SIZES:
143: 7.125" Axle - For boards 7.4" & thinner
145: 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" - 9.5"
181: 10" Axle - For boards 9.5" and up
QUICK RESPONSE, LIGHTWEIGHT AND GUARANTEED STRONG.