Carson - if you're measuring your rim width as 6 7/8" then it is to wide for the standard 6x12 tires that came on the Original. According to the parts look-up the Original used 55A rims with 6x12 tires. I believe a 55A rim should be approximately 5.5" wide. For later tractors I see a 7JA-12 rim with a 23x8.5-12 tire. My guess would be your rim about 6 7/8" wide is a 7JA-12 and you should use a 23x8.5-12 tire. Please note this may be the correct tire for the rims you have, but neither are original to the CC Original tractor.