What do the tire numbers mean?

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jiminbartow
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What do the tire numbers mean?

Post by jiminbartow » Mon Aug 08, 2022 6:01 pm

A couple of months ago, I installed (5) brand new 4.50-21 Goodyear tires on the 21” split rims of my 1926 coupe. I took a picture of one of the labels. While I think I know what the numbers 4.50-21 mean, I am not absolutely certain. I have no idea what the CCAE1 means. Jim Patrick

3E7CC8EE-10A2-42EA-890F-6AE439BA5456.jpeg
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KWTownsend
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Re: What do the tire numbers mean?

Post by KWTownsend » Mon Aug 08, 2022 6:12 pm

Jim-
4.50" is the sidewall height.
21" is the rim diameter.

Twice the sidewall height + rim diameter = tire outside diameter:

(2xx 4.50) + 21 = 30"

CCAE1 is probably an inventory code.

: ^ )

Keith


tdump
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Re: What do the tire numbers mean?

Post by tdump » Mon Aug 08, 2022 6:14 pm

If you can't help em, don't hinder em'

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A Whiteman
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Re: What do the tire numbers mean?

Post by A Whiteman » Mon Aug 08, 2022 6:18 pm

CCAE1 is probably an inventory code.
Yep, manufacturers part number.


Topic author
jiminbartow
Posts: 2202
Joined: Sun Jan 06, 2019 10:55 pm
First Name: James
Last Name: Patrick
* REQUIRED* Type and Year of Model Ts owned: 1926 Coupe
Location: Bartow, FL
MTFCA Number: 50126
Board Member Since: 2001

Re: What do the tire numbers mean?

Post by jiminbartow » Mon Aug 08, 2022 10:08 pm

Thank you. I was wrong. I thought the 4.50 was the width of the inflated tire. Jim Patrick

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George Mills
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Re: What do the tire numbers mean?

Post by George Mills » Tue Aug 09, 2022 10:14 am

CCAE1 is a tire code for a 4.50x21 polyester ply tire black rated just over 850 lbs. capacity each...

CCAE2 is a tire code for a 4.50x21 polyester ply tire whitewall rated just over 850 lbs. capacity each....

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