Thunder trucks "Standard- Silver" Trucks143: 7.125" Axle - For boards 7.4" & thinner145: 7.62" Axle - For boards 7.4" - 7.9"147: 8.0"Axle - For boards 7.9" - 8.12"148: 8.25" Axle - For boards 8.12"-8.38"149: 8.5" Axle - For boards 8.38" - 8.62"151: 8.75" Axle - For boards 8.62" -8.86"161: 9.125" Axle - For boards 8.9" & UpNEW THUNDER POLISHED 161’S LIGHTNING QUICK RESPONSE & CONTROL - NOW IN 161’S - 9.125” AXLESTHE NEW THUNDER 161’S THUNDER’S EXCLUSIVE QUICK TURN GEOMETRY DESIGNED SPECIFICALLY FOR 8.9” DECKS.QUICK RESPONSE, LIGHTWEIGHT AND GUARANTEED STRONG.