What fits

Two things decide fit, and both are standard.

Cage bosses

Almost every frame puts the two cage bolts 63 mm apart. If your cage bolts on with two bolts, the Riser and Rail fit.

The bottle

The Tail Cone and the Capsule are made for the standard round bottle, 25.5 cm around. That is the common 620 to 750 ml bottle. Tall insulated bottles and small kids' bottles are not standard.

The standard round bottle next to the Tail Cone