Feeling stupid...
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
Likes: 1
From: Philmont NY
Feeling stupid...
Put 235/70/15 (indy firehawks) on my 68 all around. looked great got in to pull out of the station and heard snap..crackle...crunch. Why didnt I just turn the wheel first to see.....
They are ordering 235/60's for the front now...I think I will have them get 4 all around so I can rotate. They checked the demensions and said they are smaller than the 225/70's that came off...
I almost cried....due to my own ignorance!!!
I put this in the tech section to see if the sizes that were suggested would work .
Thanks,
Jeff
They are ordering 235/60's for the front now...I think I will have them get 4 all around so I can rotate. They checked the demensions and said they are smaller than the 225/70's that came off...
I almost cried....due to my own ignorance!!!
I put this in the tech section to see if the sizes that were suggested would work .
Thanks,
Jeff
Last edited by h2ohouse; Aug 21, 2008 at 05:50 PM.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Aren't shops supposed to test drive cars they put new tires on to check for things like that? As far as I'm concerned they are responsible for any damage, and should take the old tires back free.
Drifting
Joined: Apr 2008
Posts: 1,305
Likes: 2
From: Lewisburg WV
thegazman
Your original tires 225/70/15 is: 27.4" diameter
235/70/15 is: 28" diameter
235/60/15 is: 26" diameter
255/60/15 is 17.1" in diameter and was an option on many C-3 from the factory. This size came on my 79 L-82. I don't know if they will fit your 68 or not.
235/70/15 is: 28" diameter
235/60/15 is: 26" diameter
255/60/15 is 17.1" in diameter and was an option on many C-3 from the factory. This size came on my 79 L-82. I don't know if they will fit your 68 or not.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
Likes: 1
From: Philmont NY
I take full responsability...I thought I had done my home work and told them what size I wanted. I would have normally changed my own, but did not have the time. I should have just turned the wheel before driving.
Damage is about a 4" rip behind the pass side tire about 3" from the bottom. Not that bad just mad at myself for not checking first.
235/70/15 is 6 tenth of an inch bigger......
I will go with the 235/60 on all four....255/60/15 seems a little too low.
I will talk with the shop at least I should get the 4 new ones mounted and balanced for free....
Thanks,
Jeff
Damage is about a 4" rip behind the pass side tire about 3" from the bottom. Not that bad just mad at myself for not checking first.
235/70/15 is 6 tenth of an inch bigger......
I will go with the 235/60 on all four....255/60/15 seems a little too low.
I will talk with the shop at least I should get the 4 new ones mounted and balanced for free....
Thanks,
Jeff
Burning Brakes
Joined: May 2007
Posts: 1,042
Likes: 1
From: Greensboro NC
I hope you meant that a 255/60/15 is 27" in diameter.....
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With that narrow a wheel, you might pop a bead out during a hard turn.
Melting Slicks
Joined: May 2007
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From: Bay Area CA
Race Director
Joined: Oct 2000
Posts: 12,596
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From: Shamong, NJ
The original tire on the 68 (and 69-72's) was a F70x15, which actually is comparable to a P215/70R15. The P225/70R15 corresponds to the GR70's as found on 73-78's. In 78 Chevy switched to the metric P225/70R15 and offered the P255/60R15 as an option.
Safety Car
Joined: Oct 2007
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From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
I see, the size difference now, I went with 235x 60 x16,
thats about 26.5 Dia. on all 4 tires, they look good.
but I don't have my body on yet !
good luck !... 69VETT
thats about 26.5 Dia. on all 4 tires, they look good.
but I don't have my body on yet !
good luck !... 69VETT
Drifting
Joined: Apr 2008
Posts: 1,305
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From: Lewisburg WV
Pro
Joined: Aug 2006
Posts: 649
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From: COOKEVILLE TN
Pro
Joined: Jul 2004
Posts: 668
Likes: 3
From: Platteville WI
60 is relative to the width. 60% of the width. So 255 vs. 235 is 20 millimeters wider. That works out to about 12 millimeters taller at each sidewall or 14 millimeters overall height. Each mfg has different ways of measuring. Not all tires are equal.
Race Director
Joined: May 2008
Posts: 17,140
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From: Houston (NW of) Texas
Tire Sizes and Dimensions Chart from BFGoodrich. Hope it helps.
http://www.bfgoodrichtires.com/specs/radial-t-a/12.html
http://www.bfgoodrichtires.com/specs/radial-t-a/12.html
Drifting
Joined: Apr 2008
Posts: 1,305
Likes: 2
From: Lewisburg WV
thegazman
True.."not all tires are equal"; however I was quoting diameter sizes from Firehawks which Jeff (h2ohouse) said he was using.