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[[Category:Parts]]
[[Category:Motion parts]]

=Introduction=
{{wiki:Spindle photo.jpg|thumb}}
In an automobile, the wheel spindle, sometimes simply called the spindle, is a part of the suspension system that carries the hub for the wheel and attaches to the upper and lower control arms.

Spindles are carried by [[steering knuckles]] or "uprights". Although, the terms "steering knuckle" and "upright" are sometimes used interchangeably with "spindle", they refer to different parts.

=Challenges=

=Approaches=
{{wiki:Spindle diagram.jpg|thumb}}

  * [[https://www.couplemate.com.au/trailer-caravan-axles/trailer-stub-axle/40mm-square-axle-stub/|40mm square stub axle]]
  * [[https://www.truckspring.com/products/FlexiRide-Torsion-Half-Axles-Non-Adjustable-4-4-Inch-Bolt-Circle-Hubs-935-lbs-Capacity__FF-93-1.aspx|FlexiRide Torsion half axle]] and [[https://www.truckspring.com/products/FlexiRide-Base-Plate-550-lbs-935-lbs-Half-Axles__FS30-3.aspx|mounting plate]]
  * [[https://www.rigidhitch.com/sp-35684-axle-spindle-square-tapered.html|RigidHitch.com:  Trailer Axle Spindle for 1-3/8 to 1-1/16 I.D. Bearings]] plus machining
  * [[https://www.rigidhitch.com/asr3500s04-axle-less-suspension-system.html|RigidHitch.com:  Timbren® Axle-Less Suspension - 3,500 lb Capacity/Pair]] (hole spacing near 40mm and 60mm)

=References=
  * [[https://en.wikipedia.org/wiki/Spindle_(automobile)|Wikipedia: Spindle (automobile)]]
  * {{wiki:Flexiride brochure 1.pdf|thumb}}