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Post by stevensolds on Oct 20, 2004 14:02:02 GMT -6
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scottydl
Super Moderator 
There's nothin' like an American V-8...
Posts: 7,373
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Post by scottydl on Oct 20, 2004 14:19:03 GMT -6
You can easily go 10mm in either direction on a factory rim, so yes 245 would be fine with your wheels... but there might be a problem with rubbing. Someone with wider tires should chime in and let you know about that. Just remember to keep as close to stock tire height (by reducing the sidewall height as the tire gets wider), so your speedometer isn't thrown too far out of whack. So instead of 235/60, you might want 245/55 or 245/50.
I would think that handling and cornering might suffer if you have different widths front and rear, but I don't know for sure. You wouldn't be able to fully rotate the tires either, which would cause them to wear down faster.
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Post by kobalt on Oct 20, 2004 14:28:14 GMT -6
I just bought tires from discounttiresdirect.com 3 weeks ago - great vendor. 245s should not rub as there is not much difference. Go with 245/55 like scottydl said to preserve proper tire height/speedometer reading.
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Post by JimW on Oct 20, 2004 18:03:05 GMT -6
That size wont work to well on a classic Aurora. You MUST maintain the overall tire height of 27.1" and shouldnt be any more/less the 5% of that figure.
The tranny bases everything on that rolling diameter and any increase of 27" will adversely affect the life of the transmission.
If you are going +1 rim I suggest
235/55/17
or
255/50/17
for winter the best tire (granted you put back on your stock wheels is...stock tire 235/60/16 or 215/65/16.
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Post by stevensolds on Oct 20, 2004 19:14:46 GMT -6
damn screw it then. i dont need to wear out my tranny any more because i am probably too rough on it anyway. i have the pedal to the carpet a lot and i put it in to the 6000-6200 rpm range a lot too. i did 100 on I-95 yesterday man WOOT i was rollin'
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Post by JimW on Oct 20, 2004 20:12:12 GMT -6
Use a tire calculator to find out what the tire height is when rolling with a 245/55, but methinks its to big. 235/55/17 is what I have now, and its the same height as my stock tires....so is 255/50/17s Not to discourage, but just be aware  |
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Post by Aurora40 on Oct 20, 2004 20:12:41 GMT -6
The tranny bases everything on that rolling diameter and any increase of 27" will adversely affect the life of the transmission. I agree you should keep the stock tire height, but why would it wear out the tranny? It would definitely affect the accuracy of your speedo, your odometer, any concept of fuel economy, and may possibly weird out the traction control or ABS though that's not so likely. I definitely wouldn't put bigger tires on the rear. For one, what's the point in a FWD, front-heavy car? |
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Post by JimW on Oct 20, 2004 20:15:07 GMT -6
I higher tire increases the rolling distance, the tranny is geared for a particular length and the speedo is control by the transmission. When I was looking into the 17's this spring my Chev/Olds service manager and I talked about it.
Apparently the Tech2 GM cars (2000+) can be computer controlled to suit larger rims.
I was told it was all tranny related.
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Post by Aurora40 on Oct 20, 2004 20:18:46 GMT -6
I higher tire increases the rolling distance, the tranny is geared for a particular length and the speedo is control by the transmission. When I was looking into the 17's this spring my Chev/Olds service manager and I talked about it. Yup, but that won't affect the tranny's life, just the accuracy with which it reports the speed. And a taller tire would be like reducing the gear ratio, hurting acceleration, but lowering cruising rpm (though you may not realize it since your speedo will say the same speed at the same rpm, it's just when your speedo says 65mph, you are actually probably going 75mph.) |
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Post by stevensolds on Oct 20, 2004 20:50:44 GMT -6
wow wouldnt that be nice - - speedo saying you are going 65 and you are going 75. id have 3 or 4 speeding tickets in 3 months
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Post by JimW on Oct 20, 2004 21:07:34 GMT -6
Yeah not the best way to go eh Steven? There are options but they are limited....I found the 17's to really set my car off nicely  Cant wait for big ol 255's |
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Post by Letitroll98 on Oct 20, 2004 22:25:13 GMT -6
Here's a tire size comparitor (sic?) link for any size tire or wheel size. Just put in your factory OEM size (235/60/16 for classic) and scroll down the chart. You do have to average the size as it gives you the exact comparison size, i.e. it says 256mm/55/16 so you avg to 255mm. You'll see how it works. www.dsm.org/tools/tiresize.htmThere's also one on www.tirerack.com/ but I don't like it as much. |
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scottydl
Super Moderator
There's nothin' like an American V-8...
Posts: 7,373
Staff Member
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Post by scottydl on Oct 21, 2004 9:12:46 GMT -6
wow wouldnt that be nice - - speedo saying you are going 65 and you are going 75. id have 3 or 4 speeding tickets in 3 months But wait, don't you have a radar detector? You'd never get caught with one of those fancy things!  |
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Post by stevensolds on Oct 21, 2004 10:42:06 GMT -6
not the best one. it was used but it still works great. also im not so fortunate that the local cops use laser or vascar, so it doesnt help me there
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