Home Toyota GR Yaris String Theory X Custom Cages - GR Yaris Half Cage - Black
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String Theory Garage

String Theory X Custom Cages - GR Yaris Half Cage - Black

String Theory X Custom Cages - GR Yaris Half Cage - Black

Regular price £1,580.00 GBP
Regular price Sale price £1,580.00 GBP
Sale Sold out
Tax included.

Designed and Manufactured in the UK in Collaboration with Custom Cages.

The String Theory Half Cage is the Perfect Bolt in, Clubsport Spec Roll Cage. Offering the maximum protection available to a half cage in the event of an impact. 

Using 3D scanning technology to provide a super tight fit without requiring modifications to the interior for clean install and removal. 

Safely allowing Harness fitment using the rear bar. 

Lower brackets bolt into the original seatbelt mounting position, seatbelt then mounts to the new mounting position. 

Coming in at just under 25kg including all bolts and brackets. 

Supplied in Satin Black as Standard, Custom Colours can be supplied at additional cost. 

Made from CDS (Cold Drawn Seamless).

Custom Cages uses a CDS of a much higher specification. Originally designated CFS5, but nowadays called E355. When produced with the required heat-treatment this has excellent properties for basic roll cages.


  • Tensile Strength – minimum 510 MPa.
  • Yield Strength – minimum 370 MPa.
  • Elongation – minimum 25%.

About Custom Cages - 

Today, serving professional Motorsport teams is the driving force behind Custom Cages, designing, developing, and manufacturing roll cages for teams competing in WRC, R1-R5 classes, Super 2000, FIA GT3, WTCC, BTCC, international historic rally events, and a myriad of other Motorsport categories. Manufacturing every roll cage on the grid of the 2021 British Touring Car championship (bar one…there is always one!) shows how far Custom Cages has come. Our customers also include car manufacturer’s works Motorsport teams.

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