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Just talked to a nice fellow at Tire Rack about re-rubbering my 76.

Asked for wider in the back, he said:

225/70 15s in the front:
255/60 15's in the back

What do you all think? I'm not too familiar with what will or will not work. Anyone go with this set up?
Thanks,
David
 

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I have 255/60-15's all the way around on my 74. Feel free to take a look at the pics of it in my photos. I havent had any rubbing or clearance issues at all. It drives very nice considering the tires are just all season radials. Next year i plan on jumping up to 17 or 18's to get some better tire quality under it.
 

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hey, I'm planning on doing the same with my '69. It's pretty common to squeeze a little wider rubber in the back, and 255 is about as much as we can do with stock rims and trailing arms. I have manual steering, so I'm sticking with 225's in front.

Now I just have to determine which tire is the best bang for the buck... Looking at Goodyear Eagle GT II's right now.
 

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255-60 fits the rear with no mods, that size was optional on 78-82 C3s. It can be tight on the front, some rub some don't.... GM cut the fender lips to make room for the wider rubber.... if you want to be sure it won't rub then get 225-70 or 245-60 for the front, personally I prefer the 245-60 because it's a little wider and a little less sidewall (less flex).

fender gaps may look a little funny with 245-60 and 255-60, you might have less gap at the rear fenders, makes the front look 'high' ... you'll either have to raise the rear a little which is very easy to do, just tighten the bolts... or lower the front a little...
 

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Run the widest (front) tires you can. Most of the weight is on the front. Most of the braking is done by the front. And, the steering is done by the front. Reasonably important reasons to me.
 

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We have been running 275/50-15, 275/45-16, 275/40-17. 275/35-18 and 285/30-18 on all four corners mounted on 10" wide wheels. We haven't had any clearance issues. The tires will live longer if you can rotate them front to rear. As said above you need wide tires at the front, and as a bonus you will gain arm muscles "muscleservo". We have used these tires on 68-69 and 72's with modified trailing arms an poly bushings. I am not sure about the mud flap on never cars. On our cars there is more space at the front.:cheers:

Tires on the avatar are 285/30-18 Hoosier R3S04
 

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Time is running out and I have to make a decision

Wed I pick up the factory original 78 aluminum wheels to replace the old 15x10 enke gambler things on it. I've found a very good price on Goodrich TA's RWL and will probably have them put on Friday as the rims I'm getting have been in a garage holding up and older Trans Am while the reproductions tires were being produced. The guy had them on a El Camino for a while. Firehawks with about 40 to 50 % tread in 225/70/15's so I thought I'd mount them to see what they look like. I'm thinking at least 235/60/15s all around on the factory 8" rims but I see some of you are running 255/60/15's. It would be nice to be able to rotate them.

If they 255's fit on the 72 in this topic, aren't the odds are they would my 77.

I have to get a moon roof and door regulator in my 2000 Grand Am fixed and get 2 new tires for the 05 Goat. So my 2 days of vacation on Thu and Fri are going to be full so I really need to get closure on the Vette tires... 235 in stock and 255 overnite so I have to decide Wed for Thu or Thu for Friday. Closed on Sat.

Any one want to add any advice.

Thanks in advance
 

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My one owner 1979 L-82, 4spd, Gymkana ...

... has worn BFG T/As sized at 265 50 on the stock 15 x 8 Alluminum rims for all but the first year of its life. The fit with no problems. Current set is pretty old. Don't know if they still offer this size.

Getting tire of the stock wheels. Time for a new look for a while. I'm thinking 17 front / 18 rear Foose Legends with Toyo Proxes from TD4L.
 
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