- mer / ▁ ▁Category : Comm unes ▁of ▁Cal v ados ▁( de partment ) ▁Category : Se as ide ▁resort s ▁in ▁France ▁Category : Cal v ados ▁communes ▁articles ▁need ing ▁translation ▁from ▁French ▁Wikipedia <0x0A> </s> ▁T ires ▁provide ▁for ▁ste ering , ▁tra ction , ▁bra king , ▁and ▁load ▁support ▁by ▁transm itting ▁forces ▁between ▁the ▁vehicle ▁and ▁the ▁road . ▁Later al ▁force ▁variation ▁( L F V ) ▁is ▁a ▁property ▁of ▁a ▁t ire ▁that ▁character izes ▁its ▁dynamic ▁behavior ▁of ▁these ▁forces . ▁ ▁High ▁values ▁of ▁L F V ▁for ▁a ▁given ▁t ire ▁reflect ▁a ▁high ▁level ▁of ▁manufact uring ▁variations ▁in ▁the ▁t ire ▁structure ▁that ▁will ▁im part ▁ride ▁dist urban ces ▁into ▁the ▁vehicle ▁in ▁the ▁later al , ▁or ▁ste ering , ▁direction . ▁ ▁L F V ▁is ▁measured ▁according ▁to ▁processes ▁specified ▁by ▁the ▁A ST M ▁International ▁in ▁A ST M ▁F 1 8 0 6 ▁– ▁Standard ▁Pract ice ▁for ▁T ire ▁Test ing . ▁ ▁L F V ▁can ▁best ▁be ▁explained ▁by ▁example . ▁ ▁Assume ▁a ▁perfectly ▁uniform ▁t ire ▁mounted ▁on ▁a ▁perfectly ▁round ▁wheel ▁loaded ▁with ▁a ▁constant ▁force ▁against ▁a ▁perfectly ▁round ▁test ▁wheel . ▁As ▁the ▁wheel ▁turns , ▁it ▁turns ▁the ▁t ire , ▁and ▁the ▁t ire ▁car c ass ▁under go es ▁repeated ▁de formation ▁and ▁recovery ▁as ▁it ▁enters ▁and ▁ex its ▁the ▁contact ▁area . ▁ ▁If ▁we ▁measure ▁the ▁later