[bluejudge]

Does anyone know if there is a difference between these tires? I went on jegs to price bf Goodrich radial t/a's and there was Coker for $113 and regular bf Goodrich for $129. These are 225/60 14 inch. Thanks.

[will slow gto]

Don't know but are you sure you want 225/60/14? It is almost 2 inches shorter than 225/70/14, which is the closest sized radial tire to the G70s these cars came with when new.

[bluejudge]

I thought 60's are a wider tire?

[will slow gto]

The 60 refers to the sidewall. Both 225/60/14 and 225/70/14 put the same patch of rubber to the pavement. The 225/60/14 will look like a 'fatter' tire because it has less sidewall and therefore less height. This will give you the visual:

https://tiresize.com/calculator/

I'm assuming that since you are posting here you have a 68 or 69 GTO/Tempest/LeMans so keep in mind there is a limit to how wide/tall a tire you can put up front without rubbing. Plenty of threads on that so just do a search.

[Ram4king]

A 245/60 is the same height as a 225/70

[bluejudge]

Lol, now I'm all confused. Don, these are going on the JL rims. 14x6. I thought 245' s would not fit on these?

[Ram4king]

Tires are one thing I know very well. I've collected over 500 of them over the last 25 yrs. I don't know why. A 60 series tire is 1-2 inches wider than a 70. A 245 is equal to a G70. 235/60 is equal to an F70. I would personally run the 225/70 but the 60 series will fit on your 6 inch rim.

[6804gto]

Originally Posted by bluejudge

Does anyone know if there is a difference between these tires? I went on jegs to price bf Goodrich radial t/a's and there was Coker for $113 and regular bf Goodrich for $129. These are 225/60 14 inch. Thanks.

Pm sent

[dataway]

The numbers like 60 and 70 are a ratio of sidewall height to tread width. So changing width will change height if the ratio remains constant. Hence the 245 60 is the same height as a 225 70.

If I am not mistaken ... a "70" means the sidewall height is 70% of tread width. "60" means 60% of tread width etc. And back in the day, I think the letter code ... such as "G" referred to a specific tread width, the higher the letter, the wider the tread.

The hot tire back in the 70's was the venerable "N-50-15" for your jacked up, bad-azz hot rod

[will slow gto]

Originally Posted by bluejudge

Lol, now I'm all confused. Don, these are going on the JL rims. 14x6. I thought 245' s would not fit on these?

245s not recommended for 14x6.

[68ragtop]

For many years I had also thought the 50,60,70 was the width. But that's easy to generalize because typically a wider tire i.e.: 225-265 will need a shorter sidewall so it doesn't fit & look like a tractor tire. So the low sidewall height ratio (50-60) is synonymous with a wider tread. I don't think I learned that until the very early 90's when I bought an 87 Iroc camaro & was baffled by the 245/50/16's 245's do seem awfully wide for a 6" wheel. but, I am not a big fan of tires ballooning way pas the lip so I am a little biased. (no pun intended) A little bit wider looks awesome over oem sizes though.

68RT

[Greg Reid]

I think that back in the '60s and '70s the 50, 60, etc. number had to do with width but I'm not sure about that...what I do know is that modern tire sizes are classified by the metric system. The first number is the width in millimeters and the 2 digit number is a percentage of the width and defines the sidewall height.
Example, a 215/60/R15 is 215 mm wide, the sidewall is 60% of 215mm and R15 is a 15" radial.

[Formulajones]

Originally Posted by bluejudge

Does anyone know if there is a difference between these tires? I went on jegs to price bf Goodrich radial t/a's and there was Coker for $113 and regular bf Goodrich for $129. These are 225/60 14 inch. Thanks.

From what I've understood, yes. Coker bought and uses the older BFG molds for their tires and is what they have used for years making their radial vintage tires (white walls and redlines) are all made with older BFG molds. So the tread pattern is ever so slightly different/outdated perhaps.

New BFG tires sold from tire vendors like Tire Rack or Discount Tire, are selling BFG's made with their current updated molds.

Most likely why there is a price difference.

[68ragtop]

I have always thought the combination of tread width in metric & the wheel size in imperial was odd, but I suppose imperial tire width would have been confusing.

But the reverse was true. I Have an all original 1983 Mustang GT, that has the Michelin TRX tires. One of the last gasps from Michelin's X tire development from the 70's. It has 220/55/390mm tires. Talk about an oddball.

[dataway]

Had a girl friend back in the early 80's that had a TRX Mustang. Had the little V8 right? And the wheel diameter was unique I think. If you wanted to use different tires you had to get different wheels.

[68ragtop]

Originally Posted by dataway

Had a girl friend back in the early 80's that had a TRX Mustang. Had the little V8 right? And the wheel diameter was unique I think. If you wanted to use different tires you had to get different wheels.

Yep, Has to 5.0 HO 4 barrel @ a whopping 175hp. I was fortunate to buy the car from the original owners family. He had put some 14" Chrome nuggets & BFG's on it the following year, so when I bought the car I got the original TRX rims & tires with it. Sure wouldn't take it out on the highway with them, but they hold air & look the part. I think coker is remaking the tires now, but a they're a bit of $$ iirc. My wife's parents had an 83 GT when we first dated in the 80's. She would let me drive the car back then, Great memories from the time, so I have always been a little partial to the 5.0 GT's

[bluejudge]

Thanks everyone, looks like I am going to go with the 225/70 tires. What tire are you guys using for the 14x 7 rally 2 wheels?