空中鋼環

空中鋼環（）是一種懸掛於天花板的圓形鋼製器材（類似於呼拉圈），馬戲團表演者會在上面表演空中特技。它可以是靜止的、轉動的、擺動的。

空中鋼環或是空心或是實心的。較輕的鋼環在轉動起來比較容易；一旦一個實心的鋼環得到動力的時候，它會保持轉動更久。有時空中鋼環表演者會配有橫木、手環、腳環以幫助表演。

腳註

參考資料 
 Circus By Us Different Lyra Types
  simplycircus.com
 Simply Circus: Lyra Resource Page
 Simply Circus: Aerial Arts FAQ
 Basic Circus Arts Instruction Manual: Chapter 8 - "Manual for Safety and Rigging." [PDF, 3.3 MB] European Federation of Professional Circus Schools (FEDEC), 2008.
 FM 5-125: Rigging Techniques, Procedures, and Applications. [PDF, 3.6 MB] US Army, 1995.
 Steven Santos. Simply Circus:  "Rigging I." [Powerpoint presentation, 572 KB]
 Sharon McCutcheon, Geoff Perrem.  Circus in Schools Handbook. Tarook Publishing, 2004. (ISBN 0-9756874-0-9)
 Hovey Burgess, Judy Finelli. Circus Techniques.  Brian Dube, 1989. (ISBN 0-917643-00-3)
 Carrie Heller.  Aerial Circus Training and Safety Manual. National Writers Press, 2004.  (ISBN 0-88100-136-8)
 Shana Kennedy. Aerial Skills Illustrated 2007. Project 630570 at Lulu.com, 2007.
 Jayne C. Bernasconi and Nancy E. Smith. Aerial Dance. United States: Human Kinetics, 2008.  (ISBN 0-7360-7396-5) View at Google Books 
 Elena Zanzu, M.A. Il Trapezio Oscillante: Storie di Circo nell'Aria. (The Swinging Trapeze: Histories of the Circus in the Air.) Bologna University, Italy, 2004-2005. Language: Italian.
 Rebekah Leach and Julianna Hane. The Aerial Hoop Manual Volume 1. AerialDancing.com

外部連結 
 Aerial Arts FAQ (From Simply Circus)
 Lyra Tutorials Page (From Simply Circus)
 Coggs' Circus Q/A (Lyra): 
 U.S. Aerial Lyra Champion 2015  (From Rebekah Burke )
 This article  articulates how someone built an aerial hoop-- the key tool is a hydraulic pipe bender.

表演藝術
馬戲技能