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Old 10-07-2008, 10:13 PM
  #8212  
JoelV
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I just started running 17.5 rubber. I'm used to running 13.5 foam. I'm running a 4.2 fdr on our track. 66x43 carpet track. Running 112/48 to get the ratio. Using a prs spur gear and the prs adapter.
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