High quality valve stems. Exceeds all CIK (worldwide design standards).
Designed for easier tire mounting.
NOTE: MB5-138V & MB5-140V exceed CIK maximum width specifications.
Our strengths in technology, innovation & development have broken many records.  in a class of their own, M-Series karting wheels have redefined magnesium wheel technology. We’ve applied our Portion-form technology to our high pressure magnesium cast process to create incredibly strong, light-weight wheels that enable you to manage heat, tire wear, grip and handling. These premium magnesium race wheels offer every advantage you’d expect and more, and better still – they’re affordable.