View Full Version : '68 coupe deville w/ Daytons Questions...

06-22-11, 05:55 PM
Hi everyone,
new to the forum here. I just bought a '68 coupe deville, fully restored engine, new brakes, and with 20'' dayton wire wheels (on vogue tires).

I've been told the Daytons are too big (since I believe stocks were only 15'') so it causes my tires to rub everytime I make a turn.
I've also been told not to worry about it.
Not quite sure what to do here. Should I be concerned a tire with blow a flat, etc?
Should I have them replaced to the original specs? If so, where would I start this hunt? FYI-I live in Los Angeles.

this is the car I've wanted my entire life and a lot of people have told me not to take it on a road trip because "anything can happen with these old cars". I desperately want to take it on a 500 mile road trip (each way) but I don't work on cars, so in the event of something breaking down, I'd have to take it to a shop.

But why buy the car of my dreams to just let it sit, right?

I'd appreciate your feedback, thanks!

06-22-11, 06:57 PM
What size are the tires? If you switch to a 225/50R20 tire, the overall diameter of the wheel would be the same as the stock rim and tire size. Doing that should eliminate any rubbing issues you have, and make the speedometer read correctly.

Without having the wheels at or near the factory diameter, I would not recommend any lengthy road trips. I personally would go back to the 15 inch rims because it would make the car handle better and safer to drive.

06-22-11, 07:14 PM
They only rub if you turn the wheel too far, like making a u-turn. Id keep them, I had 20s on my car for years with no problem. 15 would handle the bumps better and be a little kinder on your suspension. But 20s on vogues is hard to beat.

06-23-11, 12:55 AM
Thanks for the feedback.
Right now the tires are 245/40R20.

I've been browsing 15'' rims and I'm just a bit confused as to the sizes. A majority of them are 15x6, 15x,8, and 15x10. Should I go with 15x8 or 15x10? What size tires would I need?

06-23-11, 01:08 AM
Or rather...if I get 15x8 or 15x10 wheels/rims will I be good at the 225/75R15 Tire?

06-23-11, 01:09 AM
As long as the car is mechanically sound and in good tune I would think nothing of a 500 mile each way trip.

It's only like Adelaide to Melbourne and people here do that (leave Friday night, watch the game Saturday arvo drive home Sunday for back to work on Monday) just to go see the footy.

The fuel bill will no doubt be offset by the high rate of "smiles per gallon".....

Big 'ol Caddy with 8 litre engine and nice comfy seats....what more do you want in a touring car?

06-23-11, 01:30 AM
15x8 to run 225s. I think stock is 15x7, Cadillac specific.

06-23-11, 01:36 AM
Or rather...if I get 15x8 or 15x10 wheels/rims will I be good at the 225/75R15 Tire?

Go with the 15x8 rims... The factory tire is 9.00x15, which is about a 235/75R15

06-23-11, 01:39 AM
Wow, would of never guessed 15x9. I think 235s look good on these big cars.

06-23-11, 02:03 AM
Great, thank you thank you thank you:)

06-24-11, 03:32 AM
I bought four new tyres recently after much research for our 66 - turns out 235/75/15 is as close as you can get to the original outside diameter without going too wide - this is a good site to compare - you want to keep the difference to less than 2% ideally http://www.miata.net/garage/tirecalc.html

07-08-11, 05:52 PM
My 1968 Cadillac DeVille convertible is a great car for a road trip. It is a bit thirsty, but as long as you have it checked out for v-belts, hoses, brakes and things that can go haywire on any car, I would not hesitate to take it on a road trip. They ride like a dream and the power seat lets you adjust to different angles to combat fatigue. Mine has 15" wheels. With the fender skirts in place, I would think you would want the stock wheel size.
I love my old Caddy!