Furyous
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66 Coronet without the springs being moved? Or with them moved?
Can you fit a 275/60 on a
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Furyous
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Anyone here own a 66 Coronet?
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The tread on a 275-60-15 runs about 9" wide....so I'd say no. I have a 66 Belvedere which shares the same chassis.
696pack
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No not without rubbing either the springs of inside of the outer wheel well.
There have been countless threads about tire size, back spacing, wheel width on this web site and as a relatively new member I would suggest that you do a search for these threads.
The bottom line is that with stock wheel back spacing, no mods to the wheel wells or springs, no problems with rubbing with a normal size passenger load in the back seat, the largest tire/wheel you can use is a 255/60X15". Even with these you will have to lift each side of the car seperately and let the rear wheel/axle hange down on each side in order to get the wheel and tire in and out and even then it is a battle.
There have been countless threads about tire size, back spacing, wheel width on this web site and as a relatively new member I would suggest that you do a search for these threads.
The bottom line is that with stock wheel back spacing, no mods to the wheel wells or springs, no problems with rubbing with a normal size passenger load in the back seat, the largest tire/wheel you can use is a 255/60X15". Even with these you will have to lift each side of the car seperately and let the rear wheel/axle hange down on each side in order to get the wheel and tire in and out and even then it is a battle.
696pack
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And it is said that the Plymouth B bodies have a slightly larger wheel well than the Dodges.
Furyous
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Time to cut it up then.. Thanks.. It will have a 275 on it one way or another...
Jeff_383
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I have a 275/60 tire on a 67 Coronet with no wheel well mods, but SS springs in stock location. Now, it is on a 7" rim with 4 3/8" back spacing. I know it is a little narrow, but it works.
Furyous
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I would love to see some pictures of it..
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Well, a 7" wheel is really too narrow for a 275-60. I bet you have to run lowered air pressure to get a full footprint?
696pack
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Yes, there are all kinds of varibles as mentioned above. MOST people here are inquiring about stock appearing cars. Some are street/strip racers, some are strictly street and some are strictly strip.
It is simple common sense that if you raise the rear of the car, change the rear spring location, change the backspacing of the wheels, and never have anyone in your back seat then yes, you can get a larger tire on the 66-67 B bodies. It is all a matter of what you can live with.
I hate to hear someone talke about cutting up their wheel wells but it is your car to do with as you like. However before you do that and if your additional space required is minimal I would try rolling the inside of the wheel opening. You can do it with a baseball bat. Use a wooden one. It takes two people, one driving and one controlling the bat. Slide the tapered shaft of the bat between the tire and the inner portion of the wheel well at the front of the opening and have the driver SLOWLY drive forward as you watch the results and making necessary corrections. Let the bat rotate in you hand as this is being done if there is resistance and that it what it wants to do. You want a slow and easy motion so there are no kinks. You should not be able to see the results from the outside of the car, only when you look up inside the wheel well to see the inner lip rolled up out of the way.
As some as you start cutting wheel wells you open the door to rust.
It is simple common sense that if you raise the rear of the car, change the rear spring location, change the backspacing of the wheels, and never have anyone in your back seat then yes, you can get a larger tire on the 66-67 B bodies. It is all a matter of what you can live with.
I hate to hear someone talke about cutting up their wheel wells but it is your car to do with as you like. However before you do that and if your additional space required is minimal I would try rolling the inside of the wheel opening. You can do it with a baseball bat. Use a wooden one. It takes two people, one driving and one controlling the bat. Slide the tapered shaft of the bat between the tire and the inner portion of the wheel well at the front of the opening and have the driver SLOWLY drive forward as you watch the results and making necessary corrections. Let the bat rotate in you hand as this is being done if there is resistance and that it what it wants to do. You want a slow and easy motion so there are no kinks. You should not be able to see the results from the outside of the car, only when you look up inside the wheel well to see the inner lip rolled up out of the way.
As some as you start cutting wheel wells you open the door to rust.
Furyous
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well this car is to clean and i am not going to modify it any. I picked up a 66 coronet wagon today and i am going to cut it up for the 275's or maybe a 315...
Jeff_383
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I'll find some photos. I do lower the psi at the track, but I would also for any other drag radial as well. It is usually kept at 30 psi. I can load mine up with 5 people and be fine driving. I do it alot. There were many diff. in how cars were put together, but mine do fit.
696pack
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Aren't you the guy that said "Time to cut it up then.. Thanks.. It will have a 275 on it one way or another..."
??????
696pack
Well-Known Member
Yours fit because you have super stock springs that have raised the body away from the axle/wheels/tires and also the reason you are able to load the car so heavily.
We have been speaking of what will fit under a factory stock car without doing any modifications. Your car does not meet that description.
440brew
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waygun
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Yes the tire will fit with no modifications..
Although the 7 inch wide rim is acceptable,an 8 inch is best with a 4.50" backspacing.
It will be a tight fit and may rub the right side inner wheel well under load or over bumps.
The cure for that is install air shocks and raise the car until it stops rubbing-aprox 1/2inch or 40 psi in the shocks.
Monroe part # MA757
I work at a tire shop and had helped other members here as well.
Hope this helps.
Although the 7 inch wide rim is acceptable,an 8 inch is best with a 4.50" backspacing.
It will be a tight fit and may rub the right side inner wheel well under load or over bumps.
The cure for that is install air shocks and raise the car until it stops rubbing-aprox 1/2inch or 40 psi in the shocks.
Monroe part # MA757
I work at a tire shop and had helped other members here as well.
Hope this helps.
slick66
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I have a 66 Plymouth Satellite and I took (waygun's) recommendation. I put 275/60/15's with air shocks at 30 psi. no rubbing. See Avatar. Rims are 15x8 with 4.5' BS from Foose wheels. Furyous additional pictures if you PM me.
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Are you sure it's acceptable by the tire manufacturer? Even though I don't work for a tire store, I've worked with tires most of my adult life and the majority of the tire mans recommend that optimum rim size should be the same width as the tire tread with deviation of no more than 1" either way.....for optimum results in tire performance of course.
Also, for the person that only runs 30psi in order to make a 'complete' footprint is not getting optimum results from the tire. If you're running more than 10% off of recommended inflation rate, you're a long ways from optimum. The tire will not handle at it's intended rate of performance plus it will run hotter when it's under inflated.....
Jeff_383
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I run this pressure and rim size for years with radials and D/R with no problems. Handles and drives fine, it's not a corner carver or daily driver. I usually have a 1.60-1.65 60ft. Say what you will, it works.
waygun
Well-Known Member
You have to remember that the car originally ran bias ply tires and when installing radials you have to add 4 to 6 psi to the radial tires.
Most older Mopars only called for 24 or 26 pounds of air.
Do the math--As others said,30 PSI is fine.
A lower profile tire wil give you more road feel and running them on the street at max PSI is just plain harsh and the car will wander all over the road.
Running S/S springs will add to the stiff ride and the 30 PSI will compensate that.
Always go by what the vehicle manufacturer calls for-(then add for the radials)-not what the maximum is on the tire.
The maximum load and PSI is a DOT safety requirement to tell the owner not to exceed those limits.
As for the rim and tire width,I have been using the Tire Guide for twenty years.
Sectional tread width and bead witdh are two totally different measurements.
The tire manufacturers and the Tire Guide both show the recommended rim widths for particular tire sizes.
As mentioned,7 inch rim is acceptable--not perfect--but an 8 inch is recommended by most tire manufacturers depending on the company..
Minimum is 7.5 maximum is 9.5.
I had customers run the 7 inch rims with no problems even though I did not agree with it.
I prefer the look and handling of the 8 inch with the 2756015's.
Keep in mind,people,the original poster asked for help regarding a WAGON--which does have larger wheel wells than hardtops and seedans.
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