Tire Purchase

[50Dodge]

Ok, I am getting ready for some new rubber for the 50 Coronet. When I bought the car it had/has air shocks with 235/60/15. I have to keep max air in shocks or they rub the fender lip. My original spare looks to be a 7.10  which I converted using your guys' references to be either a 215/75 or 225/70. I would like to run the 225/70 as they are a little shorter and wider. My plans will be to then drop the rear 1.5-2 in. Does anyone see or have had any issues running 225/70? Pics would be appreciated also.

[BobT-47P15]

I use 215-75R-15 radials on my 47 Plymouth.....which seem like the best size to me.  225 should probably work ok.

[Plymouthy Adams]

with those size tires you are obviously not running a stock wheel.....your very wheel if not stock will dictate what you can and cannot run based solely on the -/+ offset of the wheel profile as this will shift the centerline of the tire. 

[Thomba48]

Sorry wrong entry

Edited March 14, 2019 by Thomba48

[50Dodge]

Correct the current tire and rims are not stock, came on the car when purchased.

Edited March 14, 2019 by 50Dodge

[Plymouthy Adams]

in that case..you need to note the offset..typically stock wheels were neutral and narrow to the tune of 4.5 or 5.0   

[50Dodge]

Sorry, forgot to mention I will be putting the original rims on. They came with the car, but no tires.

[Plymouthy Adams]

measure your rim...most run 205 on the narrow rim....if you have the wider rim of that era, you can go 215....225s on the wider is a bit of a push....but then, that is my perspective.   Here is a base line as used by tire retailer for tire size verse width....

 

 

 

Rim width (inch)	Min. tire width (mm)	Ideal tire width (mm)	Max. tire width (mm)
5,0	155	165 or 175	185
5,5	165	175 or 185	195
6,0	175	185 or 195	205
6,5	185	195 or 205	215
7,0	195	205 or 215	225
7,5	205	215 or 225	235
8,0	215	225 or 235	245
8,5	225	235 or 245	255
9,0	235	245 or 255	265
9,5	245	255 or 265	275
10,0	255	265 or 275	285
10,5	265	275 or 285	295
11,0	275	285 or 295	305
11,5	285	295 or 305	315
12,0	295	305 or 315	325
12,5	305	315 or 325	335

 

Edited March 14, 2019 by Plymouthy Adams

[BobDeSoto]

51 DeSoto with original wheels - P225/75R15 - Radials

[50Dodge]

Thanks BobDeSoto for info.

[greg g]

Running 225 75 15 radials on 5.5 wide aftermarket wheels. Pretty close to 600 16 diameter. Have 205 on the front but they are too short for the rear, and throw off the speedo off by nearly 10 mph. My rears used to rub with weight in the trunk going around turns.  New shocks and spring to bracket bushings cured 99% of that depending on how much stuff in the trunk.  Also my springs have sagged so the rear is lower than stock.  The problem with wider tires is being able to jack the car up high enough to get them to clear the wheel openings when you need to change them. Sometimes a real 

Ain in the butt if dealing with a flat at the side of the road.

Edited March 15, 2019 by greg g