Steel highback rope.
Measurements are taken from inside of each barrel end (see picture).
 
If you want a super aggressive forward lean, you can buy a shorter version.
 
FT4 and FT ALU binding ropes are all interchangeable, the below is just a reference of what is typically on each model and size.
 
Sold as individual rope.
 
STEEL ROPES for FT4
S/515mm DIV221_BLK
M/530mm DIV253_BLK
L/XL/535mm DIV255_BLK
 
STEEL ROPES for FT ALU
S/475mm DIV229_BLK
M/L/520mm DIV257_BLK
XL/525mm DIV245_BLK