Hi I am new to this Discussion  I currently purchasing a 64 Deville convertible and It has bias ply tires that are 15 year old  they have L-78-15 tires and would like to put on radials . Question  what is a good cross to radial tire and is l-78-15 the original tire size. Thanks  Mark

Views: 1197

Reply to This

Replies to This Discussion

The 235/75R15 is a good match.  Look into the Ironman tires for a white wall. 

Hi Russ I am looking at the 235 75R15 in Ironman are those the RB12 after the tire size Thanks

Hey Russ   what size white wall do you recommend and what was the stock width  Thanks

I went with the ironmans, they ride well and feel good on the car. the width wall width is 1 inch. Not sure what the stock width is. 

Original white wall width and distance from rim across the 3 tire suppliers is discussed in our Tires: Original Tires and Rims (Wheels) used on 1963 & 1964 Cad...   Scroll down and you will see  chart. Help Page.

Hi Russ looked at the Ironman Tires quite a few people are complaining the white wall turns brown  after a year have you had this issue

Thank you Tony, So you agree with Russ Austin the 235 75 R15 ? Have you tried stick on weights for mag wheels?

I am surprised you don't run Bias Ply on your Eldo. I am strongly considering it for my 64 Fleetwood. By all accounts I have heard, the driving feel is better than radial. Bias Ply being softer. I am not a speed runner and most of the area around here is flat- so no large concerns there. The occasional jaunt on the freeway is the fastest I ever make it. 

Logan

Thank you

I recently changed out my Eldo's  bias ply tires for a set of radials, so I could drive the car and enjoy it a lot more.

I bought Coker's Firestone Steel Belted 721 LR78-15 "bias-look" radials with a very close to correct Cadillac 3/4" whitewall stripe. Matches the original spare in my car.  Overall diameter 28.78".

Price was $334.00 each. 

You can special-order tires similar to these from Diamondback (not sure Coker does this) with the sidewalls "blank", meaning there's no tire brand showing, only a size.  Makes the tires look classier to me.  

Mark. I just purchased a set of 820-15 Radial Damond back tires with a one inch whitewall they look  very similar to the original tires  which where 820-15 bias ply with a one inch white wall. $304.00 each.  The original spare tire in the trunk was a 820-15 US Royal with a one inch white wall. I should have them in two weeks.

Not sure, but it i a white wall tire. I like them on my car.

RSS

Photos

  • Add Photos
  • View All

Forum

Trouble with the transmission in my 1963 Fleetwood

Started by David Michael Bigeleisen in 1963/64 Cadillac Specific Discussion 16 hours ago. 0 Replies

Dear Cadillac friends:I have a 1963 Fleetwood.The transmission dipstick has bubbles in it when I check the fluid.Also, the transmission shudders when I drive up a slight incline in reverse.I had the…Continue

CLC Membership dues are going up April 1. Join or Renew before March 31 & Save!

Started by Jason Edge in Chapter Discussion. Last reply by Jason Edge on Tuesday. 1 Reply

Here is a breakdown of the rate increases Effective April 1:E-membership…Continue

Sneak Peek at our Next Newsletter Feature - Denis Binette's 14K Mile Coupe de Ville

Started by Jason Edge in Newsletters on Tuesday. 0 Replies

Here is another sneak peak of our next newsletter feature - Denis Binette's 14K mile 1964 Coupe de Ville. I hope to have this distributed within the next couple of weeks. …Continue

Rear Main Seal & Transmission Pump Seal

Started by Jordan Johansen-Moe in 1963/64 Cadillac Specific Discussion. Last reply by CHRIS CARLSON on Saturday. 1 Reply

Hey everyone, I need to replace my transmission input seal before spring starts, I’ve been losing a lot of fluid post Sunday drive. I figured I’d do the rear main seal service bulletin at the same…Continue

Blog Posts

1963 RHS A/C kick panel - photos needed

Posted by SK on June 2, 2025 at 2:20pm 2 Comments

Could someone post front and back photos of the 1963 right-hand kick panel with A/C?

My car didn’t come with the original kick panels, so it's a bit of a mystery to me how I should cut the backing board and carpet to fit around the A/C.

Many thanks,

-Samu

'63 Tailfin Tales

Posted by Mark Mata on February 22, 2025 at 5:00pm 9 Comments

New old stock seat material

Posted by Ray Schick on August 22, 2024 at 6:25pm 2 Comments

I bought this seat material thinking that it’s…

Continue

Loud air moving sound within carb with cleaner removed

Posted by Dave Fehrle on March 23, 2024 at 3:23pm 8 Comments

While checking my Carter carb with engine running, I took the air cleaner off and there was a very loud hissing sound of air. I placed a piece of paper over the carb and it didn’t move up or down, is this normal?

Videos

  • Add Videos
  • View All

© 2026   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service