Stewart and Martin crash in Loudon 301 practice

  
Tony Stewart (L) talks with crew chief Darian Grubb (Photo: Getty Images for NASCAR)
  

   By Mike Mulhern
   mikemulhern.net

   (story developing)

   LOUDON, N.H.
   Tony Stewart and Mark Martin spun and crashed in separate incidents early in Friday practice for Sunday's 301.
   Both men said their cars just "snapped around" on them, Stewart in turn four, Martin in turn two, ironically at the same time.
   Steward will have to go to a backup; Martin's crew is repairing his primary.
   It is unclear if braking might be an issue, but brakes are critical here, even more so than at Martinsville, where braking is a notorious issue.
   According to Brembo brake engineers, drivers are on the brakes longer in the corners here – more than five seconds – than anywhere else on the tour. On a brake-difficulty scale of 1-10, Martinsville rates a nine, Richmond an 8.5 and Loudon an 8.0.