HP Velotechnik Cloud Nine Gekko Seat Cushion tandem couplers The Standard idler has a

The Standard idler has a bearing and retaining ring

Tri-Align Caliper Positioning System

not as a pair

Choose LEFT or RIGHT side

You may have to drill three holes in your seat

HP Velotechnik Cloud Nine Gekko Seat Cushion tandem couplers The Standard idler has aThis cushy add on for all Gekko models provides lots of extra comfort (living up to its name Cloud Nine!). And adds a slightly higher seating position on your rides. It is easy to mount, uses breathable fabric, and does not interfere with the integrated seat pouch or flag holder. Retrofittable. Does not work on the HP Velotechnik Scorpion ErgoMesh seats. Specifications: Pad base is 16. 5"x 16. 5" x 2" Pad back is 20. 5" x 16. 5" (tapers to 14" at top)