Custom designed for the Factor Ostro 2021 seatpost.
3D printed with engineering-grade nylon carbon fiber. The perfect blend of strength and durability. Super light weight.
Choose your model. The SO or WA.
Easy to Install:
SO: Just remove your seatpost and slip it on. The snug fit keeps it in place.
WA: Wrap it around the seatpost and secure it with the nut and bolt.
One frame number holder
One 4mm stainless steel socket head bolt
One #8 stainless steel nylon insert lock nut
A word of caution when placing your bike on a roof rack with a frame number attached.