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 Post subject: Tires for 63 Valiant
PostPosted: Sat May 27, 2006 11:11 am 
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EFI Slant 6

Joined: Sat Sep 13, 2003 9:45 pm
Posts: 446
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I'm shopping on tire rack for tires. I am moving up from 13x4.5 to 14x5.5 wheels.
I was thinking about the popular 195/70/14, but I'm wondering if 195/65/14 is a better fit.
I also want the spare to be narrower so it doesn't stick out when it's stowed away, and have nearly the same diameter as the othe four tires.

My factory service manual says 63 Valiants came with 6.50-13 tires, which are 24.0" diameter.

195/65/14 is 23.98"
175/70/14 is 23.64" (spare)

Even though it's just a spare, is mixing tires with different aspect ratios really bad?


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 Post subject:
PostPosted: Sat May 27, 2006 11:33 am 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Do not mix tire sizes, it's not safe.

I like P205/70R14 on 14 x 5½" wheels, myself.

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 Post subject:
PostPosted: Sat May 27, 2006 12:08 pm 
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EFI Slant 6

Joined: Sat Sep 13, 2003 9:45 pm
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So, I should ignore the way the spare fits in the trunk and get all 5 tires the same?
I read that handling is sacrificed in favor of ride comfort when putting 225's on a 5.5 rim. According to this, 185/70/14 is better (for handling) than 195/70/14 on a 5.5 rim.


http://www.yokohamatire.com/utrimwidth.asp

Is anybody using 195/65/14 on a narrow A-body?


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 Post subject:
PostPosted: Sat May 27, 2006 12:49 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
A 6.50 13 is 24.7" diameter.

I have the 195/70 14's which supposedly are 24.75" diameter and my speedo still reads high. A 195/65 will make the speedo read even higher.


You'd need a 155 or 165 to fit in the wheel well. As that doesn't exist in a 14, get 5 tires all the same and use a 5-tire rotation. If the rims are different and you can't use a 5-tire rotation, you want the spare to be the same diameter, aspect ratio and width don't matter.


And you're correct. you want to be at the wider end of the acceptable range of allowed rim widths for handling. But as a 185 and 195 are so close, I think you're better off with the slightly more rubber, and slightly larger diameter.

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

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 Post subject:
PostPosted: Sat May 27, 2006 1:33 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Quote:
So, I should ignore the way the spare fits in the trunk and get all 5 tires the same?
That's what I do. Makes the tires last longer, 'cause you can do a five-wheel rotation pattern.
Quote:
I read that handling is sacrificed in favor of ride comfort when putting 225's on a 5.5 rim.
225 is kinda wide for 5½"
Quote:
http://www.yokohamatire.com/utrimwidth.asp
I wouldn't believe anything Yokohama said, even if they told me the sky is usually blue at 12 noon in Tucson. :lol:

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 Post subject:
PostPosted: Sat May 27, 2006 1:52 pm 
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EFI Slant 6

Joined: Sat Sep 13, 2003 9:45 pm
Posts: 446
Car Model:
Quote:
A 6.50 13 is 24.7" diameter.
Condran's book says it's 24.0" [pg.48]*
Other sources on Internet agree it's 24.7"

The 195/65/14 would be too small.

It's 195/70/14 all 'round.

I guess Dan is right when he says
Quote:
Tom Condran says a lot of funny stuff that's not true in his book. It's a good guide for principles of undercar improvements, because most of his theory is correct, but he is totally out to lunch on a lot of parts and equipment sourcing and factory-usage info.

He also said he would be updating and revising the book as better data became available. That didn't happen.


Last edited by sixsignet on Sat May 27, 2006 2:03 pm, edited 2 times in total.

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 Post subject:
PostPosted: Sat May 27, 2006 2:00 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Condran's book is generally unreliable as far as numbers are concerned.

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Too many people who were born on third base actually believe they've hit a triple.

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 Post subject:
PostPosted: Sun May 28, 2006 2:37 pm 
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EFI Slant 6

Joined: Sat Sep 13, 2003 9:45 pm
Posts: 446
Car Model:
Quote:
Quote:
I read that handling is sacrificed in favor of ride comfort when putting 225's on a 5.5 rim.
225 is kinda wide for 5½"
Do you think 205/65/14s are OK for 5 1/2" rims?


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 Post subject:
PostPosted: Sun May 28, 2006 3:32 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Quote:
Quote:
Quote:
I read that handling is sacrificed in favor of ride comfort when putting 225's on a 5.5 rim.
225 is kinda wide for 5½"
Do you think 205/65/14s are OK for 5 1/2" rims?

If you can get them for the same price as a 195 70 14.......... I don't think you'd really gain much over the 195/70 because a 5.5 is on the small side for a 205/65. i.e. I think the 195/70 and 205/65 on the 5.5 will handle the same; and since the 205/65 is probably more expensive, it's not worth it.........

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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