Old 04-25-2009, 06:22 AM
  #5  
dparker
Senior Member
RACING JUNKIE
 
Join Date: Jun 2003
Location: Hobbs, NM
Posts: 842
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To check your actual tire size you need to measure the circumference on your tire at racing air pressure. Then take that a divide it by 3.1416. You should always check your slicks to make sure they are the same. I've seen up to 2" difference.
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