The tooth shape was computer designed for less friction. Will never spin on the hub.
Axle Gears »
PRO SLOT 1-8" axle »
![](https://d31wxntiwn0x96.cloudfront.net/hfawey/productimages/117.jpg?width=400&height=400&etag="644d1c24b3c7804559073fc47bc63fbd")
PRO SLOT - 0672-32 1 only 32T Brown Polymer Gear 48p for 1/8” axle