=Introduction= The hub is the center of the wheel where the spokes meet. They often attach to axles or U-joints, and sometimes contain bearings.
=Challenges=
=Approaches= <gallery> Wheel adapters.jpg|Wheel adapters Rear wheel assembly.jpg|Rear wheel mockup Front spindle.jpg|Front spindles </gallery> * [https://www.amazon.com/gp/product/B07NKSHSYM/ ADAPTER HUBS 1“ LIVE AXLE 4 LUG ATV GO KART TRAILER.]
=References= * [https://en.wikipedia.org/wiki/Wheel Wikipedia: Wheel]