitting it over an 11" rim in the rear instead of the 10" in the front. Thus there would be no problem fitting a 305 on the 11" rim. I'm sure you can go as high as a 315. but that would only be for show. Anything above the 285 would induce understeer at a road course track.
HOLY F*DGE. Total brain fart. My brain keeps thinking about the smaller fronts as maxed out on the wheels or something but I KNOW anything over 285 is bigger. LOL Not sure where my head was there for a minute. Ha I had to re read my last couple posts to try and figure out what the hell I was thinking and why the hell I would have said that. Maybe I was somehow thinking of a bigger WHEEL and not the tire?
I've settled on the conclusion that I'm RETARDED. ha Back to reality
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Old 08-30-2012, 07:27 AM   #50
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HOLY F*DGE. Total brain fart. My brain keeps thinking about the smaller fronts as maxed out on the wheels or something but I KNOW anything over 285 is bigger. LOL Not sure where my head was there for a minute. Ha I had to re read my last couple posts to try and figure out what the hell I was thinking and why the hell I would have said that. Maybe I was somehow thinking of a bigger WHEEL and not the tire?
I've settled on the conclusion that I'm RETARDED. ha Back to reality
No worries there soldier, we all experience brain farts. That's what we're here for, there's going to be somebody who's going to straighten us out when we have our momentary lapses of reasoning. Carry on!
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Old 08-30-2012, 08:27 AM   #51
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I dont think u had a brain fart, u just too excited about that sick car u got coming. I cant sleep anymore wondering when mine is coming and then this morning my dealer tells me I am still at 1100 status!!!!!! Suks.
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Old 08-30-2012, 11:57 AM   #52
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I dont think u had a brain fart, u just too excited about that sick car u got coming. I cant sleep anymore wondering when mine is coming and then this morning my dealer tells me I am still at 1100 status!!!!!! Suks.
Me too. I just email my uncle( sold me the car) and asked him wtf basically. ha He said he knows someone very well above him that may be able to "pull my order and get it moved up". I'll laugh if I come off the line one single # in front of you. LOL
Still waiting to hear back from him. I ordered mine on 18 Aug and still 1100 as well.
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Old 08-30-2012, 12:08 PM   #53
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Me too. I just email my uncle( sold me the car) and asked him wtf basically. ha He said he knows someone very well above him that may be able to "pull my order and get it moved up". I'll laugh if I come off the line one single # in front of you. LOL
Still waiting to hear back from him. I ordered mine on 18 Aug and still 1100 as well.
Hope you hear from him soon and get it taken care of. It'll definately be worth the wait.
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Old 08-30-2012, 12:11 PM   #54
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For sure! It's just SSSOOOO frustrating. I KNOW it's several weeks away and it's a bit silly to want to know.....Whats up today? HA Wish I could fall into a coma for a few weeks and wake up sitting in it :P
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Old 09-01-2012, 04:07 PM   #55
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If you want a car to feel truly neutral you should keep the same tire and rim size on all corners. What GM did actually doesn't seem to make sense. I am very familiar with setting up a car to feel more neutral and balanced with success, one instance was when I placed a 15x8" wheel with 205-50-15 up front and rear was 195-55-15 rear on a 15x7" rim and this was to make an E30 BMW 325E feel neutral because of the inline 6 Iron block up front being soooo damn heavy. It worked greatly so much that the car felt very neutral and I ended up almost damn near turning into the curb every time I cornered. Only thing was that the car looked weird with a wider front than rear. 285s on the 11" rear is going to be stretched tighter than 285s on front resulting in more taught feel than the sloppier front setup, this as well would induce a slight under steer effect. I honestly think that 305" in the rear would add more grip and have similar or less understeer effect due to the fact that the rear would now have a less taught stretched tire set up and more slop allowing the rear to sway more outwards when entering corners.
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Old 09-01-2012, 07:35 PM   #56
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The 305's "will" provide more grip, ensuring understeer.
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