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What do the tire numbers mean?
Posted: Mon Aug 08, 2022 6:01 pm
by jiminbartow
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 (88.33 KiB) Viewed 1407 times
Re: What do the tire numbers mean?
Posted: Mon Aug 08, 2022 6:12 pm
by KWTownsend
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
Re: What do the tire numbers mean?
Posted: Mon Aug 08, 2022 6:14 pm
by tdump
Re: What do the tire numbers mean?
Posted: Mon Aug 08, 2022 6:18 pm
by A Whiteman
CCAE1 is probably an inventory code.
Yep, manufacturers part number.
Re: What do the tire numbers mean?
Posted: Mon Aug 08, 2022 10:08 pm
by jiminbartow
Thank you. I was wrong. I thought the 4.50 was the width of the inflated tire. Jim Patrick
Re: What do the tire numbers mean?
Posted: Tue Aug 09, 2022 10:14 am
by George Mills
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....