No. of wheels and runways

Date:         20 Nov 97 02:53:42 
From:         luisma@spainmail.com (Luis Manuel Perez Llera)
Organization: Unisource Espana NEWS SERVER
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Does anybody know if there is any regulation stating that the
weight-per-wheel is limited in aircrafts due to runways care? In other
words, the reason for the modern aircrafts wear more wheels than older
ones is the danger of wheel explosion or the runway strength?