al ▁force ▁between ▁the ▁t ire ▁and ▁the ▁wheel ▁we ▁will ▁see ▁zero ▁change ▁as ▁the ▁t ire ▁turns . ▁ ▁If ▁we ▁now ▁test ▁a ▁typical ▁production ▁t ire ▁we ▁will ▁see ▁the ▁later al ▁force ▁vary ▁as ▁the ▁t ire ▁turns . ▁▁▁ ▁Consider ▁a ▁good ▁t ire ▁with ▁L F V ▁of ▁ 4 ▁pounds . ▁ ▁This ▁t ire ▁will ▁indu ce ▁a ▁ 4 ▁p ound ▁force ▁side ways ▁into ▁the ▁vehicle ▁every ▁rotation . ▁ ▁The ▁frequency ▁of ▁the ▁force ▁will ▁increase ▁in ▁direct ▁proportion ▁to ▁rot ating ▁speed . ▁ ▁This ▁effect ▁will ▁influence ▁the ▁ste ering ▁of ▁the ▁vehicle . ▁ ▁T ire ▁mak ers ▁test ▁t ires ▁at ▁the ▁point ▁of ▁manufact ure ▁to ▁verify ▁that ▁the ▁L F V ▁is ▁within ▁allow able ▁quality ▁limits . ▁ ▁T ires ▁that ▁exceed ▁these ▁limits ▁may ▁be ▁scra pped ▁or ▁sold ▁to ▁mark ets ▁that ▁do ▁not ▁require ▁string ent ▁quality . ▁ ▁W ave form ▁analysis ▁ ▁L F V ▁is ▁a ▁complex ▁wave form . ▁ ▁It ▁is ▁expressed ▁using ▁several ▁standard ▁methods , ▁including ▁peak - to - pe ak , ▁first ▁harm onic , ▁second ▁harm onic , ▁and ▁higher - order ▁harm on ics . ▁ ▁In ▁production ▁L F V ▁testing ▁these ▁are ▁reported ▁as ▁both ▁magn itudes ▁and ▁angles . ▁ ▁See ▁also ▁ ▁Cor ner ing ▁force ▁Cam ber ▁thrust ▁Tra ction ▁circle ▁ ▁External ▁links ▁ ▁http :// www . free pat ent son line .