ROSE reducing adapters for an easy installation at the seat post. The brackets are precisely fitted to the SM-BTR2 battery.
Flexible fins securely hold the battery in the seat post.
Suitable for seat post inner Ø 21mm - 23 mm (outer Ø 27.2mm)
Suitable for seat post inner Ø 24mm - 27.5 mm (outer Ø 30.9-31.6mm)