Seat Pack 17 L inferiori if it is mounted at

if it is mounted at the rear ( post mount )

After measuring the diameter of your frame's seat tube or seat post

for mounting luggage racks

Choose the size of the bracelet brackets based on the diameter of the rear triangle pendants   of your frame:

ma non solo

Seat Pack 17 L inferiori if it is mounted atThe BAC bikepacking seat pack features a proprietary attachment system called Hardwin 1: for quick and easy installation. It is compatible with all round seatposts and with many aerodynamic profile seatposts. Warning: not suitable for sprung saddles, all Selle Italia MODEL X saddles and, except in specific cases, suspension seatposts.