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On more than one occassion during my studies on wingless sprints I've seen horrific crashes resulting from the RR axle shearing off in the turns w/o contact or seemingly rough conditions. Why does this happen? Is it a birdcage issue and possibly the bearing froze up and cut thru the axle? Or is it a lack of inspection? What is the rule of thumb on RR axle life span? 2 of the worst I've seen were both at PAS for the 360 Oval Nationals during qualifying. Like Markus Niemelä's crash... I talked with someone familiar with the crew that said it was all new equipment.
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