Hello,
JS27UOB 1970 Dodge Challenger Convertible.
No build sheet, only fender tag info(2 tags).
BUT, this car has about every option available in 1970.
Had Rally 14's on it when I bought it.
Thought maybe an expert may have a good guess.

Thanks

Guesses are just that.

Do you have any reason to suspect that the 14" Rallyes are not original to the car?

Your wheels should have parts numbers and date codes stamped on them. They appear around the valve stem hole. You should inspect them to help determine if they are possibly original to your car. Your spare tire configuration and date codes may also lend some useful information.

August 69 and early September 69 wheels do not have part numbers

Yes this car is an early build in September.
The wheels are nicely painted, but I don’t see any numbers.
The wheels have old Polyglas goodyears, probably from the 90’s.
I’m getting ready to replace them, so maybe there are numbers inside the rims..

Came with space saver spare, as well.

Not at this time. I figured when I replace the tires, soon, I will be able to investigate further.

You never know,my Hemi R/T came with what you see,14"with full covers.This was back in the 80's,came from original owner bought local.

there are NO documented HEMI E-bodies with factory installed 14" wheels/tires

FLPlum how original is the car? there are a number of clues that could help narrow down the original configuration, but without documentation you can't be 100% sure & a lot can change in the past ~50 years.

There are a lot of NO documented things these days but they still exist !

Can you post a picture of your space saver and measure the length of the rod that holds the spare tire down?

This chart is why I grapple with what I should have on mine.
So you figure back in the day you would order 440, AC, power top, 8 track, luggage rack,rocker moldings, black hood treatment, but skimp on the wheels. I just can’t figure.
Thanks for the chart it is very interesting.

I put on 15” and radials for driving. The 14” that came on the car are in my garage. They have 20 year old polyglas on them.
I want to go back to original, so I thought another opinion here would push me in the right direction.
Both sizes are rally.

How original is the car?
red brake drums?
original transmission? what speedometer pinion?
what axle?
has the front end been rebuilt?

very few 15" wheel convertibles, especially at the beginning of the year

the 14" "ROAD" wheels are the more expensive OPTION, but the "RALLYE" wheels were NEW for the '70 model year

I'd determine the dates on the 14" wheels and POLYGLAS tires (as well as the specifics of your spare) - how many miles were on it when & what year did you purchase the car?

Wheels-steel
Tires-Goodyear
This we know for sure.

Correct dated wheels could have been swapped on by chance, or the owner seeked them out. Just no way to really know wothout paperwork.

I understand that, but by the '80s lots happened to these cars, like a second set for the winter? F60-15s were STANDARD & there were no OPTION for other tires available for a HEMI E-body. To claim your old car was different from all the rest, the burden of proof is on you!

Dealerships would also do a lot to appease customers.
An original owner of a 70 Cuda 340 contacted me years back looking for a spacesaver spare for his car.
He told me, that when he took delivery he told the dealership salesman he wanted a conventional spare after seeing that 'donut' in the trunk.
They gladly did so.
My hometown dealership changed out a set of 14 inch rallyes off a new 72 Cuda replacing them with 14 inch magnums from a 72 Satellite because the then purchaser of the new Satellite, a former school classmate of mine, liked the rallye wheel look.
So occasionally, changes happened to new cars at dealerships before they even left the lot.

Not trying to prove anything,only thing I know is what I had and what the original owner had.Knew of the car since new and had always been the way I bought it. I sold car in July of 81,the fellow that bought it sold it mid 90's in same condition as picture,never finished and it went to Florida,at this point it doesn't matter and I could care less.

Another clue could be that if your lower control arms have a spacer underneath the rebound bumper. If so that would indicate 15 inch wheels. If there's no spacer it would indicate 14 inch wheels.