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California ProKart Challenge

Race Numbers
Please be aware that SKUSA has MANDATORY number panel color requirements. You risk being black-flagged off track, including practice sessions, if your panels do not meet all requirements for size and color.

Click the "Race Number Panels" link on the PKC Info menu on the left for more information.

You can only reserve a race number with PKC if you have an active SKUSA membership. With the exception of single digit earned numbers (see below), the only number that you are authorized to race with is the number found on your SKUSA membership card -- INCLUDING the area designator. If you race without the area designator letter, you will be exposed to the possibility of having to change your number panels at the event.

Single digit numbers

PKC class champions earn the right to run single digit numbers IN THE SAME CLASS the following year.  Click the "Number Reservations" link in the menu on the left for a list of the PKC single digit number holders in your region.  Even if a driver chooses not to run the single digit number earned, that number is reserved and unusable by any other driver for the balance of the competition year.

If you are moving to another class or wish to change your reserved race number, contact the PKC business office to reserve a new number: email This e-mail address is being protected from spambots. You need JavaScript enabled to view it or call 951-491-0808.

Area Designators by state

"a" = International
"c", "x", "b", "k" = (SoCal, HI, AZ)
"d" = (CO, NM)
"e" = (NE, IA, MO)
"f" = (FL)
"g" = (AR, LA, MS, KY, TN, AL)
"h" = (SD, ND, MN)
"j" = (WI, MI, IN, IL, OH)
"m" = (Mexico)
"n" = (MD, PA, NY, DE, NJ, DE)
"o" = (OK, KS)
"q" = (CT, RI, MA, VT, NH, ME)
"r" = Canada
"s" = (VA, WV, NC, SC, GA)
"t" = (TX)
"u" = (UT, WY, MT)
"y" = (NorCal and NV)
"z" = (WA, OR, ID)